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IP NAT on Routers

Does anyone know the answers to the following:

I'm running NAT on a cisco 7206 (NPE225) with 12.1(13) image.

1) what is the maximum number of concurrent network address translation (NAT) operations on a router?

2) what is the default timeout dynamic translations WITH overload?

any supporting documentation would be great!

Thanks

1 REPLY
Silver

Re: IP NAT on Routers

Hi

1)The NAT session limit is bound by the amount of available DRAM in the router. Each NAT translation consumes about 160 bytes in DRAM. As a result, 10,000 translations (more than would generally be handled on a single router) can consume about 1.6 MB. Therefore, a typical routing platform has more than enough memory to support thousands of NAT translations.

2) 5 minutes for UDP

60 seconds for DNS

24 hours for TCP

Hope this helps

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