We have 2 identical PIX 515e firewalls. We manually switch the cables from the active PIX to the standby PIX for maintenance. Whenever we do this, we lose internet connectivity.
The inside interface of the PIX is connected to a 2651 router.
When this happens I can ping from the router to the inside of the PIX, I can ping from the PIX to the internet but I cannot ping from the router to the PIX. This happens for around 15-20 minutes and then *magically* everything starts working.
I've tried clear xlate on the PIX and clear arp-cache on the router. I've shut down interfaces on the router and reloaded the PIX.
What is happening and how do I fix it?