Troubleshooting guide

10-4
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
Troubleshooting Port Stuck Problems
If one or more Fast Ethernet or Gigabit Ethernet ports are not transmitting cells, then the failure might
be a port stuck problem.
Follow these steps to troubleshoot a port stuck problem:
Step 1 Use the show switch fabric command to display the activity in the switch processors.
Note Be sure to use the show switch fabric command during the lightest possible traffic conditions
because actual traffic might be using the memory buffers.
Switch# show switch fabric
<Information deleted>
MMC Switch Fabric (idb=0x60CF1788)
Key: Rej. Cells - # cells rejected due to lack of resources
or policing (16-bit)
Inv. Cells - # good cells that came in on a non-existent conn.
Mem Buffs - # cell buffers currently in use
RX Cells - # rx cells (16-bit)
TX Cells - # tx cells (16-bit)
Rx HEC - # cells Received with HEC errors
Tx PERR - # cells with memory parity errors
MSC# Rej. Cells Inv. Cells Mem. Buffs Rx Cells Tx Cells Rx HEC Tx PErr
----- ----------- ------------ ----------- ----------- ---------- ---------- ----------
MSC 0: 389023 7896 14177 0 0 0 0
MSC 1: 0 32709 2070 0 0 0 0
MSC 2: 0 0 0 0 0 0 0
MSC 3: 0 0 0 0 0 0 0
MSC 4: 0 0 0 0 0 0 0
MSC 5: 0 0 0 0 0 0 0
MSC 6: 0 6170 1351 0 0 0 0
MSC 7: 0 9624 1280 0 0 0 0
Switch Fabric Statistics
Rejected Cells: 389023
Invalid Cells: 56399
Memory Buffers: 18878
Rx Cells: 0
Tx Cells: 0
RHEC: 0
TPE: 0
Note The show switch fabric command clears the counters after it displays. Entering the
command again shows the current activity on the switch router.