Cisco N5K-M1600 - Expansion Module - 6 Ports Troubleshooting Manual page 21

Chapter 1 Troubleshooting Overview
S e n d d o c u m e n t c o m m e n t s t o n e x u s 5 k - d o c f e e d b a c k @ c i s c o . c o m .
switch# debug logfile CiscoLive_debugs
switch# show debug
Display debugging to the screen with the following command:
switch# show debug logfile CiscoLive_debugs
Copy the debug file from MDS to a server with the copy command. When you enter the VRF, if none is
specified then the default is used.
switch# copy log:CiscoLive_debugs tftp:
Enter vrf: management
Enter hostname for the tftp server: 10.91.42.134
Trying to connect to tftp server......
Connection to Server Established.
|
TFTP put operation was successful
To delete the debug logfile, use one of the following commands:
switch# clear debug-logfile CiscoLive_debugs
switch# undebug all
If you do not use one of these commands, the debug logfile will be cleared and overwritten when the
next debug logfile is created. The system only allows one debug logfile to exist.
Debugs to the Direct Telnet Window
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Cisco Discover Protocol
Cisco Discover Protocol (CDP) version 2 is applied to the physical Ethernet interface and only works
when enabled at both ends of the link. LLDP standard is derived from CDP.
CDP is used to verify proper connectivity to correct network devices, very useful at switch deployment.
The following example shows the arguments that can be used with the show CDP command:
switch# show cdp
all
entry
global
interface
neighbors
traffic
switch# show cdp global
Global CDP information:
OL-25300-01
Use a Telnet, SSH, or console application that captures the expected output to buffer or file.
Undebug all or no debug of a specific debug command is required to turn trace off.
The debugs are not persistent across reboots
Most debugs are easy to read and understand, but some are not.
Show interfaces that are CDP enabled
Show CDP entries in database
Show CDP global parameters
Show CDP parameters for an interface
Show CDP neighbors
Show CDP traffic statistics
CDP enabled globally
Sending CDP packets every 60 seconds
Sending a holdtime value of 180 seconds
Sending CDPv2 advertisements is enabled
Sending DeviceID TLV in Default Format
Fabric Manager Tools and CLI Commands
Cisco Nexus 5000 Series Troubleshooting Guide
1-13