I don't see "no crypto isakmp nat-traversal" in my config, but I also don't see "isakmp nat-traversal" in my config either. Most times, the default doesn't show up in the running config, so I have a question. I have 8.0(4) on a 5520 that we use for VPN, and it has about 250 sessions on it at all times. I have ONE problem with newer versions of a Verizon aircard that has a Gobi 2000 chipset. I know that Cisco doesn't support Windows 7 and the VPN client on a WWAN card, but the problem seems to act like nat-traversal isn't enabled. The user can connect, get an address from the ASA, but then they can't pass traffic at all. My next step was to manually configure nat-traversal, but I want to make sure that they existing sessions won't drop. Has anyone done this in a running environment before, and did you drop sessions?
On a side note, has anyone been able to get these Gobi 2000 cards to work? They're running the latest VPN client on Windows 7. (184.108.40.206?)