[c-nsp] NAT timeout

[Brett Looney]

> We have a router configured to work with 2 ISPs, one of
> them through a satelite link. This particular link is
> beeing monitored with a ip sla and track commands. When
> this link fails the default route is deleted automatically
> form the routing table, and the backup default route is
> then installed. We also use automatic nat failover. The
> problem is that some inside servers that always go to
> the same destination IP/PORT get NATed in the moment
> the backup link is up, and when the primary comes up
> they go to the internet with the source address equal
> to the backup outside interface.

We fixed this with an EEM script that reacts to route or track changes and
then executes the "clear ip nat trans *" command to clear the NAT table.

B.