Troubleshooting guide

10-6
ATM and Layer 3 Switch Router Troubleshooting Guide
OL-1969-01
Chapter 10 Troubleshooting Ethernet, ATM Uplink, and POS Uplink Interfaces
Troubleshooting General Ethernet Interface Problems
Step 3 Use the show epc queuing and show epc status command to display interface queues and status.
Switch# show epc queuing
INT X-INT VCI QCNT VCI QCNT
Gi0/0/0 Gi1/0/0 67 640 62 0
Gi0/0/0 Gi1/0/0 71 546 66 0
Gi0/0/1 Gi1/0/0 67 135 147 0
Gi0/0/1 Gi1/0/0 69 18 149 0
Gi1/0/0 SRP 35 0 342 1791
Gi1/0/0 Gi0/0/0 62 0 67 640
Gi1/0/0 Gi0/0/0 66 0 71 546
Gi1/0/0 Gi0/0/1 147 0 67 135
Gi1/0/0 Gi0/0/1 149 0 69 18
Gi1/0/0 Gi1/0/1 152 0 67 639
Gi1/0/0 Gi12/0/0 577 0 67 640
Gi1/0/0 Gi12/0/0 578 0 68 16
Gi1/0/0 Gi12/0/0 579 0 69 38
Gi1/0/0 Gi12/0/0 580 0 70 16
Gi1/0/0 Gi12/0/1 662 0 67 640
Gi1/0/0 Gi12/0/1 666 0 71 640
Gi1/0/1 Gi1/0/0 67 639 152 0
Gi12/0/0 Gi1/0/0 67 640 577 0
Gi12/0/0 Gi1/0/0 68 16 578 0
Gi12/0/0 Gi1/0/0 69 38 579 0
Gi12/0/0 Gi1/0/0 70 16 580 0
Gi12/0/1 Gi1/0/0 67 640 662 0
Gi12/0/1 Gi1/0/0 71 640 666 0
Switch# show epc status
Status of GigabitEthernet0/0/0: OK
Status of GigabitEthernet0/0/1: OK
Status of GigabitEthernet1/0/0: not OK
Status of GigabitEthernet1/0/1: OK
Status of GigabitEthernet2/0/0: OK
Status of GigabitEthernet2/0/1: OK
Status of GigabitEthernet12/0/0: OK
Status of GigabitEthernet12/0/1: OK
The show epc queuing command output shows that no activity is going across interface GigabitEthernet
1/0/0. This is verified in the show epc status command output, which indicates that interface
GigabitEthernet 1/0/0 is “not OK.” You have confirmed that the problem is a stuck port.
Note You might see a few cells in the QCNT column in the show epc queuing command output.
That is normal. Enter the command several times to verify that traffic is moving through the
queues. If the QCNT column values are incrementing and incrementing for the VCIs
belonging to a particular interface, the problem is probably a stuck port.
You can remedy the port stuck condition by removing and reinserting the interface module.
A shutdown/no shutdown command sequence on the problem interface does not resolve the problem.
Configuring Automatic Port Stuck Failure Recovery
To recover from a port stuck failure, perform the following tasks:
• Detect port stuck failure.
• Isolate the cell stuck failure.