[c-nsp] NAT/PAT question

[Oliver Boehmer (oboehmer)]

> 
> We have 7206VXR running IOS 12.3(14)T. It is configured to run
> PAT (NAT overload). We have nat pool range from x.y.z.64 to
> x.y.z.254. But, problem I see is that only first address is always
> used for PAT translations. Is there any way to make PAT use all ip
> address in pool. Here is part from running-config:

PAT algorithm is documented at
http://www.cisco.com/en/US/tech/tk648/tk361/technologies_q_and_a_item091
86a00800e523b.shtml#Q14

It confirms your observation.

> So, my question is: why only one ip address is always allocated?
> What can be done to make PAT use all ip address in pool randomly?
> I've looked through cisco documentation but couldn't find anything.
> Since users are PAT-ed through one ip address in pool it makes quite
> a big problem. 

Why so? What is the problem you're experiencing? CEF load-sharing could
be an issue..

	oli