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7206VXR/PA-T3+/Frame-Relay PVC Status Keeps Changing

We're seeing all PVC's drop and then reappear in less than a minute on our frame-relay T3. Verizon is seeing the T3 drop also, but can't find a problem - they've tested up to the demarc, and everything appears to be fine (so they say - we've all been here before, haven't we??) Is there a way we can test the T3 interface in our 7206 to prove that the interface is or is not a part of the problem. Interface statistics appear fine, but the PVC's keep changing...very high carrier transition count looks suspect and points to Verizon.

Any comments?

Serial3/0 is up, line protocol is up

Hardware is M1T-T3+ pa


MTU 1500 bytes, BW 44210 Kbit, DLY 200 usec,

reliability 255/255, txload 5/255, rxload 2/255

Encapsulation FRAME-RELAY IETF, crc 16, loopback not set

Keepalive set (10 sec)

LMI enq sent 49821, LMI stat recvd 49768, LMI upd recvd 0, DTE LMI up

LMI enq recvd 48, LMI stat sent 0, LMI upd sent 0

LMI DLCI 0 LMI type is ANSI Annex D frame relay DTE

FR SVC disabled, LAPF state down

Broadcast queue 0/4096, broadcasts sent/dropped 2035223/0, interface broadcasts 1802445

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

Last clearing of "show interface" counters 5d22h

Queueing strategy: fifo

Output queue 0/40, 12099 drops; input queue 0/75, 0 drops

5 minute input rate 496000 bits/sec, 397 packets/sec

5 minute output rate 937000 bits/sec, 355 packets/sec

70467825 packets input, 1993888542 bytes, 0 no buffer

Received 0 broadcasts, 0 runts, 332 giants, 0 throttles

0 parity

1582 input errors, 1582 CRC, 0 frame, 0 overrun, 554 ignored, 0 abort

68073515 packets output, 1811138611 bytes, 0 underruns

0 output errors, 0 applique, 0 interface resets

0 output buffer failures, 0 output buffers swapped out

652 carrier transitions

rxLOS inactive, rxLOF inactive, rxAIS inactive

txAIS inactive, rxRAI inactive, txRAI inactive

interface Serial3/0

mtu 1500

bandwidth 44210

no ip address

encapsulation frame-relay IETF

no ip mroute-cache

framing c-bit

cablelength 400

dsu bandwidth 44210

frame-relay traffic-shaping

frame-relay lmi-type ansi

frame-relay broadcast-queue 4096 256000 2048

frame-relay qos-autosense



Re: 7206VXR/PA-T3+/Frame-Relay PVC Status Keeps Changing

What code are you running. We have run it to problems with the DS3 port adapters and carrier transitions.

Do you see any errors on the CSU ?

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