from the switch:view the mac address table to verify the interface connected to the device.then run show vlan, paying attention to the interfaces that are attached to the server and the client.

Are the server and the client on the same VLAN?  If not, is there a router involved, or is the switch doing Layer 3?

i don't know that the ospf configs mean anything for failover, but the idea of ospf is that if you lose a router (or firewall if it is running ospf), you have a good route to any needed destination using the remaining routers.Failover is designed to ...

Can you describe the way the manual failover should work?Is there any failover currently configured between the firewalls?Is the OSPF on the firewalls?

short answer:  try to get another public ip so that A and B don't have to share.longer answer:i may be off base, but you might be confusing the nat when you attempt to translate two different private ip's to the same public ip on all ports.  if you n...