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enterprise-router/umn/source/routes/route_overview.rst
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er_01_0040.html

Route Overview

What Is a Route?

Routes are used to forward packets. A route contains information such as the destination, next hop, and route type.

You can create a propagation for attachments to automatically propagate routes to route tables or manually add static routes to route tables.

Figure 1 Propagated routes and static routes
Table 1 Route types
Route Type Description How to Create Description
Propagated routes Propagated routes are routes that attachments propagate to the route tables of the enterprise router. They cannot be modified or deleted. To create a propagation, see Creating a Propagation for an Attachment in the Route Table <er_01_0036>.

Routes are classified into propagated routes and static routes. The routes shown in Figure 1 <er_01_0040__fig2088721517588> are described as follows:

  • Propagated routes are from:
    • Propagations automatically created in the default route table of the enterprise router for attachments, such as VPC 1, VPC 2, and virtual gateway 1 attachments.
    • Propagations manually created in the custom route table of the enterprise router for attachments, such as VPC 1, virtual gateway 1, and virtual gateway 2 attachments.
  • Static routes are manually added to the custom route table of the enterprise router for attachments, such as VPC 3 and VPC 4 attachments.
Static routes Static routes are manually created and can be modified or deleted. To create a route, see Creating a Static Route <er_01_0041>.

Route Priority

If there are multiple routes with the same destination but different targets in a route table, the route priority is as follows:

Static route > propagated route for VPC attachment > propagated route for virtual gateway attachment route

Note

  • Static routes are manually configured and the destination of each static route must be unique in a route table.
  • Propagated routes are automatically learned by the system and may have the same destination in a route table.
  • A static route and a propagated route may have the same destination in a route table.