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 10.80.244.1 10.80.247.254 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 10.80.244.190 being nat'd to 10.80.244.157. Was this caused by them running out of NATs? How does IOS handle it when a 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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