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New Member

NAT pool is full

I have a connection to an extranet partner where we nat our source addresses to a nat pool and they in turn nat those to a different source for their network. my pool looks like this:

ip nat pool EnterprisePool prefix-length 22

it looks like the nat pool that the extranet partner had was too small to handle our capacity so I started seeing addresses that fell within my nat pool being nat'd to addresses in my nat pool. I would see an address of being nat'd to Was this caused by them running out of NATs? How does IOS handle it when a NAT pool is full?

New Member

Re: NAT pool is full

It may not be of running out of address in pool.

Pls check for the access-list/route-map, which you are using for classifying the criteria using which you are doing NAT.

ex.If you use an access-list "permit ip any any"

may cause this.

New Member

Re: NAT pool is full

Thanks for the info. I did have a permit any any in there and had added rules to deny my NATs from being NAT'd right before I posted my original question. My vendor had also expanded their pool so it's hard to tell what fixed it. My guess is that I filled up the pool by NATing my NATs. I usually only NAT on an outside interface so I hadn't ran into this before.


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