router id

Use router id to configure a global router ID.

Use undo router id to restore the default.

Syntax

router id router-id

undo router id

Default

No global router ID is configured.

Views

System view

Predefined user roles

network-admin

Parameters

router-id: Specifies a router ID in IP address format.

Usage guidelines

Some routing protocols use a router ID to identify a device. You can configure a global router ID, which is used by routing protocols that have no router ID configured.

If no global router ID is configured, the highest loopback address, if any, is used as the router ID. If no loopback address is available, the highest physical interface IP address is used, regardless of the interface status. If no IP address is configured for any interface, the router ID is 0.0.0.0.

During an active/standby switchover, the standby main processing unit (MPU) checks the validity of the previous router ID backed up before switchover. If it is not valid, it selects a new router ID.

If the interface IP address that is selected as the router ID is removed or modified, a new router ID is selected. The following events will not trigger a router ID re-selection:

• The interface goes down.

• After a physical interface address is selected as the router ID, an IP address is configured for a loopback interface.

• A higher interface IP address is configured.

After a router ID is changed, use the reset command to make it effective.

Examples

# Configure a global router ID as 1.1.1.1.

<Sysname> system-view
[Sysname] router id 1.1.1.1

Related commands

router-id (BGP instance view)

router-id (BGP-VPN instance view)