CartIn today’s techtorial we will be looking at a common way to utilize NAT in order to accomplish a given task we might be asked to do in the lab. Take a look at the below diagram to get an idea of the topology.
One of the functions in IOS 12.4T is support for high availability NAT, to enable a pair of HSRP routers both running NAT to maintain state information and share it about both static and dynamic NAT translations. This means that should the active HSRP router fail, the standby router can continue to allow existing NAT sessions to succeed by already having the translation information passed to it by the active HSRP router.
What I’m going to show below is a simple setup for this scenario. Full configuration for each router (and the Catalyst switch) is available for download at the end of the post (so you can test it yourself).
Tags: CCIE Security, HSRP, NAT