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Fast Eth status up line protocol down

We have a Cisco 3640 with NM-2FE2W installed in slot 2. FAST 2/0 was configured for IP, connected to a cisco 4006 and working fine. Users reported that the network was down. SHOW IP INT BRIEF showed the module status up but line protocol down. We tried different cables, different ports on the 4006, shut/noshut the interface and reloaded the router with no success. Moved to FAST 2/1 (same cable and 4006 port) and it works fine. Do we have a hardware problem with this FE port? Suggestions for further debug?


Re: Fast Eth status up line protocol down

You could have a hardware problem, but also

look at the output of interface fast 2/0 to see if you don't have

an interface hang at output or drop on input

Last input never, output 00:00:07, output hang never

Input queue: 0/75/0/0 (size/max/drops/flushes).

A speed mismatch might also be a reason so i suggest

you set the speed on both the CAT and Router interface manually to

100MB/s and full duplex.

If all fail, please swapout the FE card.