After upgrading to 9.0(3) from 8.4(6), I noticed the standby firewall was not receiving the "ip address" statement for the outside interface from the primary, even after a force resync. After applying the statement on the standby manually, it began responding again. I performed the failover, and the same thing happened on the primary (formally active) firewall after arriving at 9.0(3). Once again I applied the workaround on the standby appliance and it began working. If I reload the standby, it will boot with no outside interface IP address (even after making sure I do a wr mem).
After fiddling with it a bit, if I (re)apply the "ip address" statement on the interface config of the ACTIVE unit, i get the following message:
ip address x..x.236.210 255.255.255.240 standby x.x.236.211
ERROR: Failed to apply IP address to interface Ethernet0/0, as the network overlaps with interface Virtual254. Two interfaces cannot be in the same subnet.
What is this Virtual254 interface? Are there any workarounds/remedies for this? Google did not help me on this one.
