3Com Switch 8800 Family Configuration Guide

838 CHAPTER 72: SYSTEM MAINTENANCE AND DEBUGGING

When using the display diagnostic-information command to keep track of the

switch, you should execute the command at least twice so that you can compare

the information for locating problems.

Testing Tools for

Network Connection

ping The ping command can be used to check the network connectivity and host

reachability.

Perform the following configuration in any view.

The output of the command includes:

■ The response to each ping message. If no response packet is received when the

timer expires, "Request time out" information appears. Otherwise, the data

bytes, the packet sequence number, TTL, and the round-trip time of the

response packet will be displayed.

■ The final statistics, including the number of sent packets, the number of

received packets, the packet loss ratio, the round-trip time in its minimum

value, mean value and maximum value.

quick-ping enable Use the quick-ping enable command to enable the ping distribution function.

Use the undo quick-ping enable command to disable the ping distribution

function.

Perform the following configuration in system view.

By default, the PING distribution function is enabled.

Tabl e 803 Display diagnostic information

Operation Command

Display diagnostic information display diagnostic-information

Tabl e 804 Execute the ping command

Operation Command

Support IP ping

ping [ ip ] [ -a ip-address | -c count | -d | - f |

-h ttl | -i {interface-type interface-number } | -n

| -tos tos | -v | -vpn-instance

vpn-instance-name ]* host

Tabl e 805 Enable/disable the PING distribution function

Operation Command

Enable the PING distribution function quick-ping enable

Disable the PING distribution function undo quick-ping enable