Troubleshooting guide

10-2
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
Follow these steps to troubleshoot cell stuck problems:
Step 1 Under the lightest possible traffic, enter the show switch fabric command on the switch router to clear
the counters.
Switch# show switch fabric
<Information deleted>
MMC Switch Fabric (idb=0x61DD8F0C)
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: 0 110018 0 0 0 0 0
MSC 1: 0 231044 0 0 0 0 0
MSC 2: 0 234283 0 0 0 0 0
MSC 3: 0 232492 0 0 0 0 0
MSC 4: 0 242004 0 0 0 0 0
MSC 5: 0 120995 345 0 0 0 0
MSC 6: 0 111466 0 0 0 0 0
MSC 7: 0 334398 0 0 0 0 0
Switch Fabric Statistics
Rejected Cells: 0
Invalid Cells: 1616700
Memory Buffers: 345
Rx Cells: 0
Tx Cells: 0
RHEC: 0
TPE: 0
<Information deleted>
The show switch fabric command clears the counters after it displays. Entering the command again
shows the current activity on the switch router.
Step 2 Enter the show switch fabric command again to show new activity.
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