Hello mates!
CP recommends when configuring OSPF, set a loopback interface different from 127.0.0.1 ... If we have a ClusterXL, we can set the same @ip in a new loopback interface on both firewalls and set this ip as Router ID or we must maintain the default configuration? Thanks in advance!
The Router ID should be configured to one of the cluster IP addresses.
It should be configured this way on all cluster members.
This is explicitly stated here: OSPF on Gaia