Router Id - Alcatel-Lucent 7210 SAS M Configuration Manual

Router ID

The router ID, a 32-bit number, uniquely identifies the router within an autonomous system (AS).
In protocols such as OSPF, routing information is exchanged between areas, groups of networks
that share routing information. It can be set to be the same as the loopback address. The router ID
is used by both OSPF and BGP routing protocols in the routing table manager instance.
There are several ways to obtain the router ID. On each 7210 SAS M, X router, the router ID can
be derived in the following ways.
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7210 SAS M, X Router Configuration Guide
Define the value in the config>router router-id context. The value becomes the router ID.
Configure the system interface with an IP address in the config>router>interface ip-int-
name context. If the router ID is not manually configured in the config>router router-id
context, then the system interface acts as the router ID.
If neither the system interface or router ID are implicitly specified, then the router ID is
inherited from the last four bytes of the MAC address.
The router can be derived on the protocol level.
IP Router Configuration
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