I'm having a problem with a 2621 router doing NAT overload. At times PPTP connections through the router timeout. Although the NAT Translation table shows the intial connection on tcp port 1723, and an incoming GRE connection attempt, the clients still timeout. There are 10 addresses in the NAT pool, but the translation table never goes beyond two or three addresses, even when there are 10+ clients making outbound connections.
So, my question is, could this be a NAT timeout issue? There doesn't appear to be any timeout value set as the table still has entries from yesterday. Or, is there a way to use overload without having it go into PAT mode right off the bat? If I could set up the NAT to work similar to like how I have it configured on a PIX, where it first does one to one NAT until it gets to the last address in the pool, then does PAT.
Or, is there something else at play here? The router has 32megs of memory and is running IOS verison 12.2(10b). It's not under heavy usage when the problems occur (10-12 outbound NAT'd connections at most).
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Introduction Featured Speakers Luis Espejel is the Telecommunications
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