Command Reference Guide

3Com Router 3000 Ethernet Family
Command Reference Guide Chapter 9 DHCP Configuration Commands
3Com Corporation
9-25
Description
Use the dhcp server ping command to configure the maximum number of ping
packets that the DHCP server is allowed to send and the longest time period that the
DHCP server should wait for the response to each ping packet.
Use the undo dhcp server ping command to restore the default settings.
To prevent the address collision resulted from repeated IP address allocation, DHCP
server sends ping packets to detect that an address is available.
Example
# Allow the DHCP server to send up to ten ping packets and wait 500 milliseconds (the
default setting) for the response to each packet.
[3Com] dhcp server ping packets 10
9.2.23 dhcp server relay information enable
Syntax
dhcp server relay information enable
undo dhcp server relay information enable
View
System view
Parameter
None
Description
Use the dhcp server relay information enable command to enable the DHCP server
to support option 82.
Use the undo dhcp server relay information enable command to disable the DHCP
server to support option 82.
When enabled to support option 82, the DHCP server can recognize DHCP requests
carrying option 82 and handle the packets according to their sub-options.
At present, the DHCP server can recognize sub-option 5 of option 82 and assign the
client an IP address in the same network segment where the IP address specified by
sub-option 5 is located.
By default, the DHCP server supports option 82.
Example
# Disable the DHCP server to support option 82.
[3Com] undo dhcp server relay information enable