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ER UMN 20241008 version

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Reviewed-by: Sarda, Priya <prsarda@noreply.gitea.eco.tsi-dev.otc-service.com>
Co-authored-by: Qin Ying, Fan <fanqinying@huawei.com>
Co-committed-by: Qin Ying, Fan <fanqinying@huawei.com>
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Qin Ying, Fan 2024-10-08 10:04:17 +00:00 committed by zuul
parent e7e93cc17c
commit b8f7d6334f
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</th> </th>
</tr> </tr>
</thead> </thead>
<tbody><tr id="UgChangeHistory__row725819203541"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p725932018545">2024-09-18</p> <tbody><tr id="UgChangeHistory__row177814312405"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p126541534134012">2024-10-08</p>
</td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p166545344406">Modified the following content:</p>
<p id="UgChangeHistory__p965415343407">Modified the screenshot about the quota page in <a href="er_01_0057.html">Viewing Quotas</a>.</p>
</td>
</tr>
<tr id="UgChangeHistory__row725819203541"><td class="cellrowborder" valign="top" width="34%" headers="mcps1.3.1.1.3.1.1 "><p id="UgChangeHistory__p725932018545">2024-09-18</p>
</td> </td>
<td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p14447236105415">Modified the following content:</p> <td class="cellrowborder" valign="top" width="66%" headers="mcps1.3.1.1.3.1.2 "><p id="UgChangeHistory__p14447236105415">Modified the following content:</p>
<p id="UgChangeHistory__p1487803025415">Modified the figure name of scheme 1 in <a href="er_01_0129.html">Selecting a Networking Scheme</a>.</p> <p id="UgChangeHistory__p1487803025415">Modified the figure name of scheme 1 in <a href="er_01_0129.html">Selecting a Networking Scheme</a>.</p>

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<a name="er_01_0002"></a><a name="er_01_0002"></a> <a name="er_01_0002"></a><a name="er_01_0002"></a>
<h1 class="topictitle1">What Is an Enterprise Router?</h1> <h1 class="topictitle1">What Is an Enterprise Router?</h1>
<div id="body0000001135016056"><div class="p" id="er_01_0002__p595713314813">An enterprise router connects virtual private clouds (VPCs) and on-premises networks to build a central hub network. It has high specifications, provides high bandwidth, and delivers high performance. Enterprise routers use the Border Gateway Protocol (BGP) to learn, dynamically select, or switch between routes, thereby ensuring the service continuity and significantly improving network scalability and O&amp;M efficiency. <div id="body0000001135016056"><div class="p" id="er_01_0002__p595713314813">An enterprise router connects VPCs and on-premises networks to build a central hub network. It has high specifications, provides high bandwidth, and delivers high performance. Enterprise routers use the Border Gateway Protocol (BGP) to learn, dynamically select, or switch between routes, thereby ensuring the service continuity and significantly improving network scalability and O&amp;M efficiency.
</div> </div>
<div class="p" id="er_01_0002__p260314331077"><a href="#er_01_0002__fig1160410331975">Figure 1</a> and <a href="#er_01_0002__fig12604833873">Figure 2</a> show the networks with and without enterprise routers, respectively. <a href="#er_01_0002__table126045339718">Table 1</a> compares the two networks.<div class="fignone" id="er_01_0002__fig1160410331975"><a name="er_01_0002__fig1160410331975"></a><a name="fig1160410331975"></a><span class="figcap"><b>Figure 1 </b>A network without enterprise routers</span><br><span><img class="eddx" id="er_01_0002__image106048335712" src="en-us_image_0000001427301842.png"></span></div> <div class="p" id="er_01_0002__p260314331077"><a href="#er_01_0002__fig1160410331975">Figure 1</a> and <a href="#er_01_0002__fig12604833873">Figure 2</a> show the networks with and without enterprise routers, respectively. <a href="#er_01_0002__table126045339718">Table 1</a> compares the two networks.<div class="fignone" id="er_01_0002__fig1160410331975"><a name="er_01_0002__fig1160410331975"></a><a name="fig1160410331975"></a><span class="figcap"><b>Figure 1 </b>A network without enterprise routers</span><br><span><img class="eddx" id="er_01_0002__image106048335712" src="en-us_image_0000001427301842.png"></span></div>
<div class="fignone" id="er_01_0002__fig12604833873"><a name="er_01_0002__fig12604833873"></a><a name="fig12604833873"></a><span class="figcap"><b>Figure 2 </b>A network with enterprise routers</span><br><span><img class="eddx" id="er_01_0002__image7604143310714" src="en-us_image_0000001559118632.png"></span></div> <div class="fignone" id="er_01_0002__fig12604833873"><a name="er_01_0002__fig12604833873"></a><a name="fig12604833873"></a><span class="figcap"><b>Figure 2 </b>A network with enterprise routers</span><br><span><img class="eddx" id="er_01_0002__image7604143310714" src="en-us_image_0000001559118632.png"></span></div>

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<div id="body0000001135278004"><div class="p" id="er_01_0005__p8160161710358">An enterprise router provides the functions listed in <a href="#er_01_0005__table10511144911816">Table 1</a>, allowing you to:<ul id="er_01_0005__ul108073116367"><li id="er_01_0005__li1380791120362">Manage attachments, custom route tables, associations, propagations, and routes.</li><li id="er_01_0005__li280721173619">Manage permissions, tags, and quota to improve service security.</li></ul> <div id="body0000001135278004"><div class="p" id="er_01_0005__p8160161710358">An enterprise router provides the functions listed in <a href="#er_01_0005__table10511144911816">Table 1</a>, allowing you to:<ul id="er_01_0005__ul108073116367"><li id="er_01_0005__li1380791120362">Manage attachments, custom route tables, associations, propagations, and routes.</li><li id="er_01_0005__li280721173619">Manage permissions, tags, and quota to improve service security.</li></ul>
</div> </div>
<div class="tablenoborder"><a name="er_01_0005__table10511144911816"></a><a name="table10511144911816"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0005__table10511144911816" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Functions of an enterprise router</caption><thead align="left"><tr id="er_01_0005__row115112049111816"><th align="left" class="cellrowborder" valign="top" width="16%" id="mcps1.3.2.2.4.1.1"><p id="er_01_0005__p3187104715203">Function</p> <div class="tablenoborder"><a name="er_01_0005__table10511144911816"></a><a name="table10511144911816"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0005__table10511144911816" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Enterprise router functions</caption><thead align="left"><tr id="er_01_0005__row115112049111816"><th align="left" class="cellrowborder" valign="top" width="16%" id="mcps1.3.2.2.4.1.1"><p id="er_01_0005__p3187104715203">Function</p>
</th> </th>
<th align="left" class="cellrowborder" valign="top" width="62%" id="mcps1.3.2.2.4.1.2"><p id="er_01_0005__p1514605412204">Description</p> <th align="left" class="cellrowborder" valign="top" width="62%" id="mcps1.3.2.2.4.1.2"><p id="er_01_0005__p1514605412204">Description</p>
</th> </th>

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</table> </table>
</div> </div>
</div> </div>
<div class="section" id="er_01_0006__section21001422155310"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0006__ul1154735615222"><li id="er_01_0006__li4696181619286">Enterprise routers cannot be used together with virtual IP addresses of VPCs. If virtual IP addresses are used, contact customer service.</li><li id="er_01_0006__li1859293215119">Traffic cannot be forwarded from a VPC to the enterprise router that it attached to if you set the destination of a route whose next hop is the enterprise router to 0.0.0.0/0 in the VPC route table and if:<ul id="er_01_0006__ul72041734210"><li id="er_01_0006__er_01_0129_li17652438103917">An ECS in the VPC has an EIP bound.</li><li id="er_01_0006__er_01_0129_li0652153843918">The VPC is being used by ELB, NAT Gateway, VPC Endpoint, or Distributed Cache Service (DCS).</li></ul> <div class="section" id="er_01_0006__section21001422155310"><h4 class="sectiontitle">Constraints</h4><ul id="er_01_0006__ul1154735615222"><li id="er_01_0006__li4696181619286">Enterprise routers cannot be used together with virtual IP addresses of VPCs. If virtual IP addresses are used, contact customer service.</li><li id="er_01_0006__li1859293215119">Traffic cannot be forwarded from a VPC to the enterprise router that the VPC is attached to if you set the destination of a route whose next hop is the enterprise router to 0.0.0.0/0 in the VPC route table and if:<ul id="er_01_0006__ul72041734210"><li id="er_01_0006__er_01_0129_li17652438103917">An ECS in the VPC has an EIP bound.</li><li id="er_01_0006__er_01_0129_li0652153843918">The VPC is being used by ELB, NAT Gateway, VPC Endpoint, or Distributed Cache Service (DCS).</li></ul>
<p id="er_01_0006__p134412484281">To solve this problem, refer to <a href="er_01_0121.html">Why Traffic Can't Be Forwarded from a VPC with a Route Destination of 0.0.0.0/0 to Its Enterprise Router?</a></p> <p id="er_01_0006__p134412484281">To solve this problem, refer to <a href="er_01_0121.html">Why Traffic Can't Be Forwarded from a VPC with a Route Destination of 0.0.0.0/0 to Its Enterprise Router?</a></p>
</li><li id="er_01_0006__li16793411597">The VPC route table does not allow you to add a route whose destination address is 100.64.x.x and next hop is an enterprise router.<p id="er_01_0006__p4852161231010"><a name="er_01_0006__li16793411597"></a><a name="li16793411597"></a>To solve this problem, refer to <a href="er_01_0122.html">How Do I Route Traffic to 100.64.x.x Through an Enterprise Router?</a></p> </li><li id="er_01_0006__li16793411597">The VPC route table does not allow you to add a route whose destination address is 100.64.x.x and next hop is an enterprise router.<p id="er_01_0006__p4852161231010"><a name="er_01_0006__li16793411597"></a><a name="li16793411597"></a>To solve this problem, refer to <a href="er_01_0122.html">How Do I Route Traffic to 100.64.x.x Through an Enterprise Router?</a></p>
</li></ul> </li></ul>

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<td class="cellrowborder" valign="top" width="24.002400240024002%" headers="mcps1.3.7.2.4.1.2 "><p id="er_01_0011__p83849256715">Add <a href="#er_01_0011__section692619383113">attachments</a> to the enterprise router.</p> <td class="cellrowborder" valign="top" width="24.002400240024002%" headers="mcps1.3.7.2.4.1.2 "><p id="er_01_0011__p83849256715">Add <a href="#er_01_0011__section692619383113">attachments</a> to the enterprise router.</p>
</td> </td>
<td class="cellrowborder" valign="top" width="68.55685568556855%" headers="mcps1.3.7.2.4.1.3 "><p id="er_01_0011__p238482512718">Attach network instances to enterprise router 1 in region A.</p> <td class="cellrowborder" valign="top" width="68.55685568556855%" headers="mcps1.3.7.2.4.1.3 "><p id="er_01_0011__p238482512718">Attach network instances to enterprise router 1 in region A.</p>
<div class="p" id="er_01_0011__p1417281718913">Network instances from the same region<ul id="er_01_0011__ul33841625474"><li id="er_01_0011__li2038414251371"><strong id="er_01_0011__b2132786507">VPC attachments</strong>: VPC 1, VPC 2, and VPC 3</li><li id="er_01_0011__li1138416256719"><strong id="er_01_0011__b1024626801">Virtual gateway attachment</strong>: Virtual gateway</li><li id="er_01_0011__li138462510718"><strong id="er_01_0011__b71109484259">VPN gateway attachment</strong>: VPN gateway</li></ul> <div class="p" id="er_01_0011__p1417281718913">Network instances from the same region<ul id="er_01_0011__ul33841625474"><li id="er_01_0011__li2038414251371"><strong id="er_01_0011__b1050595542">VPC attachments</strong>: VPC 1, VPC 2, and VPC 3</li><li id="er_01_0011__li1138416256719"><strong id="er_01_0011__b473130360">Virtual gateway attachment</strong>: Virtual gateway</li><li id="er_01_0011__li138462510718"><strong id="er_01_0011__b71109484259">VPN gateway attachment</strong>: VPN gateway</li></ul>
</div> </div>
</td> </td>
</tr> </tr>
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</tbody> </tbody>
</table> </table>
</div> </div>
<div class="section" id="er_01_0011__section692619383113"><a name="er_01_0011__section692619383113"></a><a name="section692619383113"></a><h4 class="sectiontitle">Attachments</h4><p id="er_01_0011__p655914471330">If you want to attach a network instance to an enterprise router, you need to add an attachment of a specific type to the enterprise router. The attachment type varies according to the network instance, as listed in <a href="#er_01_0011__table1989203755810">Table 3</a>.</p> <div class="section" id="er_01_0011__section692619383113"><a name="er_01_0011__section692619383113"></a><a name="section692619383113"></a><h4 class="sectiontitle">Attachments</h4><p id="er_01_0011__p655914471330">If you want to attach a network instance to an enterprise router, you need to add an attachment of a specific type to the enterprise router. The attachment type varies by type of the network instance, as listed in <a href="#er_01_0011__table1989203755810">Table 3</a>.</p>
<div class="tablenoborder"><a name="er_01_0011__table1989203755810"></a><a name="table1989203755810"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0011__table1989203755810" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Attachments</caption><thead align="left"><tr id="er_01_0011__row59013374584"><th align="left" class="cellrowborder" valign="top" width="26%" id="mcps1.3.8.3.2.3.1.1"><p id="er_01_0011__p490133735810">Attachment Type</p> <div class="tablenoborder"><a name="er_01_0011__table1989203755810"></a><a name="table1989203755810"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0011__table1989203755810" frame="border" border="1" rules="all"><caption><b>Table 3 </b>Attachments</caption><thead align="left"><tr id="er_01_0011__row59013374584"><th align="left" class="cellrowborder" valign="top" width="26%" id="mcps1.3.8.3.2.3.1.1"><p id="er_01_0011__p490133735810">Attachment Type</p>
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</td> </td>
<td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p17781333184913">Optional</p> <td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p17781333184913">Optional</p>
<p id="er_01_0013__p654517251014">If you enable <strong id="er_01_0013__b11731037450">Default Route Table Association</strong>, select a route table for <strong id="er_01_0013__b52874794517">Association Route Table</strong>.</p> <p id="er_01_0013__p654517251014">If you enable <strong id="er_01_0013__b11731037450">Default Route Table Association</strong>, select a route table for <strong id="er_01_0013__b52874794517">Association Route Table</strong>.</p>
<ul id="er_01_0013__ul324694401412"><li id="er_01_0013__li162461144141413">You can select a custom route table.</li><li id="er_01_0013__li1424694431411">If you do not select a route table, the system will create a route table named <span class="parmname" id="er_01_0013__parmname12972293464"><b>defaultRouteTable</b></span> as the default association route table.<p id="er_01_0013__p4111134671415">If a route table named <strong id="er_01_0013__b1511510428474">defaultRouteTable</strong> already exists, the system will not create it again.</p> <ul id="er_01_0013__ul324694401412"><li id="er_01_0013__li162461144141413">You can select a custom route table.</li><li id="er_01_0013__li1424694431411">If you do not select a route table, a route table named <span class="parmname" id="er_01_0013__parmname12972293464"><b>defaultRouteTable</b></span> will be automatically created as the default association route table.<p id="er_01_0013__p4111134671415">If there is already a route table named <strong id="er_01_0013__b14693193137">defaultRouteTable</strong>, no route table will be created.</p>
</li></ul> </li></ul>
</td> </td>
<td class="cellrowborder" valign="top" width="22.482248224822484%" headers="mcps1.3.2.2.6.2.1.2.4.1.3 "><p id="er_01_0013__p1777843315496">er-rtb-b931</p> <td class="cellrowborder" valign="top" width="22.482248224822484%" headers="mcps1.3.2.2.6.2.1.2.4.1.3 "><p id="er_01_0013__p1777843315496">er-rtb-b931</p>
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</td> </td>
<td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p147921252101911">Optional</p> <td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p147921252101911">Optional</p>
<p id="er_01_0013__p27921952201912">If you enable <strong id="er_01_0013__b13361221174918">Default Route Table Propagation</strong>, select a route table for <strong id="er_01_0013__b157981031144913">Propagation Route Table</strong>.</p> <p id="er_01_0013__p27921952201912">If you enable <strong id="er_01_0013__b13361221174918">Default Route Table Propagation</strong>, select a route table for <strong id="er_01_0013__b157981031144913">Propagation Route Table</strong>.</p>
<ul id="er_01_0013__ul16792195251916"><li id="er_01_0013__li127921452181919">You can select a custom route table.</li><li id="er_01_0013__li107929529190">If you do not select a route table, the system will create a route table named <span class="parmname" id="er_01_0013__parmname895104044917"><b>defaultRouteTable</b></span> as the default propagation route table.<p id="er_01_0013__p879295241914">If a route table named <strong id="er_01_0013__b10939105044915">defaultRouteTable</strong> already exists, the system will not create it again.</p> <ul id="er_01_0013__ul16792195251916"><li id="er_01_0013__li127921452181919">You can select a custom route table.</li><li id="er_01_0013__li107929529190">If you do not select a route table, a route table named <span class="parmname" id="er_01_0013__parmname895104044917"><b>defaultRouteTable</b></span> will be automatically created as the default propagation route table.<p id="er_01_0013__p879295241914">If there is already a route table named <strong id="er_01_0013__b10939105044915">defaultRouteTable</strong>, no route table will be created.</p>
</li></ul> </li></ul>
</td> </td>
<td class="cellrowborder" valign="top" width="22.482248224822484%" headers="mcps1.3.2.2.6.2.1.2.4.1.3 "><p id="er_01_0013__p0719257212">er-rtb-b931</p> <td class="cellrowborder" valign="top" width="22.482248224822484%" headers="mcps1.3.2.2.6.2.1.2.4.1.3 "><p id="er_01_0013__p0719257212">er-rtb-b931</p>
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<tr id="er_01_0013__row126041774224"><td class="cellrowborder" valign="top" width="17.901790179017905%" headers="mcps1.3.2.2.6.2.1.2.4.1.1 "><p id="er_01_0013__p429614343307">Auto Accept Shared Attachments</p> <tr id="er_01_0013__row126041774224"><td class="cellrowborder" valign="top" width="17.901790179017905%" headers="mcps1.3.2.2.6.2.1.2.4.1.1 "><p id="er_01_0013__p429614343307">Auto Accept Shared Attachments</p>
</td> </td>
<td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p496473117314">Optional</p> <td class="cellrowborder" valign="top" width="59.615961596159615%" headers="mcps1.3.2.2.6.2.1.2.4.1.2 "><p id="er_01_0013__p496473117314">Optional</p>
<div class="p" id="er_01_0013__p105785114337">As the owner, you can share your enterprise router with other users. These other users can create attachments for your enterprise router.<ul id="er_01_0013__er_01_0069_ul664122183418"><li id="er_01_0013__er_01_0069_li18641224348">If you do not select this option, you must manually accept attachments to this enterprise router from the accounts that this enterprise router is shared with.</li><li id="er_01_0013__er_01_0069_li186412022344">If you select this option, the system will automatically accept attachments to this enterprise router from the accounts that this enterprise router is shared with.</li></ul> <div class="p" id="er_01_0013__p105785114337">As the owner, you can share your enterprise router with other users. These other users can create attachments for your enterprise router.<ul id="er_01_0013__er_01_0069_ul664122183418"><li id="er_01_0013__er_01_0069_li18641224348">If you do not select this option, you must manually accept attachments to this enterprise router from the accounts that this enterprise router is shared with.</li><li id="er_01_0013__er_01_0069_li186412022344">If you select this option, the attachments from the accounts that this enterprise router is shared with will be automatically accepted.</li></ul>
</div> </div>
<p id="er_01_0013__p1542917382359">For details, see <a href="er_01_0095.html">Sharing Overview</a>.</p> <p id="er_01_0013__p1542917382359">For details, see <a href="er_01_0095.html">Sharing Overview</a>.</p>
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<a name="er_01_0022"></a><a name="er_01_0022"></a>
<h1 class="topictitle1">Monitoring and Auditing</h1>
<div id="body0000002067713285"><p id="er_01_0022__p8060118"></p>
</div>
<div>
<ul class="ullinks">
<li class="ulchildlink"><strong><a href="er_01_0102.html">Cloud Eye Monitoring</a></strong><br>
</li>
<li class="ulchildlink"><strong><a href="er_01_0090.html">CTS Auditing</a></strong><br>
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<div id="body0000001135345928"><div class="section" id="er_01_0057__section1259721519218"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0057__p17651320182120">The following provides operations for you to view the quotas of enterprise routers and related resources in your account.</p> <div id="body0000001135345928"><div class="section" id="er_01_0057__section1259721519218"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0057__p17651320182120">The following provides operations for you to view the quotas of enterprise routers and related resources in your account.</p>
</div> </div>
<div class="section" id="er_01_0057__section1378992109"><h4 class="sectiontitle">How Do I View My Quota?</h4><ol id="er_01_0057__ol10265645175910"><li id="er_01_0057__li9265114575911">Log in to the management console.</li><li id="er_01_0057__li13265114565913">Click <span><img id="er_01_0057__image526511457593" src="en-us_image_0000001716625548.png"></span> in the upper left corner and select the desired region and project.</li><li id="er_01_0057__li1626511451596">In the upper right corner of the page, click <span><img id="er_01_0057__image15265194513591" src="en-us_image_0000001716466100.png"></span>.<p id="er_01_0057__p42650456591">The <strong id="er_01_0057__b732735020510">Service Quota</strong> page is displayed.</p> <div class="section" id="er_01_0057__section1378992109"><h4 class="sectiontitle">How Do I View My Quota?</h4><ol id="er_01_0057__ol10265645175910"><li id="er_01_0057__li9265114575911">Log in to the management console.</li><li id="er_01_0057__li13265114565913">Click <span><img id="er_01_0057__image526511457593" src="en-us_image_0000001716625548.png"></span> in the upper left corner and select the desired region and project.</li><li id="er_01_0057__li1626511451596">In the upper right corner of the page, click <span><img id="er_01_0057__image15265194513591" src="en-us_image_0000001716466100.png"></span>.<p id="er_01_0057__p42650456591">The <strong id="er_01_0057__b732735020510">Service Quota</strong> page is displayed.</p>
<div class="fignone" id="er_01_0057__fig194072588216"><span class="figcap"><b>Figure 1 </b>Service Quota</span><br><span><img id="er_01_0057__image1081211541720" src="en-us_image_0000001764265877.png"></span></div> <div class="fignone" id="er_01_0057__fig194072588216"><span class="figcap"><b>Figure 1 </b>Service Quota</span><br><span><img id="er_01_0057__image104209385394" src="en-us_image_0000002074955185.png"></span></div>
</li><li id="er_01_0057__li1826534513594">On the <strong id="er_01_0057__b436124710610">Service Quota</strong> page, view the used and total resource quotas.<p id="er_01_0057__p132661545175919">If a quota cannot meet your needs, apply for a higher quota by performing the operations in the next section.</p> </li><li id="er_01_0057__li1826534513594">On the <strong id="er_01_0057__b436124710610">Service Quota</strong> page, view the used and total resource quotas.<p id="er_01_0057__p132661545175919">If a quota cannot meet your needs, apply for a higher quota by performing the operations in the next section.</p>
</li></ol> </li></ol>
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<a name="er_01_0062"></a><a name="er_01_0062"></a> <a name="er_01_0062"></a><a name="er_01_0062"></a>
<h1 class="topictitle1">Overview</h1> <h1 class="topictitle1">Overview</h1>
<div id="body0000001197924817"><div class="section" id="er_01_0062__section116311314431"><h4 class="sectiontitle">Background</h4><p id="er_01_0062__p13141113818437">Four VPCs are created in region A on <span id="er_01_0062__text263320207459">the public cloud</span> and they need to communicate with each other.</p> <div id="body0000001197924817"><div class="section" id="er_01_0062__section116311314431"><h4 class="sectiontitle">Solution</h4><p id="er_01_0062__p13141113818437">Four VPCs are created in region A on <span id="er_01_0062__text263320207459">the public cloud</span> and they need to communicate with each other.</p>
<p id="er_01_0062__p1557115812548">You can create an enterprise router in region A and attach the four VPCs to the enterprise router. The enterprise router can route traffic among the VPCs so that they can communicate with each other.</p> <p id="er_01_0062__p1557115812548">You can create an enterprise router in region A and attach the four VPCs to the enterprise router. The enterprise router can route traffic among the VPCs so that they can communicate with each other.</p>
<div class="fignone" id="er_01_0062__fig1034610281162"><span class="figcap"><b>Figure 1 </b>Communications among VPCs in the same region</span><br><span><img class="eddx" id="er_01_0062__image1934682813612" src="en-us_image_0000001295153022.png"></span></div> <div class="fignone" id="er_01_0062__fig1034610281162"><span class="figcap"><b>Figure 1 </b>Communications among VPCs in the same region</span><br><span><img class="eddx" id="er_01_0062__image1934682813612" src="en-us_image_0000001295153022.png"></span></div>
<div class="note" id="er_01_0062__note18353103217419"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="er_01_0062__p129847506387">This document describes how to use an enterprise router to quickly allow multiple VPCs in the same region to communicate with each other.</p> <div class="note" id="er_01_0062__note18353103217419"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="er_01_0062__p129847506387">This document describes how to use an enterprise router to quickly allow multiple VPCs in the same region to communicate with each other.</p>
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<div class="section" id="er_01_0062__section174440408441"><h4 class="sectiontitle">Procedure</h4><p id="er_01_0062__p54681720164418"><a href="#er_01_0062__fig10285152624918">Figure 2</a> shows the procedure for using an enterprise router to allow multiple VPCs in the same region to communicate with each other.</p> <div class="section" id="er_01_0062__section174440408441"><h4 class="sectiontitle">Procedure</h4><p id="er_01_0062__p54681720164418"><a href="#er_01_0062__fig10285152624918">Figure 2</a> shows the procedure for using an enterprise router to allow multiple VPCs in the same region to communicate with each other.</p>
<div class="fignone" id="er_01_0062__fig10285152624918"><a name="er_01_0062__fig10285152624918"></a><a name="fig10285152624918"></a><span class="figcap"><b>Figure 2 </b>Flowchart for connecting VPCs in the same region</span><br><span><img class="eddx" id="er_01_0062__image20285162644919" src="en-us_image_0000001160921916.png"></span></div> <div class="fignone" id="er_01_0062__fig10285152624918"><a name="er_01_0062__fig10285152624918"></a><a name="fig10285152624918"></a><span class="figcap"><b>Figure 2 </b>Flowchart for connecting VPCs in the same region</span><br><span><img class="eddx" id="er_01_0062__image20285162644919" src="en-us_image_0000001160921916.png"></span></div>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0062__table1766082613110" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Steps for connecting VPCs in the same region</caption><thead align="left"><tr id="er_01_0062__row176607263119"><th align="left" class="cellrowborder" valign="top" width="6.350635063506351%" id="mcps1.3.2.4.2.4.1.1"><p id="er_01_0062__p466014261116">No.</p> <div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" id="er_01_0062__table1766082613110" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Steps for connecting VPCs in the same region</caption><thead align="left"><tr id="er_01_0062__row176607263119"><th align="left" class="cellrowborder" valign="top" width="32.12%" id="mcps1.3.2.4.2.3.1.1"><p id="er_01_0062__p1566092618117">Step</p>
</th> </th>
<th align="left" class="cellrowborder" valign="top" width="30.083008300830084%" id="mcps1.3.2.4.2.4.1.2"><p id="er_01_0062__p1566092618117">Step</p> <th align="left" class="cellrowborder" valign="top" width="67.88%" id="mcps1.3.2.4.2.3.1.2"><p id="er_01_0062__p12660162611118">Description</p>
</th>
<th align="left" class="cellrowborder" valign="top" width="63.56635663566357%" id="mcps1.3.2.4.2.4.1.3"><p id="er_01_0062__p12660162611118">Description</p>
</th> </th>
</tr> </tr>
</thead> </thead>
<tbody><tr id="er_01_0062__row186601926181116"><td class="cellrowborder" valign="top" width="6.350635063506351%" headers="mcps1.3.2.4.2.4.1.1 "><p id="er_01_0062__p6660126111115">1</p> <tbody><tr id="er_01_0062__row186601926181116"><td class="cellrowborder" valign="top" width="32.12%" headers="mcps1.3.2.4.2.3.1.1 "><p id="er_01_0062__p1666082671112"><a href="er_01_0063.html">Step 1: Plan Networks and Resources</a></p>
</td> </td>
<td class="cellrowborder" valign="top" width="30.083008300830084%" headers="mcps1.3.2.4.2.4.1.2 "><p id="er_01_0062__p1666082671112"><a href="er_01_0063.html">Step 1: Plan Networks and Resources</a></p> <td class="cellrowborder" valign="top" width="67.88%" headers="mcps1.3.2.4.2.3.1.2 "><p id="er_01_0062__p0660162681111">Plan CIDR blocks and the number of resources.</p>
</td>
<td class="cellrowborder" valign="top" width="63.56635663566357%" headers="mcps1.3.2.4.2.4.1.3 "><p id="er_01_0062__p0660162681111">Plan CIDR blocks and the number of resources.</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0062__row96601626191113"><td class="cellrowborder" valign="top" width="6.350635063506351%" headers="mcps1.3.2.4.2.4.1.1 "><p id="er_01_0062__p2660152661116">2</p> <tr id="er_01_0062__row96601626191113"><td class="cellrowborder" valign="top" width="32.12%" headers="mcps1.3.2.4.2.3.1.1 "><p id="er_01_0062__p17660192601113"><a href="er_01_0064.html">Step 2: Create an Enterprise Router</a></p>
</td> </td>
<td class="cellrowborder" valign="top" width="30.083008300830084%" headers="mcps1.3.2.4.2.4.1.2 "><p id="er_01_0062__p17660192601113"><a href="er_01_0064.html">Step 2: Create an Enterprise Router</a></p> <td class="cellrowborder" valign="top" width="67.88%" headers="mcps1.3.2.4.2.3.1.2 "><p id="er_01_0062__p1066017260112">Create one enterprise router for connecting VPCs in the same region.</p>
</td>
<td class="cellrowborder" valign="top" width="63.56635663566357%" headers="mcps1.3.2.4.2.4.1.3 "><p id="er_01_0062__p1066017260112">Create one enterprise router for connecting VPCs in the same region.</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0062__row106601826131116"><td class="cellrowborder" valign="top" width="6.350635063506351%" headers="mcps1.3.2.4.2.4.1.1 "><p id="er_01_0062__p14660112620112">3</p> <tr id="er_01_0062__row106601826131116"><td class="cellrowborder" valign="top" width="32.12%" headers="mcps1.3.2.4.2.3.1.1 "><p id="er_01_0062__p5660426191119"><a href="er_01_0065.html">Step 3: (Optional) Create VPCs and ECSs</a></p>
</td> </td>
<td class="cellrowborder" valign="top" width="30.083008300830084%" headers="mcps1.3.2.4.2.4.1.2 "><p id="er_01_0062__p5660426191119"><a href="er_01_0065.html">Step 3: (Optional) Create VPCs and ECSs</a></p> <td class="cellrowborder" valign="top" width="67.88%" headers="mcps1.3.2.4.2.3.1.2 "><p id="er_01_0062__p6311857111319">Create four VPCs and four ECSs. You can change the resource quantity and specifications as needed.</p>
</td>
<td class="cellrowborder" valign="top" width="63.56635663566357%" headers="mcps1.3.2.4.2.4.1.3 "><p id="er_01_0062__p6311857111319">Create four VPCs and four ECSs. You can change the resource quantity and specifications as needed.</p>
<p id="er_01_0062__p169884325122">If you already have these resources, skip this step.</p> <p id="er_01_0062__p169884325122">If you already have these resources, skip this step.</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0062__row13660102681116"><td class="cellrowborder" valign="top" width="6.350635063506351%" headers="mcps1.3.2.4.2.4.1.1 "><p id="er_01_0062__p2066042681114">4</p> <tr id="er_01_0062__row13660102681116"><td class="cellrowborder" valign="top" width="32.12%" headers="mcps1.3.2.4.2.3.1.1 "><p id="er_01_0062__p1166042619114"><a href="er_01_0066.html">Step 4: Create VPC Attachments for the Enterprise Router</a></p>
</td> </td>
<td class="cellrowborder" valign="top" width="30.083008300830084%" headers="mcps1.3.2.4.2.4.1.2 "><p id="er_01_0062__p1166042619114"><a href="er_01_0066.html">Step 4: Create VPC Attachments for the Enterprise Router</a></p> <td class="cellrowborder" valign="top" width="67.88%" headers="mcps1.3.2.4.2.3.1.2 "><p id="er_01_0062__p36601926101118">Attach the four VPCs to the enterprise router.</p>
</td>
<td class="cellrowborder" valign="top" width="63.56635663566357%" headers="mcps1.3.2.4.2.4.1.3 "><p id="er_01_0062__p36601926101118">Attach the four VPCs to the enterprise router.</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0062__row17660026171111"><td class="cellrowborder" valign="top" width="6.350635063506351%" headers="mcps1.3.2.4.2.4.1.1 "><p id="er_01_0062__p1066062610112">5</p> <tr id="er_01_0062__row17660026171111"><td class="cellrowborder" valign="top" width="32.12%" headers="mcps1.3.2.4.2.3.1.1 "><p id="er_01_0062__p666072631117"><a href="er_01_0067.html">Step 5: (Optional) Add Routes to VPC Route Tables</a></p>
</td> </td>
<td class="cellrowborder" valign="top" width="30.083008300830084%" headers="mcps1.3.2.4.2.4.1.2 "><p id="er_01_0062__p666072631117"><a href="er_01_0067.html">Step 5: (Optional) Add Routes to VPC Route Tables</a></p> <td class="cellrowborder" valign="top" width="67.88%" headers="mcps1.3.2.4.2.3.1.2 "><p id="er_01_0062__p766052616114">Add routes to the route tables of the VPCs for communication with the enterprise router.</p>
</td>
<td class="cellrowborder" valign="top" width="63.56635663566357%" headers="mcps1.3.2.4.2.4.1.3 "><p id="er_01_0062__p766052616114">Add routes to the route tables of the VPCs for communication with the enterprise router.</p>
<ul id="er_01_0062__ul13311228442"><li id="er_01_0062__li014613351436">If you enable <strong id="er_01_0062__b57646433126">Auto Add Routes</strong> when creating a VPC attachment, you do not need to manually add static routes to the VPC route table. Instead, the system automatically adds routes (with this enterprise router as the next hop and 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as the destinations) to all route tables of the VPC.</li><li id="er_01_0062__li7439651794">If an existing route in the VPC route tables has a destination to 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16, the routes will fail to be added. In this case, do not enable <strong id="er_01_0062__b23301648201210">Auto Add Routes</strong>. After the attachment is created, manually add routes.</li></ul> <ul id="er_01_0062__ul13311228442"><li id="er_01_0062__li014613351436">If you enable <strong id="er_01_0062__b57646433126">Auto Add Routes</strong> when creating a VPC attachment, you do not need to manually add static routes to the VPC route table. Instead, the system automatically adds routes (with this enterprise router as the next hop and 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as the destinations) to all route tables of the VPC.</li><li id="er_01_0062__li7439651794">If an existing route in the VPC route tables has a destination to 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16, the routes will fail to be added. In this case, do not enable <strong id="er_01_0062__b23301648201210">Auto Add Routes</strong>. After the attachment is created, manually add routes.</li></ul>
</td> </td>
</tr> </tr>
<tr id="er_01_0062__row266042616114"><td class="cellrowborder" valign="top" width="6.350635063506351%" headers="mcps1.3.2.4.2.4.1.1 "><p id="er_01_0062__p19661172619110">6</p> <tr id="er_01_0062__row266042616114"><td class="cellrowborder" valign="top" width="32.12%" headers="mcps1.3.2.4.2.3.1.1 "><p id="er_01_0062__p1266112616114"><a href="er_01_0068.html">Step 6: Verify Connectivity Among VPCs</a></p>
</td> </td>
<td class="cellrowborder" valign="top" width="30.083008300830084%" headers="mcps1.3.2.4.2.4.1.2 "><p id="er_01_0062__p1266112616114"><a href="er_01_0068.html">Step 6: Verify Connectivity Among VPCs</a></p> <td class="cellrowborder" valign="top" width="67.88%" headers="mcps1.3.2.4.2.3.1.2 "><p id="er_01_0062__p196611262117">Log in to the ECS and run the <strong id="er_01_0062__b19851916102817">ping</strong> command to verify the connectivity among VPCs.</p>
</td>
<td class="cellrowborder" valign="top" width="63.56635663566357%" headers="mcps1.3.2.4.2.4.1.3 "><p id="er_01_0062__p196611262117">Log in to the ECS and run the <strong id="er_01_0062__b19851916102817">ping</strong> command to verify the connectivity among VPCs.</p>
</td> </td>
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<a name="er_01_0064"></a><a name="er_01_0064"></a> <a name="er_01_0064"></a><a name="er_01_0064"></a>
<h1 class="topictitle1">Step 2: Create an Enterprise Router</h1> <h1 class="topictitle1">Step 2: Create an Enterprise Router</h1>
<div id="body0000001135280012"><div class="section" id="er_01_0064__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0064__p1325051721612">Create an enterprise router.</p> <div id="body0000001135280012"><p id="er_01_0064__p1325051721612">To connect VPCs in the same region, you only need to create one enterprise router. Perform the following operations to create an enterprise router:</p>
</div>
<div class="section" id="er_01_0064__section164484456163"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0064__ol72601351131615"><li id="er_01_0064__li1426075112165"><span>Log in to the management console.</span></li><li id="er_01_0064__li18272154101917"><span>Click <span><img id="er_01_0064__image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0064__li13278035192013"><span>Click <strong id="er_01_0064__b0877172561410">Service List</strong> and choose <strong id="er_01_0064__b38631530121411">Networking</strong> &gt; <strong id="er_01_0064__b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0064__p131231735172115">The <strong id="er_01_0064__b131401444138">Enterprise Router</strong> page is displayed.</p> <div class="section" id="er_01_0064__section164484456163"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0064__ol72601351131615"><li id="er_01_0064__li1426075112165"><span>Log in to the management console.</span></li><li id="er_01_0064__li18272154101917"><span>Click <span><img id="er_01_0064__image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0064__li13278035192013"><span>Click <strong id="er_01_0064__b0877172561410">Service List</strong> and choose <strong id="er_01_0064__b38631530121411">Networking</strong> &gt; <strong id="er_01_0064__b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0064__p131231735172115">The <strong id="er_01_0064__b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0064__li99180297231"><span>Click <strong id="er_01_0064__er_01_0069_b2615111335611">Create Enterprise Router</strong> in the upper right corner.</span><p><p id="er_01_0064__er_01_0069_p1728364172710">The <strong id="er_01_0064__er_01_0069_b1962195717551">Create Enterprise Router</strong> page is displayed.</p> </p></li><li id="er_01_0064__li99180297231"><span>Click <strong id="er_01_0064__er_01_0069_b2615111335611">Create Enterprise Router</strong> in the upper right corner.</span><p><p id="er_01_0064__er_01_0069_p1728364172710">The <strong id="er_01_0064__er_01_0069_b1962195717551">Create Enterprise Router</strong> page is displayed.</p>
<div class="fignone" id="er_01_0064__er_01_0069_fig17460112241319"><span class="figcap"><b>Figure 1 </b>Create Enterprise Router</span><br><span><img id="er_01_0064__er_01_0069_image2032921842219" src="en-us_image_0000001675058246.png"></span></div> <div class="fignone" id="er_01_0064__er_01_0069_fig17460112241319"><span class="figcap"><b>Figure 1 </b>Create Enterprise Router</span><br><span><img id="er_01_0064__er_01_0069_image2032921842219" src="en-us_image_0000001675058246.png"></span></div>
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</th> </th>
</tr> </tr>
</thead> </thead>
<tbody><tr id="er_01_0064__row1204132116401"><td class="cellrowborder" valign="top" width="17.741774177417742%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0064__p3204162104012">Region</p> <tbody><tr id="er_01_0064__row78881126192317"><td class="cellrowborder" valign="top" width="17.741774177417742%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0064__p3204162104012">Region</p>
</td> </td>
<td class="cellrowborder" valign="top" width="59.84598459845984%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0064__p1420422134014">Select the region nearest to your target users. Once the enterprise router is created, the region cannot be changed.</p> <td class="cellrowborder" valign="top" width="59.84598459845984%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0064__p1420422134014">Select the region nearest to your target users. Once the enterprise router is created, the region cannot be changed.</p>
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<h1 class="topictitle1">Step 3: (Optional) Create VPCs and ECSs</h1> <h1 class="topictitle1">Step 3: (Optional) Create VPCs and ECSs</h1>
<div id="body0000001194852941"><div class="section" id="er_01_0065__section187351725151810"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0065__p1877113231820">This section describes how to create VPCs and ECSs.</p> <div id="body0000001194852941"><p id="er_01_0065__p64041011551">Perform the following operations to create VPCs and ECSs. If you already have VPCs and ECS, skip this step.</p>
<p id="er_01_0065__p16560161117438">If you already have VPCs and ECS, skip this section.</p>
</div>
<div class="section" id="er_01_0065__section72621827154518"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0065__ul136625364459"><li id="er_01_0065__li166213366456">The CIDR blocks of the VPCs to be connected cannot overlap with each other.<p id="er_01_0065__er_01_0063_p79781107399"><a name="er_01_0065__li166213366456"></a><a name="li166213366456"></a>In this example, the CIDR blocks of the VPCs are propagated to the enterprise router route table as the destination in routes. The CIDR blocks cannot be modified and overlapping CIDR blocks may cause route conflicts.</p> <div class="section" id="er_01_0065__section72621827154518"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0065__ul136625364459"><li id="er_01_0065__li166213366456">The CIDR blocks of the VPCs to be connected cannot overlap with each other.<p id="er_01_0065__er_01_0063_p79781107399"><a name="er_01_0065__li166213366456"></a><a name="li166213366456"></a>In this example, the CIDR blocks of the VPCs are propagated to the enterprise router route table as the destination in routes. The CIDR blocks cannot be modified and overlapping CIDR blocks may cause route conflicts.</p>
<p id="er_01_0065__er_01_0063_p175454413356">If your existing VPCs have overlapping CIDR blocks, do not use propagated routes. Instead, you need to manually add static routes to the route table of the enterprise router. The destination can be VPC subnet CIDR blocks or smaller ones.</p> <p id="er_01_0065__er_01_0063_p175454413356">If your existing VPCs have overlapping CIDR blocks, do not use propagated routes. Instead, you need to manually add static routes to the route table of the enterprise router. The destination can be VPC subnet CIDR blocks or smaller ones.</p>
</li><li id="er_01_0065__li884518238203">Four ECSs must be in the same security group. If your ECSs are in different security groups, add rules to their security groups to allow access to each other.</li></ul> </li><li id="er_01_0065__li884518238203">Four ECSs must be in the same security group. If your ECSs are in different security groups, add rules to their security groups to allow access to each other.</li></ul>

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<h1 class="topictitle1">Step 4: Create VPC Attachments for the Enterprise Router</h1> <h1 class="topictitle1">Step 4: Create VPC Attachments for the Enterprise Router</h1>
<div id="body0000001135290982"><div class="section" id="er_01_0066__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0066__p8734113614438">This section describes how to attach the four VPCs to the enterprise router.</p> <div id="body0000001135290982"><p id="er_01_0066__p8734113614438">Perform the following operations to attach the four VPCs to the enterprise router:</p>
</div>
<div class="section" id="er_01_0066__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0066__ol11464202427"><li id="er_01_0066__li1426075112165"><span>Log in to the management console.</span></li><li id="er_01_0066__li18272154101917"><span>Click <span><img id="er_01_0066__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0066__li13278035192013"><span>Click <strong id="er_01_0066__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0066__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0066__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0066__er_01_0064_p131231735172115">The <strong id="er_01_0066__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p> <div class="section" id="er_01_0066__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0066__ol11464202427"><li id="er_01_0066__li1426075112165"><span>Log in to the management console.</span></li><li id="er_01_0066__li18272154101917"><span>Click <span><img id="er_01_0066__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0066__li13278035192013"><span>Click <strong id="er_01_0066__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0066__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0066__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0066__er_01_0064_p131231735172115">The <strong id="er_01_0066__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
</p></li><li id="er_01_0066__li6322510553"><span>Search for the target enterprise router by name.</span></li><li id="er_01_0066__li25751958135516"><a name="er_01_0066__li25751958135516"></a><a name="li25751958135516"></a><span>Go to the <strong id="er_01_0066__er_01_0070_b149551055141518">Attachments</strong> tab using either of the following methods:</span><p><ul id="er_01_0066__er_01_0070_ul1991183111311"><li id="er_01_0066__er_01_0070_li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0066__er_01_0070_b17170707167">Manage Attachment</strong>.</li><li id="er_01_0066__er_01_0070_li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0066__er_01_0070_wintitle1937416111163"><b>Attachments</b></span>.</li></ul> </p></li><li id="er_01_0066__li6322510553"><span>Search for the target enterprise router by name.</span></li><li id="er_01_0066__li25751958135516"><a name="er_01_0066__li25751958135516"></a><a name="li25751958135516"></a><span>Go to the <strong id="er_01_0066__er_01_0070_b149551055141518">Attachments</strong> tab using either of the following methods:</span><p><ul id="er_01_0066__er_01_0070_ul1991183111311"><li id="er_01_0066__er_01_0070_li14916391316">In the upper right corner of the enterprise router, click <strong id="er_01_0066__er_01_0070_b17170707167">Manage Attachment</strong>.</li><li id="er_01_0066__er_01_0070_li791113151319">Click the enterprise router name and click <span class="wintitle" id="er_01_0066__er_01_0070_wintitle1937416111163"><b>Attachments</b></span>.</li></ul>
</p></li><li id="er_01_0066__li17965175319582"><span>On the <strong id="er_01_0066__er_01_0070_b152911344133810">Attachments</strong> tab, click <strong id="er_01_0066__er_01_0070_b20492659123820">Create Attachment</strong>.</span><p><p id="er_01_0066__er_01_0070_p12356121005">The <strong id="er_01_0066__er_01_0070_b14448134711315">Create Attachment</strong> page is displayed.</p> </p></li><li id="er_01_0066__li17965175319582"><span>On the <strong id="er_01_0066__er_01_0070_b152911344133810">Attachments</strong> tab, click <strong id="er_01_0066__er_01_0070_b20492659123820">Create Attachment</strong>.</span><p><p id="er_01_0066__er_01_0070_p12356121005">The <strong id="er_01_0066__er_01_0070_b14448134711315">Create Attachment</strong> page is displayed.</p>

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<h1 class="topictitle1">Step 5: (Optional) Add Routes to VPC Route Tables</h1> <h1 class="topictitle1">Step 5: (Optional) Add Routes to VPC Route Tables</h1>
<div id="body0000001181090605"><div class="section" id="er_01_0067__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0067__p8734113614438">This section describes how to add routes to VPC route tables for traffic to route through the enterprise router.</p> <div id="body0000001181090605"><p id="er_01_0067__p8734113614438">Perform the following operations to configure the routes for the enterprise router in the VPC route table:</p>
<div class="note" id="er_01_0067__note1270820298563"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="er_01_0067__ul314619351536"><li id="er_01_0067__er_01_0062_li014613351436">If you enable <strong id="er_01_0067__er_01_0062_b57646433126">Auto Add Routes</strong> when creating a VPC attachment, you do not need to manually add static routes to the VPC route table. Instead, the system automatically adds routes (with this enterprise router as the next hop and 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as the destinations) to all route tables of the VPC.</li><li id="er_01_0067__er_01_0062_li7439651794">If an existing route in the VPC route tables has a destination to 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16, the routes will fail to be added. In this case, do not enable <strong id="er_01_0067__er_01_0062_b23301648201210">Auto Add Routes</strong>. After the attachment is created, manually add routes.</li></ul> <div class="note" id="er_01_0067__note1270820298563"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><ul id="er_01_0067__ul314619351536"><li id="er_01_0067__er_01_0062_li014613351436">If you enable <strong id="er_01_0067__er_01_0062_b57646433126">Auto Add Routes</strong> when creating a VPC attachment, you do not need to manually add static routes to the VPC route table. Instead, the system automatically adds routes (with this enterprise router as the next hop and 10.0.0.0/8, 172.16.0.0/12, and 192.168.0.0/16 as the destinations) to all route tables of the VPC.</li><li id="er_01_0067__er_01_0062_li7439651794">If an existing route in the VPC route tables has a destination to 10.0.0.0/8, 172.16.0.0/12, or 192.168.0.0/16, the routes will fail to be added. In this case, do not enable <strong id="er_01_0067__er_01_0062_b23301648201210">Auto Add Routes</strong>. After the attachment is created, manually add routes.</li></ul>
</div></div> </div></div>
</div>
<div class="section" id="er_01_0067__section292234514349"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0067__ul131131281209"><li id="er_01_0067__li141136286020">If your VPC only has a default route table, all subnets in it are associated with the default route table. You only need to add routes to the default route table for traffic to route through the enterprise router.</li><li id="er_01_0067__li1111316281607">If your VPC has multiple custom route tables and different subnets in the VPC are associated with different route tables, you need to add routes to each route table associated with the subnets for traffic to route through the enterprise router.</li></ul> <div class="section" id="er_01_0067__section292234514349"><h4 class="sectiontitle">Notes and Constraints</h4><ul id="er_01_0067__ul131131281209"><li id="er_01_0067__li141136286020">If your VPC only has a default route table, all subnets in it are associated with the default route table. You only need to add routes to the default route table for traffic to route through the enterprise router.</li><li id="er_01_0067__li1111316281607">If your VPC has multiple custom route tables and different subnets in the VPC are associated with different route tables, you need to add routes to each route table associated with the subnets for traffic to route through the enterprise router.</li></ul>
</div> </div>
<div class="section" id="er_01_0067__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0067__ol11464202427"><li id="er_01_0067__li74960206513"><span>Log in to the management console.</span></li><li id="er_01_0067__li18272154101917"><span>Click <span><img id="er_01_0067__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0067__li13278035192013"><span>Click <strong id="er_01_0067__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0067__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0067__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0067__er_01_0064_p131231735172115">The <strong id="er_01_0067__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p> <div class="section" id="er_01_0067__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0067__ol11464202427"><li id="er_01_0067__li74960206513"><span>Log in to the management console.</span></li><li id="er_01_0067__li18272154101917"><span>Click <span><img id="er_01_0067__er_01_0064_image627019339394" src="en-us_image_0000001190483836.png"></span> in the upper left corner and select the desired region and project.</span></li><li id="er_01_0067__li13278035192013"><span>Click <strong id="er_01_0067__er_01_0064_b0877172561410">Service List</strong> and choose <strong id="er_01_0067__er_01_0064_b38631530121411">Networking</strong> &gt; <strong id="er_01_0067__er_01_0064_b1949823361416">Enterprise Router</strong>.</span><p><p id="er_01_0067__er_01_0064_p131231735172115">The <strong id="er_01_0067__er_01_0064_b131401444138">Enterprise Router</strong> page is displayed.</p>
@ -15,48 +14,48 @@
</p></li><li id="er_01_0067__li151614110324"><span>Locate the target subnet and click the route table name in the <strong id="er_01_0067__b253014588614">Route Table</strong> column.</span><p><p id="er_01_0067__p6958131173320">The route table details page is displayed.</p> </p></li><li id="er_01_0067__li151614110324"><span>Locate the target subnet and click the route table name in the <strong id="er_01_0067__b253014588614">Route Table</strong> column.</span><p><p id="er_01_0067__p6958131173320">The route table details page is displayed.</p>
</p></li><li id="er_01_0067__li11736434183310"><span>Under <strong id="er_01_0067__b261214819716">Routes</strong>, click <strong id="er_01_0067__b13612848279">Add Route</strong>.</span><p><p id="er_01_0067__p42731228163414">The <strong id="er_01_0067__b336141013818">Add Route</strong> dialog box is displayed.</p> </p></li><li id="er_01_0067__li11736434183310"><span>Under <strong id="er_01_0067__b261214819716">Routes</strong>, click <strong id="er_01_0067__b13612848279">Add Route</strong>.</span><p><p id="er_01_0067__p42731228163414">The <strong id="er_01_0067__b336141013818">Add Route</strong> dialog box is displayed.</p>
</p></li><li id="er_01_0067__li179261535152915"><span>Configure the parameters based on <a href="#er_01_0067__table7204821194013">Table 1</a>.</span><p> </p></li><li id="er_01_0067__li179261535152915"><span>Configure the parameters based on <a href="#er_01_0067__table7204821194013">Table 1</a>.</span><p>
<div class="tablenoborder"><a name="er_01_0067__table7204821194013"></a><a name="table7204821194013"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0067__table7204821194013" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameter description</caption><thead align="left"><tr id="er_01_0067__row52047210406"><th align="left" class="cellrowborder" valign="top" width="17.501750175017502%" id="mcps1.3.3.2.10.2.1.2.4.1.1"><p id="er_01_0067__p4202192184016">Parameter</p> <div class="tablenoborder"><a name="er_01_0067__table7204821194013"></a><a name="table7204821194013"></a><table cellpadding="4" cellspacing="0" summary="" id="er_01_0067__table7204821194013" frame="border" border="1" rules="all"><caption><b>Table 1 </b>Parameter description</caption><thead align="left"><tr id="er_01_0067__row52047210406"><th align="left" class="cellrowborder" valign="top" width="17.501750175017502%" id="mcps1.3.4.2.10.2.1.2.4.1.1"><p id="er_01_0067__p4202192184016">Parameter</p>
</th> </th>
<th align="left" class="cellrowborder" valign="top" width="60.22602260226023%" id="mcps1.3.3.2.10.2.1.2.4.1.2"><p id="er_01_0067__p11204621154020">Setting</p> <th align="left" class="cellrowborder" valign="top" width="60.22602260226023%" id="mcps1.3.4.2.10.2.1.2.4.1.2"><p id="er_01_0067__p11204621154020">Setting</p>
</th> </th>
<th align="left" class="cellrowborder" valign="top" width="22.272227222722275%" id="mcps1.3.3.2.10.2.1.2.4.1.3"><p id="er_01_0067__p92049216408">Example Value</p> <th align="left" class="cellrowborder" valign="top" width="22.272227222722275%" id="mcps1.3.4.2.10.2.1.2.4.1.3"><p id="er_01_0067__p92049216408">Example Value</p>
</th> </th>
</tr> </tr>
</thead> </thead>
<tbody><tr id="er_01_0067__row16263115918580"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.3.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p797916211593">Destination Type</p> <tbody><tr id="er_01_0067__row16263115918580"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.4.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p797916211593">Destination Type</p>
</td> </td>
<td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.3.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p497915265917">The destination can only be <strong id="er_01_0067__b646712392715">IP address</strong>. You can set a single IP address or network segment.</p> <td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.4.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p497915265917">The destination can only be <strong id="er_01_0067__b646712392715">IP address</strong>. You can set a single IP address or network segment.</p>
</td> </td>
<td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.3.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p19797265919">IP address</p> <td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.4.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p19797265919">IP address</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0067__row155661555145112"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.3.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p984020445304">Destination</p> <tr id="er_01_0067__row155661555145112"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.4.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p984020445304">Destination</p>
</td> </td>
<td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.3.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p189168663117">The destination is used to route traffic from this VPC to other VPCs attached to the enterprise router. You can change it after the route is created.</p> <td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.4.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p189168663117">The destination is used to route traffic from this VPC to other VPCs attached to the enterprise router. You can change it after the route is created.</p>
<ul id="er_01_0067__ul278841163217"><li id="er_01_0067__li27881316321">Set the destination to the CIDR blocks of VPCs or their subnets that your VPC need to communicate with.</li><li id="er_01_0067__li6145165616545">Do not set the destination of a route (with an enterprise router as the next hop) to 0.0.0.0/0 in the VPC route table. If an ECS in the VPC has an EIP bound, the VPC route table will have a policy-based route with 0.0.0.0/0 as the destination, which has a higher priority than the route with the enterprise router as the next hop. In this case, traffic is forwarded to the EIP and cannot reach the enterprise router.</li></ul> <ul id="er_01_0067__ul278841163217"><li id="er_01_0067__li27881316321">Set the destination to the CIDR blocks of VPCs or their subnets that your VPC need to communicate with.</li><li id="er_01_0067__li6145165616545">Do not set the destination of a route (with an enterprise router as the next hop) to 0.0.0.0/0 in the VPC route table. If an ECS in the VPC has an EIP bound, the VPC route table will have a policy-based route with 0.0.0.0/0 as the destination, which has a higher priority than the route with the enterprise router as the next hop. In this case, traffic is forwarded to the EIP and cannot reach the enterprise router.</li></ul>
</td> </td>
<td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.3.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p18840144153016">10.0.0.0/8</p> <td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.4.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p18840144153016">10.0.0.0/8</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0067__row14429124613579"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.3.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p65701255175113">Next Hop Type</p> <tr id="er_01_0067__row14429124613579"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.4.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p65701255175113">Next Hop Type</p>
</td> </td>
<td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.3.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p16612593580">Select <strong id="er_01_0067__b18981192082116">Enterprise Router</strong>. You can change it after the route is created.</p> <td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.4.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p16612593580">Select <strong id="er_01_0067__b18981192082116">Enterprise Router</strong>. You can change it after the route is created.</p>
</td> </td>
<td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.3.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p5570185535117">Enterprise Router</p> <td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.4.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p5570185535117">Enterprise Router</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0067__row17778163334913"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.3.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p1331617105328">Next Hop</p> <tr id="er_01_0067__row17778163334913"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.4.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p1331617105328">Next Hop</p>
</td> </td>
<td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.3.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p158363033212">Select the target enterprise router. You can change it after the route is created.</p> <td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.4.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p158363033212">Select the target enterprise router. You can change it after the route is created.</p>
</td> </td>
<td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.3.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p10316171013220">er-test-01</p> <td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.4.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p10316171013220">er-test-01</p>
</td> </td>
</tr> </tr>
<tr id="er_01_0067__row354514460543"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.3.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p2012605305612">Description</p> <tr id="er_01_0067__row354514460543"><td class="cellrowborder" valign="top" width="17.501750175017502%" headers="mcps1.3.4.2.10.2.1.2.4.1.1 "><p id="er_01_0067__p2012605305612">Description</p>
</td> </td>
<td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.3.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p1058134120379">Provide supplementary information about the route. You can change the route after it is created.</p> <td class="cellrowborder" valign="top" width="60.22602260226023%" headers="mcps1.3.4.2.10.2.1.2.4.1.2 "><p id="er_01_0067__p1058134120379">Provide supplementary information about the route. You can change the route after it is created.</p>
</td> </td>
<td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.3.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p111261053135620">-</p> <td class="cellrowborder" valign="top" width="22.272227222722275%" headers="mcps1.3.4.2.10.2.1.2.4.1.3 "><p id="er_01_0067__p111261053135620">-</p>
</td> </td>
</tr> </tr>
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<a name="er_01_0068"></a><a name="er_01_0068"></a> <a name="er_01_0068"></a><a name="er_01_0068"></a>
<h1 class="topictitle1">Step 6: Verify Connectivity Among VPCs</h1> <h1 class="topictitle1">Step 6: Verify Connectivity Among VPCs</h1>
<div id="body0000001181250529"><div class="section" id="er_01_0068__section1776931281618"><h4 class="sectiontitle">Scenarios</h4><p id="er_01_0068__p8734113614438">This section describes how to log in to ECSs and verify the connectivity between VPCs.</p> <div id="body0000001181250529"><p id="er_01_0068__p8734113614438">Perform the following operations to log in to each ECS and verify the network connectivity between VPCs:</p>
</div>
<div class="section" id="er_01_0068__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0068__ol11464202427"><li id="er_01_0068__li154091419132410"><a name="er_01_0068__li154091419132410"></a><a name="li154091419132410"></a><span>Log in to an ECS.</span></li><li id="er_01_0068__li105742451915"><a name="er_01_0068__li105742451915"></a><a name="li105742451915"></a><span>Run the following command on the ECS:</span><p><p id="er_01_0068__p1789414544274"><b><span class="cmdname" id="er_01_0068__cmdname0812152082813">ping</span></b> <i><span class="varname" id="er_01_0068__varname1622102822819">IP address of the ECS</span></i></p> <div class="section" id="er_01_0068__section1846122044218"><h4 class="sectiontitle">Procedure</h4><ol id="er_01_0068__ol11464202427"><li id="er_01_0068__li154091419132410"><a name="er_01_0068__li154091419132410"></a><a name="li154091419132410"></a><span>Log in to an ECS.</span></li><li id="er_01_0068__li105742451915"><a name="er_01_0068__li105742451915"></a><a name="li105742451915"></a><span>Run the following command on the ECS:</span><p><p id="er_01_0068__p1789414544274"><b><span class="cmdname" id="er_01_0068__cmdname0812152082813">ping</span></b> <i><span class="varname" id="er_01_0068__varname1622102822819">IP address of the ECS</span></i></p>
<p id="er_01_0068__p63181653152711">If you log in to ecs-demo-01 to verify the connectivity between vpc-demo-01 and vpc-demo-02, run the following command:</p> <p id="er_01_0068__p63181653152711">If you log in to ecs-demo-01 to verify the connectivity between vpc-demo-01 and vpc-demo-02, run the following command:</p>
<p id="er_01_0068__p1322175362818"><b><span class="cmdname" id="er_01_0068__cmdname19989125215383">ping 10.1.1.105</span></b></p> <p id="er_01_0068__p1322175362818"><b><span class="cmdname" id="er_01_0068__cmdname19989125215383">ping 10.1.1.105</span></b></p>

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</th> </th>
</tr> </tr>
</thead> </thead>
<tbody><tr id="er_01_0069__row1204132116401"><td class="cellrowborder" valign="top" width="18.221822182218222%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0069__p3204162104012">Region</p> <tbody><tr id="er_01_0069__row7576143114159"><td class="cellrowborder" valign="top" width="18.221822182218222%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0069__p3204162104012">Region</p>
</td> </td>
<td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p1512561372720">Mandatory</p> <td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p1512561372720">Mandatory</p>
<p id="er_01_0069__p1420422134014">Select the region nearest to you to ensure the lowest latency possible.</p> <p id="er_01_0069__p1420422134014">Select the region nearest to you to ensure the lowest latency possible.</p>
@ -81,7 +81,7 @@
<tr id="er_01_0069__row1029510344302"><td class="cellrowborder" valign="top" width="18.221822182218222%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0069__p429614343307">Auto Accept Shared Attachments</p> <tr id="er_01_0069__row1029510344302"><td class="cellrowborder" valign="top" width="18.221822182218222%" headers="mcps1.3.2.2.5.2.1.2.4.1.1 "><p id="er_01_0069__p429614343307">Auto Accept Shared Attachments</p>
</td> </td>
<td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p496473117314">Optional</p> <td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p496473117314">Optional</p>
<div class="p" id="er_01_0069__p105785114337">As the owner, you can share your enterprise router with other users. These other users can create attachments for your enterprise router.<ul id="er_01_0069__ul664122183418"><li id="er_01_0069__li18641224348">If you do not select this option, you must manually accept attachments to this enterprise router from the accounts that this enterprise router is shared with.</li><li id="er_01_0069__li186412022344">If you select this option, the system will automatically accept attachments to this enterprise router from the accounts that this enterprise router is shared with.</li></ul> <div class="p" id="er_01_0069__p105785114337">As the owner, you can share your enterprise router with other users. These other users can create attachments for your enterprise router.<ul id="er_01_0069__ul664122183418"><li id="er_01_0069__li18641224348">If you do not select this option, you must manually accept attachments to this enterprise router from the accounts that this enterprise router is shared with.</li><li id="er_01_0069__li186412022344">If you select this option, the attachments from the accounts that this enterprise router is shared with will be automatically accepted.</li></ul>
</div> </div>
<p id="er_01_0069__p1542917382359">For details, see <a href="er_01_0095.html">Sharing Overview</a>.</p> <p id="er_01_0069__p1542917382359">For details, see <a href="er_01_0095.html">Sharing Overview</a>.</p>
</td> </td>
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</td> </td>
<td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p0209172153117">Mandatory</p> <td class="cellrowborder" valign="top" width="59.27592759275928%" headers="mcps1.3.2.2.5.2.1.2.4.1.2 "><p id="er_01_0069__p0209172153117">Mandatory</p>
<p id="er_01_0069__p1820919213115">Select an enterprise project that the enterprise router will be added to.</p> <p id="er_01_0069__p1820919213115">Select an enterprise project that the enterprise router will be added to.</p>
<p id="er_01_0069__p520919211314">An enterprise project facilitates project-level management and grouping of cloud resources and users. The default project is <strong id="er_01_0069__b9805124619575">default</strong>.</p> <p id="er_01_0069__p520919211314">An enterprise project facilitates project-level management and grouping of cloud resources and users. The default project is <strong id="er_01_0069__b1749038337">default</strong>.</p>
</td> </td>
<td class="cellrowborder" valign="top" width="22.5022502250225%" headers="mcps1.3.2.2.5.2.1.2.4.1.3 "><p id="er_01_0069__p11131124017455">default</p> <td class="cellrowborder" valign="top" width="22.5022502250225%" headers="mcps1.3.2.2.5.2.1.2.4.1.3 "><p id="er_01_0069__p11131124017455">default</p>
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<a name="er_01_0090"></a><a name="er_01_0090"></a> <a name="er_01_0090"></a><a name="er_01_0090"></a>
<h1 class="topictitle1">Interconnecting with CTS</h1> <h1 class="topictitle1">CTS Auditing</h1>
<div id="body0000001189741286"><p id="er_01_0090__p8060118"></p> <div id="body0000001189741286"><p id="er_01_0090__p8060118"></p>
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<li class="ulchildlink"><strong><a href="er_01_0092.html">Viewing Traces</a></strong><br> <li class="ulchildlink"><strong><a href="er_01_0092.html">Viewing Traces</a></strong><br>
</li> </li>
</ul> </ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0022.html">Monitoring and Auditing</a></div>
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<div> <div>
<div class="familylinks"> <div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0090.html">Interconnecting with CTS</a></div> <div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0090.html">CTS Auditing</a></div>
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</div> </div>
<div> <div>
<div class="familylinks"> <div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0090.html">Interconnecting with CTS</a></div> <div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0090.html">CTS Auditing</a></div>
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<a name="er_01_0102"></a><a name="er_01_0102"></a> <a name="er_01_0102"></a><a name="er_01_0102"></a>
<h1 class="topictitle1">Monitoring</h1> <h1 class="topictitle1">Cloud Eye Monitoring</h1>
<div id="body0000001258323989"><p id="er_01_0102__p8060118"></p> <div id="body0000001258323989"><p id="er_01_0102__p8060118"></p>
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<li class="ulchildlink"><strong><a href="er_01_0105.html">Creating Alarm Rules</a></strong><br> <li class="ulchildlink"><strong><a href="er_01_0105.html">Creating Alarm Rules</a></strong><br>
</li> </li>
</ul> </ul>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0022.html">Monitoring and Auditing</a></div>
</div>
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</div> </div>
<div> <div>
<div class="familylinks"> <div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0102.html">Monitoring</a></div> <div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0102.html">Cloud Eye Monitoring</a></div>
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</div> </div>
<div> <div>
<div class="familylinks"> <div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0102.html">Monitoring</a></div> <div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0102.html">Cloud Eye Monitoring</a></div>
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<div> <div>
<div class="familylinks"> <div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0102.html">Monitoring</a></div> <div class="parentlink"><strong>Parent topic:</strong> <a href="er_01_0102.html">Cloud Eye Monitoring</a></div>
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<a name="er_01_0121"></a><a name="er_01_0121"></a> <a name="er_01_0121"></a><a name="er_01_0121"></a>
<h1 class="topictitle1">Why Traffic Can't Be Forwarded from a VPC with a Route Destination of 0.0.0.0/0 to Its Enterprise Router?</h1> <h1 class="topictitle1">Why Traffic Can't Be Forwarded from a VPC with a Route Destination of 0.0.0.0/0 to Its Enterprise Router?</h1>
<div id="body0000001445505812"><div class="section" id="er_01_0121__section47225412498"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="er_01_0121__p0813113973516">Traffic cannot be forwarded from a VPC to the enterprise router that it is attached to if you set the destination of a route in the VPC route table to 0.0.0.0/0 and:<ul id="er_01_0121__ul72041734210"><li id="er_01_0121__li164005461190">An ECS in the VPC has an EIP bound.<div class="note" id="er_01_0121__note5344141544919"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="er_01_0121__p8344151554920">Refer to solution 1.</p> <div id="body0000001445505812"><div class="section" id="er_01_0121__section47225412498"><h4 class="sectiontitle">Scenarios</h4><div class="p" id="er_01_0121__p0813113973516">Traffic cannot be forwarded from a VPC to the enterprise router that the VPC is attached to if you set the destination of a route to 0.0.0.0/0 in the VPC route table and:<ul id="er_01_0121__ul72041734210"><li id="er_01_0121__li164005461190">An ECS in the VPC has an EIP bound.<div class="note" id="er_01_0121__note5344141544919"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="er_01_0121__p8344151554920">Refer to solution 1.</p>
</div></div> </div></div>
</li><li id="er_01_0121__li1780635515916">ELB, NAT Gateway, VPC Endpoint and DCS are deployed in the VPC.<div class="note" id="er_01_0121__note461526184911"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="er_01_0121__p5623263499">Refer to solution 1 or solution 2.</p> </li><li id="er_01_0121__li1780635515916">ELB, NAT Gateway, VPC Endpoint and DCS are deployed in the VPC.<div class="note" id="er_01_0121__note461526184911"><img src="public_sys-resources/note_3.0-en-us.png"><span class="notetitle"> </span><div class="notebody"><p id="er_01_0121__p5623263499">Refer to solution 1 or solution 2.</p>
<p id="er_01_0121__p121559322418">When method 2 is used, if a VPC wants to access public network, the traffic from the VPC is forwarded to the enterprise router and then to the public network. For this reason, if a VPC accesses the public network using an EIP, do not use this method.</p> <p id="er_01_0121__p121559322418">When method 2 is used, if a VPC wants to access public network, the traffic from the VPC is forwarded to the enterprise router and then to the public network. For this reason, if a VPC accesses the public network using an EIP, do not use this method.</p>

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<td class="cellrowborder" valign="top" headers="mcps1.3.1.3.2.5.1.2 "><p id="er_01_0129__p17226482614">In <a href="#er_01_0129__fig536751734919">Figure 2</a>:</p> <td class="cellrowborder" valign="top" headers="mcps1.3.1.3.2.5.1.2 "><p id="er_01_0129__p17226482614">In <a href="#er_01_0129__fig536751734919">Figure 2</a>:</p>
<p id="er_01_0129__p1527292452314">The two service VPCs (VPC-A and VPC-B) are not attached to the enterprise router. Instead, a transit VPC (VPC-Transit) is used. The transit VPC and the Direct Connect virtual gateway are attached to the enterprise router.</p> <p id="er_01_0129__p1527292452314">The two service VPCs (VPC-A and VPC-B) are not attached to the enterprise router. Instead, a transit VPC (VPC-Transit) is used. The transit VPC and the Direct Connect virtual gateway are attached to the enterprise router.</p>
</td> </td>
<td class="cellrowborder" valign="top" headers="mcps1.3.1.3.2.5.1.3 "><ul id="er_01_0129__ul839811401338"><li id="er_01_0129__li5398174083320"> Each service VPC is connected to the transit VPC over a VPC peering connection.</li><li id="er_01_0129__li11956244103315">Direct Connect enables the on-premises data center to access the cloud, and the enterprise router connects the on-premises data center to the two service VPCs.</li></ul> <td class="cellrowborder" valign="top" headers="mcps1.3.1.3.2.5.1.3 "><ul id="er_01_0129__ul839811401338"><li id="er_01_0129__li5398174083320">Each service VPC is connected to the transit VPC over a VPC peering connection.</li><li id="er_01_0129__li11956244103315">Direct Connect enables the on-premises data center to access the cloud, and the enterprise router connects the on-premises data center to the two service VPCs.</li></ul>
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<div class="section" id="er_01_0129__section125661717185015"><a name="er_01_0129__section125661717185015"></a><a name="section125661717185015"></a><h4 class="sectiontitle">How Do I Select a Networking Scheme?</h4><div class="p" id="er_01_0129__p51791713596">In scheme 1, the service VPCs are directly attached to the enterprise router. In scheme 2, a transit VPC is used and attached to the enterprise router. Each service VPC is connected to the transit VPC over a VPC peering connection. Compared with scheme 1, scheme 2 costs less and eliminates some constraints, as detailed below:<ul id="er_01_0129__ul18491182543918"><li id="er_01_0129__li36527386391">Scheme 2 frees you from the following constraints that scheme 1 has on attaching service VPCs to an enterprise router:<ul id="er_01_0129__ul265213823912"><li id="er_01_0129__li96521538163917">If a service VPC is used by ELB, VPC Endpoint, NAT Gateway (private NAT gateways), or DCS, contact customer service to confirm the service compatibility and preferentially use a transit VPC for networking.</li><li id="er_01_0129__li8652738113919">Traffic cannot be forwarded from a VPC to the enterprise router if you set the destination of a route in the VPC route table to 0.0.0.0/0 and:<ul id="er_01_0129__ul465283814396"><li id="er_01_0129__li17652438103917">An ECS in the VPC has an EIP bound.</li><li id="er_01_0129__li0652153843918">The VPC is being used by ELB (either dedicated or shared load balancers), NAT Gateway, VPC Endpoint, and DCS.</li></ul> <div class="section" id="er_01_0129__section125661717185015"><a name="er_01_0129__section125661717185015"></a><a name="section125661717185015"></a><h4 class="sectiontitle">How Do I Select a Networking Scheme?</h4><div class="p" id="er_01_0129__p51791713596">In scheme 1, the service VPCs are directly attached to the enterprise router. In scheme 2, a transit VPC is used and attached to the enterprise router. Each service VPC is connected to the transit VPC over a VPC peering connection. Compared with scheme 1, scheme 2 costs less and eliminates some constraints, as detailed below:<ul id="er_01_0129__ul18491182543918"><li id="er_01_0129__li36527386391">Scheme 2 frees you from the following constraints that scheme 1 has on attaching service VPCs to an enterprise router:<ul id="er_01_0129__ul265213823912"><li id="er_01_0129__li96521538163917">If a service VPC is used by ELB, VPC Endpoint, NAT Gateway (private NAT gateways), or DCS, contact customer service to confirm the service compatibility and preferentially use a transit VPC for networking.</li><li id="er_01_0129__li8652738113919">Traffic cannot be forwarded from a VPC to the enterprise router if you set the destination of a route to 0.0.0.0/0 in the VPC route table and:<ul id="er_01_0129__ul465283814396"><li id="er_01_0129__li17652438103917">An ECS in the VPC has an EIP bound.</li><li id="er_01_0129__li0652153843918">The VPC is being used by ELB (either dedicated or shared load balancers), NAT Gateway, VPC Endpoint, and DCS.</li></ul>
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