NAT configuration with ASA 7.2 ISP failover

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Apr 28th, 2007
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I have configured our ASA with interface tracking for multiple ISPs. The failover works fine, but no host on the inside can access the Internet once the failover to ISP B happens due to NAT issues. Our primary ISP which I will call ISP A has a class C address range. Our backup ISP which I will call ISP B just has a single IP. I have static and dynamic NATs for all of our hosts which translate to public IPs for ISP A. How do I configure my ASA to NAT the traffic once the ISP failover goes to ISP B? The interface for ISP A is a point to point with the provider and the class C address range is just NATed out that interface. Any help would be appreciated.

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