Introduction
This document can be used as a cheat-sheet for troubleshooting on Cisco 3750 switches..
Requirements
There are no specific requirements for this document.
Commands
For CPU related issues
Show process cpu sorted
Show process cpu history
Show platform port-asic stats drop
Show controllers cpu-interface
Debug platform cpu-queues <queue name>
Show plat for <src intf> <srcmac> <dstmac> ip <srcip> <dstip> <L4Prot>
For memory issues
Show memory statistics
Show process memory sorted
Show buffers
For link issues
Show interface status | inc connected
Test cable-diagnostics tdr interface <>
Show cable-diagnostic tdr interface <>
Show interface <>
Show interface <> counters
Show interface <> counters errors
Show interface counter errors
Show controller Ethernet-controller <>
Show platform pm if-numbers
Show controllers Ethernet-controller port-asic statistics
Show platform port-asic stats drop <>
Layer 2 forwarding issues
Show interface <> status
Show spanning-tree interface <>
Show interface <> counter
Show mac address-table interface <>
Show mac address-table dynamic address <>
Show spanning-tree vlan <>
Show interface status error-disabled
Show interface <> counter error
Show platform forward <ingress intf> <srcmac> <destmac>
Show spanning-tree vlan <> detail
Layer 3 IP Unicast issues
Ping
Sh ip arp vlan
Show mac address-table address
Show ip route
Show ip arp
Show platform forward <ingress intf> <srcmac> <dstmac> ip <srcip> <dstip>
QOS issues
Show mls qos interface <> stats
Show mls qos map dscp-output-q
Show platform port-asic stats drop
Show mls qos queue-set
Show mls qos maps dscp-output-q
Mls qos queue-set output <> threshold
TCAM issues
Show platform tcam utilization
Show platform acl oacltcamfull
Show platform acl label <> detail
Show sdm prefer
Stacking issues
Show switch {detail}
Show platform stack manager
Show switch stack-ring <>
Show controllers utilization
Show switch stack-ports summary
Related Information
