03-25-2004 06:23 AM - edited 03-02-2019 02:33 PM
The scenario is an atm interface is up and the pvc status is up, but it has dropped from ospf and the circuit is suspected down. Yet the input packets keep incrementing (ex 9430 cells per minute), both INPkts and INPRoc by the same amount.
It seems like the traffic is more than keepalive, besides the ILMI-keepalive is turned off on the main interface.
How can I distinguish whether the cells received are live data from the remote site vs system overhead from the local atm switch? If I could do that, I could confirm that the circuit is the issue. Or is there another way to confirm the circuit is the issue?
03-25-2004 06:30 AM
do you have oam configured on the pvc ? if not put it on both sides , then you will see the pvc go down , the traffic you see is most likely OAM streaming in from the switch
interface ATM0/0.1 point-to-point
pvc 2/401
oam-pvc manage
you can also do this command look at the F5 counters and the status
sh atm pvc 2/401
ATM4/0.401: VCD: 1, VPI: 2, VCI: 401, Connection
VBR-NRT, PeakRate: 155000, Average Rate: 20000, Burst Cells: 1000
AAL5-LLC/SNAP, etype:0x0, Flags: 0x20, VCmode: 0x0
OAM frequency: 10 second(s), OAM retry frequency: 1 second(s), OAM retry frequency: 1 second(s)
OAM up retry count: 3, OAM down retry count: 5
OAM Loopback status: OAM Received
OAM VC status: Verified
ILMI VC status: Not Managed
VC is managed by OAM.
VC TxRingLimit: 786 particles
VC Rx Limit: 1766 particles
InARP frequency: 15 minutes(s)
Transmit priority 4
InPkts: 62881115, OutPkts: 62629010, InBytes: 3433130546, OutBytes: 866896572
InPRoc: 106466, OutPRoc: 106465
InFast: 62774649, OutFast: 62522545, InAS: 0, OutAS: 0
InPktDrops: 0, OutPktDrops: 0/0/0 (holdq/outputq/total)
InByteDrops: 0, OutByteDrops: 0
CrcErrors: 0, SarTimeOuts: 0, OverSizedSDUs: 0, LengthViolation: 0, CPIErrors: 0
Out CLP=1 Pkts: 0
OAM cells received: 75584
F5 InEndloop: 75584, F5 InSegloop: 0, F5 InAIS: 0, F5 InRDI: 0
F4 InEndloop: 0, F4 InSegloop: 0, F4 InAIS: 0, F4 InRDI: 0
OAM cells sent: 75590
F5 OutEndloop: 75590, F5 OutSegloop: 0, F5 OutRDI: 0
F4 OutEndloop: 0, F4 OutSegloop: 0, F4 OutRDI: 0
OAM cell drops: 0
Status: UP
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