Administrator Guide

Troubleshooting Packet Loss
The show hardware stack-unit command is intended primarily to troubleshoot packet loss.
To troubleshoot packet loss, use the following commands.
•
show hardware stack-unit 0–5 cpu data-plane statistics
•
show hardware stack-unit 0–5 cpu party-bus statistics
•
show hardware stack-unit 0-5 drops unit 0-0 port 1–56
•
show hardware stack-unit 0-5 stack-port 33–56
•
show hardware stack-unit 0-5 unit 0-0 {counters | details | port-stats [detail] |
register | ipmc-replication | table-dump}:
•
show hardware {layer2| layer3} {eg acl |in acl} stack-unit 0-5 port-set 0-0
•
show hardware layer3 qos stack-unit 0-5 port-set 0-0
•
show hardware system-flow layer2 stack-unit 0-5 port-set 0-1 [counters]
•
clear hardware stack-unit 0-5 counters
•
clear hardware stack-unit 0-5 unit 0–0 counters
•
clear hardware stack-unit 0-5 cpu data-plane statistics
•
clear hardware stack-unit 0-5 cpu party-bus statistics
•
clear hardware stack-unit 0-5 stack-port 33–56
Displaying Drop Counters
To display drop counters, use the following commands.
• Identify which stack unit, port pipe, and port is experiencing internal drops.
show hardware stack-unit 0–11 drops [unit 0 [port 0–63]]
• Display drop counters.
show hardware stack-unit drops unit port
Example of the show hardware stack-unit Command to View Drop Counters Statistics
Dell#show hardware stack-unit 0 drops
UNIT No: 0
Total Ingress Drops :0
Total IngMac Drops :0
Total Mmu Drops :0
Total EgMac Drops :0
Total Egress Drops :0
UNIT No: 1
Total Ingress Drops :0
Total IngMac Drops :0
Total Mmu Drops :0
Total EgMac Drops :0
Total Egress Drops :0
Dell#show hardware stack-unit 0 drops unit 0
Port# :Ingress Drops :IngMac Drops :Total Mmu Drops :EgMac Drops :Egress
Drops
1 0 0 0 0 0
2 0 0 0 0 0
3 0 0 0 0 0
4 0 0 0 0 0
5 0 0 0 0 0
6 0 0 0 0 0
7 0 0 0 0 0
8 0 0 0 0 0
Dell#show hardware stack-unit 0 drops unit 0 port 1
--- Ingress Drops ---
Ingress Drops : 30
IBP CBP Full Drops : 0
278
Debugging and Diagnostics