I have a router with 2 lan interfaces and 2 loopback addresses. All interfaces show up/up. The router is passing traffic. I can ping all interfaces from a device on either segment. I can ping hosts on both segments from both segments. What I cannot do is ping one of the local interfaces from the router itself. I can ping both loopbacks and one of the interfaces just fine. I have tried directed pings from all of the interfaces to the one that is not working, to no avail. I can do a directed ping from this interface to hosts on either segment. I have tried debugs but due to the volume of traffic on the router I have not had much success. I do not believe this to be applicable but the interface displaying the problem is token-ring, the router is a 3662 and I am going to replace the token ring module to eliminate it. I am just curious to know if anyone else has seen a similar symptom. Thanks.