Configuring an IP Address Pool for Clustering (OSPFv2 and OSPFv3)
You can assign a range of IPv4 addresses for the router ID cluster pool if you are using Layer 3 clustering.
To assign a range of IPv4 addresses for the router ID cluster pool in Layer 3 clustering for OSPFv2 and OSPFv3, enter the following command:
Command
Purpose
router-id cluster-pool hostname | A.B.C.D ip_pool
Example:
hostname(config)# ip local pool rpool 1.1.1.1-1.1.1.4
hostname(config)# router ospf 1
hostname(config-rtr)# router-id cluster-pool rpool
hostname(config-rtr)# network 17.5.0.0 255.255.0.0 area 1
hostname(config-rtr)# log-adj-changes
Specifies the router ID cluster pool for Layer 3 clustering.
The cluster-pool keyword enables configuration of an IP address pool when Layer 3 clustering is configured. The hostname | A.B.C.D. keyword specifies the OSPF router ID for this OSPF process. The ip_pool argument specifies the name of the IP address pool.
Note If you are using clustering, then you do not need to specify an IP address pool for the router ID. If you do not configure an IP address pool, then the ASA uses the automatically generated router ID.
Learning and Thinking 