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

reachonenetadm
Level 1
Level 1

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

Hardware is ENHANCED ATM PA

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

TIA,

Chris

2 Replies 2

paolo bevilacqua
Hall of Fame
Hall of Fame

Hi,

The interface itself it's down.

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

sorry, i don't understand. How does a down/down interface receive packets?

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