2621 problem with serial interface on WIC 1DSU-T1

[wdaniel]

Hi all,

I have a 2621 with 4 serial interfaces. 1 interface, serial0/0 has always been down. s0/1, s1/0, and s1/1 have always been up. Testing with TelCo has now brought up s0/0, but now s0/1 is down.

I don't physically think there is a problem with the circuit. I suspect there is something else going on.

On the local side, when I sh ip int brief, the serial interface shows "up, down", but the remote side show "down, down".

When Telco loops back, or when I loop back the local or remote sides, I see the state change from "up, down" to "down down".

When I phyically remove the circuit, also see the state change from "up, down", to "down, down".

I see green connection "CD" light, although the WIC has an amber light and is in alarm "AL".

Has anyone seen this problem on image c2600-ipbase-mz.123-6.bin? Or anyone know of problems with a 2621 with for T1 WICs/serial interfaces?

Any help or ideas would be appreciated.

Many thanks,

Warren

[wdaniel]

Also, the down s0/1 in question, will flap up and down throughout the day. Traffic was traversing this interface just fine, but now is down, and shows output packets, but only input errors, no input packets (presently admin down'd):

Serial0/1 is administratively down, line protocol is down

Hardware is PQUICC with Fractional T1 CSU/DSU

Description: Circuit ID: DHZA540606

Internet address is 10.1.252.129/30

MTU 1500 bytes, BW 1544 Kbit, DLY 20000 usec,

reliability 248/255, txload 1/255, rxload 1/255

Encapsulation PPP, LCP Closed, loopback not set

Last input 02:41:40, output 01:00:31, output hang never

Last clearing of "show interface" counters 01:09:07

Input queue: 0/75/0/0 (size/max/drops/flushes); Total output drops: 0

Queueing strategy: weighted fair

Output queue: 0/1000/64/0 (size/max total/threshold/drops)

Conversations 0/2/256 (active/max active/max total)

Reserved Conversations 0/0 (allocated/max allocated)

Available Bandwidth 558 kilobits/sec

5 minute input rate 0 bits/sec, 0 packets/sec

5 minute output rate 0 bits/sec, 0 packets/sec

0 packets input, 0 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 0 giants, 0 throttles

8794690 input errors, 69 CRC, 5616308 frame, 0 overrun, 0 ignored, 3178313 abort

30 packets output, 420 bytes, 0 underruns

0 output errors, 0 collisions, 9 interface resets

0 output buffer failures, 0 output buffers swapped out

0 carrier transitions

DCD=up DSR=up DTR=down RTS=down CTS=up

Thanks all,

Warren