many ATM cells and IP packets input, 0 OAM Cells input

Unanswered Question
Jul 11th, 2008

I'm seeing a pvc which is showing ATM cells and IP packets in, but 0 OAM and 0 cells/packets output. Note that there are 2 other pvcs on the BVI and both of them seem to be working fine. This is PA-A3-T3 on 7206 VXR. My understanding is that if no OAM cells are received, then the pvc is down and shouldn't see any packets inbound. What would cause such an issue?

ATM3/0.5181 is down, line protocol is down


MTU 4470 bytes, BW 40704 Kbit, DLY 190 usec,

reliability 255/255, txload 61/255, rxload 15/255

Encapsulation ATM

32792 packets input, 2320868 bytes

0 packets output, 0 bytes

65584 cells input, 0 cells output

0 OAM cells input, 2946 OAM cells output

AAL5 CRC errors : 0

AAL5 SAR Timeouts : 0

AAL5 Oversized SDUs : 0

Last clearing of "show interface" counters 08:08:43

interface ATM3/0.5181 point-to-point

bridge-group 44

pvc 5/181

ubr 1536

oam-pvc manage

encapsulation aal5snap



I have this problem too.
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Paolo Bevilacqua Sat, 07/12/2008 - 00:44


The interface itself it's down.

As you mentioned, once it's up, the PVC should remain down due to no response to OAM.


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