I'm finding a discrepancy between PIX (version 6.3(3)) and ASA (version 7.0(5)):
I use a static NAT statement to map a public IP address to an internal IP address:
static (inside,outside) 67.67.67.67 10.0.0.1 netmask 255.255.255.255
In the event of a server failure (i.e. 10.0.0.1), another server changes this NAT statement to:
static (inside,outside) 67.67.67.67 10.0.0.2 netmask 255.255.255.255
and performs a 'clear xlate' to immedidately start routing traffic from 10.0.0.1 to 10.0.0.2. I am finding the PIX (version 6.3(3)) is dropping all other connections immediately after the 'clear xlate' is ran, whereas the ASA (version 7.0(5)) maintains existing connections, but begins mapping all new connections to the new server. I prefer the ASA behavior for my application (since sometimes I perform simulated failover and I want the existing connections to remain in place) and am wondering if there is a setting within the PIX to achieve the same results.