3Com Switch 8800 Advanced Software V5 Configuration Guide

1026 CHAPTER 79: SYSTEM MAINTENANCE AND DEBUGGING
n
■ For a low-speed network, you are recommended to set a larger value for the
timeout timer (indicated by the -t parameter in the command) when
configuring the ping command.
■ Only the directly connected segment address can be pinged if the outgoing
interface is specified with the -i argument.
System Debugging
n
■ The debugging commands are usually used by administrators in diagnosing
network failure.
■ Output of the debugging information may reduce system efficiency, especially
during execution of the debugging all command.
■ After completing the debugging, you are recommended to use the undo
debugging all command to disable all the debugging functions.
■ You must configure the debugging, terminal debugging and terminal
monitor commands first to display the detailed debugging information on the
terminal. For the detailed description on the terminal debugging and
terminal monitor commands, refer to the Switch 8800 Command Reference
Guide.
System Maintaining
Example
Network requirements
■ The IP address of the destination device is 10.1.1.4.
■ Display the switches a packet traverses from the current device to the
destination device.
Network diagram (omitted here)
Configuration procedure
<Sysname> tracert nis.nsf.net
traceroute to nis.nsf.net (10.1.1.4) 30 hops max, 40 bytes packet
1 128.3.112.1 19 ms 19 ms 10 ms
2 128.32.216.1 39 ms 39 ms 19 ms
To do... Use the command... Remarks
Enable debugging for a
specified module
debugging { all [ timeout
time ] | module-name [ option
] }
Required
Disabled by default
Available in user view
Enable the terminal
monitoring
terminal monitor Optional
The terminal monitoring on
the console is enabled by
default and that on the
monitoring terminal is
disabled by default.
Enable the terminal
debugging
terminal debugging Required
Disabled by default
Available in user view
Display the enabled
debugging functions
display debugging [
interface interface-type
interface-number ] [
module-name ]
Optional
Available in any view