Cisco Catalyst 4000 series Hardware Troubleshoot page 18

show Command Descriptions
These table breaks down what show commands are used to help troubleshoot the different symptom types.
Connectivity
Problems System/Supervisor/Module
show version
show config
show module
show system
show port
capabilities show
port <mod/port>
show
Mac<mod/port>
show counters
<mod/port>
clear counters
show version show module
show cdp
show flash show config
neighbors detail
show test 0 show system
show spantree
show time show logging
summary
buffer 1023 show proc CPU
or Ps −c show mbuf all
Capture these show commands that depends on your symptom(s).
(hidden) show nvramenv 1
(hidden) show interposition
Notice that many of the commands in each previous symptom category overlap. This is because the same
1 (hidden)
symptom can occur in different levels of severity; one can cause a performance issue and the other can cause a
crash.
Notice also that some of the commands seem meant more for software troubleshooting or configuration
problems. For instance, the show spantree summary command shows which VLANs run STP, how many
ports are in each VLAN, if any ports on the switch are blocking, and for which VLANs that they are blocking.
Since STP loops can actually bring down a switch or network that gives the appearance of a hardware failure,
this is vital information to capture, whether troubleshooting hardware or software.
show version
This command verifies the version of software you are running. This command also has information about the
size of Flash and DRAM. This is useful information should you need to upgrade. If an upgrade is required,
always check the release notes first. Refer to the to Catalyst 4500 Family Release Notes and choose the
version you need to upgrade. For example, choose the Release Notes for Catalyst 4000 Family Software
Release 5.x and search on any information in regards to your hardware.
Refer to Table 2−82: show version Command Output Fields for more information.
Cat4000−c> (enable) show version
WS−C4006 Software, Version NmpSW: 6.3(1)
Copyright (c) 1995−2001 by Cisco Systems, Inc.
NMP S/W compiled on Jul 24 2001, 12:55:29
GSP S/W compiled on Jul 24 2001, 10:36:29
System Bootstrap Version: 5.4(1)
Hardware Version: 2.0
Problems Resets/Crashes
show log show
logging buffer
1023 show
version show
test 0 show
system show
tech support
ps−c (multiple
times) (hidden)
show mbuf all
(hidden) show
nvramenv 1
(hidden) show
interposition 1
(hidden)
Model: WS−C4006
Supervisor
Serial #: JAB04380209