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Qin Ying, Fan 27d1dd170a eip umn 102606 
Reviewed-by: gtema <artem.goncharov@gmail.com>
Co-authored-by: Qin Ying, Fan <fanqinying@huawei.com>
Co-committed-by: Qin Ying, Fan <fanqinying@huawei.com>
2022-10-31 11:19:24 +00:00

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Can I Bind Multiple EIPs to an ECS?

Scenarios

You can bind multiple EIPs to an ECS. However, this configuration is not recommended.

To bind multiple EIPs to an ECS, you must manually configure routes.

Configuration Example

Table 1 lists ECS configurations.

Table 1 ECS configurations

Parameter

Configuration

Name

ecs_test

Image

CentOS 6.5 64bit

EIP

2

Primary NIC

eth0

Secondary NIC

eth1

Example 1:

If you are required to access public network 11.11.11.0/24 through standby NIC eth1, perform the following operations to configure a route:
  1. Log in to the ECS.
  2. Run the following command to configure a route:

    ip route add 11.11.11.0/24 dev eth1 via 192.168.2.1

    In the preceding command, 192.168.2.1 is the gateway IP address of standby NIC eth1.

Example 2:

Based on example 1, if you are required to enable routing for default public network traffic through standby NIC eth1, perform the following operations to configure a route:

  1. Log in to the ECS.
  2. Run the following command to delete the default route:

    ip route delete default

    Exercise caution when deleting the default route because this operation will interrupt the network and result in SSH login failures.

  3. Run the following command to configure a new default route:

    ip route add 0.0.0.0/0 dev eth1 via 192.168.2.1

    In the preceding command, 192.168.2.1 is the gateway IP address of standby NIC eth1.