I have an ATM interface configured into a 6509 running MSFC-E with an ATM card on it. I can not see any packet dropping, but I have users complaining about that when they trace directly over the 6509. The other side we havea Cisco 7609 with ATM card on it. On each side the Cisco is connected to a Nortel Passport 7K
Is there any specific configuration or problem reported with this set up.