Executing IP Traceroute Though other protocol keywords are available with the traceroute privileged EXEC command, they are not supported in this release. Note Running TDR and Displaying the Results When you run TDR on an interface, you can run it on the active switch or a stack member. To run TDR, enter the test cable-diagnostics tdr interface interface-id privileged EXEC command. To display the results, enter the show cable-diagnostics tdr interface interface-id privileged EXEC command. Redirecting Debug and Error Message Output By default, the network server sends the output from debug commands and system error messages to the console.
If you use this default, you can use a virtual terminal connection to monitor debug output instead of connecting to the console port or the Ethernet management port. Possible destinations include the console, virtual terminals, internal buffer, and UNIX hosts running a syslog server. The syslog format is compatible with 4.3 Berkeley Standard Distribution (BSD) UNIX and its derivatives. Note Be aware that the debugging destination you use affects system overhead. When you log messages to the console, very high overhead occurs. When you log messages to a virtual terminal, less overhead occurs.
Logging messages to a syslog server produces even less, and logging to an internal buffer produces the least overhead of any method. For more information about system message logging, see Configuring System Message Logging . Using the show platform forward Command The output from the show platform forward privileged EXEC command provides some useful information about the forwarding results if a packet entering an interface is sent through the system.
Depending upon the Troubleshooting the Software Configuration Executing IP Traceroute Command Purpose tracetroute mac ip {source-ip-address | source-hostname}{destination-ip-address | destination-hostname} [detail] Displays the Layer 2 path taken by the packets from the specified source IP address or hostname to the specified destination IP address or hostname. Command Purpose traceroute ip host Device# traceroute ip 192.51.100.1 Traces the path that packets take through the network. Troubleshooting the Software Configuration 21