I am using SuSE 9.3 as a central bridge router between several corporate subnets. It is not running any type of firewall (yes I'm sure!) and I'm using static routes. As a general overview, this router locally has 6 LANs, 192.168.0.0 through 192.168.5.0. The 5 LAN is a token ring lan and the others are ethernet. When I am on the 5 LAN, I can ping everything on my network. From any of the ethernet LANs, I can ping the 5 Lan interface, but nothing beyond it. I've tried switching cables, redoing the routing table several times, double checked DNS, tried all the standard diagnostic programs, but nothing will lead me to any fixes or even hints. I'm stumped.

I haven't tried replacing the token ring card because this bridge cannot be taken down long enough to do it. Is there anything else anyone would try before I piss everyone off and take down the router for a card replacement?

Since ping involves a round trip, if it works from A to B, the only thing that could stop it working from B to A is a firewall rule or client configuration that blocks ICMP echo requests or replies.

Apparently not. I assure you neither is the case here. This is a router only. Any non-local subnet is firewalled via PIX 525's.

The 0, 1, 2, & 5 LANs are trusted local LANs with absolutely no firewalling between them.

Have you tried using ethereal to follow a ping packet through the network? That way you can find where the chain breaks

I mentioned in the original post that it "breaks" at the 5 LAN interface, yet when I ping from the 5 LAN everything works. Being that there is no firewalling and my routing tables are simply static, it makes little since to me. I can only assume the interface is having some type of issue.

The 5 LAN is going to be removed shortly so I can live with it until then.