I don't have a lot of information on this problem but I thought I would throw it out there and see if anyone has run into this before. A client is running a multicast application for several of its sites. The multicast server is located in MA and they are running PIM-SM to NY and SF. The problem is on the WAN link to NY, the client machines are receiving errors that indicate lost packets. My question is: Has anyone run into a problem running IPX and IP multicast over the same network? I know this is strange but when they shut down IPX the machines stop generating errors. When they turn IPX back on the errors seem to come back..??? They are running CGMP on the switches in NY. I apologize for the lack of detail but I am not directly working on this, just trying to help out. I was just wondering if anyone has ever heard of this before? Ryan _________________________________ FAQ, list archives, and subscription info: http://www.groupstudy.com/list/cisco.html Report misconduct and Nondisclosure violations to [EMAIL PROTECTED]