3com S7906E Guide De Référence

 

1-24 

router id router-id 

undo router id 

System view 

2: System level 

router-id: Router ID, expressed as an IPv4 address. 

Use the router id command to configure a router ID. 

Use the undo router id command to remove the router ID.  

By default, no router ID is configured. 

Some routing protocols use a router ID to identify a routing device. A route ID is selected in the following 

sequence: 

z 

Select the router ID configured with the router id command; 

z 

Select the highest IP address among loopback interfaces as the router ID: 

z 

If no loopback interface IP address is available, the highest IP address among physical interfaces 

is selected as the router ID (regardless of the interface state). 

z 

If the interface whose IP address is the router ID is removed or modified, a new router ID is 

selected. Other events, (the interface goes down; after a physical interface’s IP address is selected 

as the router ID, an IP address is configured for a loopback interface; a higher interface IP address 

is configured) will not trigger a router ID re-selection. 

A VPN instance selects a router ID among interfaces belonging to it according to the preceding 

procedure. 

When a master/backup switchover occurs, the backup device selects a router ID according to the 

preceding procedure.  

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

# Configure a router ID. 

<Sysname> system-view 

[Sysname] router id 1.1.1.1 

reset ip routing-table statistics protocol [ vpn-instance vpn-instance-name ] { all | protocol }