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Cheat-sheet for Catalyst 3750

 

 

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

Version history
Revision #:
2 of 2
Last update:
‎08-23-2017 11:35 PM
Updated by:
 
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