Modifying the router-level router ID

Changing the router ID number in the config>router context causes the new value to overwrite the router ID derive from the system interface address, or the value inherited from the MAC address.

When configuring a new router ID, protocols are not automatically restarted with the new router ID. The next time a protocol is (re) initialized the new router ID is used. An interim period of time can occur when different protocols use different router IDs. To force the new router ID, issue the shutdown and no shutdown commands for each protocol that uses the router ID or restart the entire router.

Use the following CLI syntax to change a router ID.

CLI syntax

config>router# router-id router-id

Example

config>router# router-id 10.10.10.104
config>router# no shutdown
config>router>bgp# shutdown
config>router>bgp# no shutdown

The following example displays the router ID configuration:

ALA-A>config>router# info
#------------------------------------------
# IP Configuration
#------------------------------------------
        interface "system"
            address 10.10.10.104/32
        exit
        interface "to-103"
            address 10.0.0.104/24
            port 1/1/1
        exit
        autonomous-system 100
        router-id 10.10.10.104

#------------------------------------------
ALA-B>config>router#