I've been looking into this some more. Are there any issues which CARP/OpenBGPd when machines in the CARP group do not have an IP address of their own - ie. they have only a shared CARP address?
I find that in this situation, when the CARP master fails the backup router correctly becomes master and re-establishes BGP sessions. However, the CARP shared IP address appears in the routing/arp table bound to the localhost interface. This creates a really nasty routing loop. 'route -n show -inet' gives this line: Dest Gateway Flags Refs Use Mtu Interface 80.x.y.154 00:00:5e:00:01:01 UHLc 1 2 - lo0 If I assign each router an IP address in addition to the CARP shared address, this problem does not appear. Thanks, Charlie
