Command Reference Guide

3Com Router 5000 Family and Router 6000 Family dchp select (Interface view) ● 29
Command Reference
dchp select (Interface view)
Purpose Use the dhcp select command in Interface view to select a method for disposing
the DHCP packets destined to the local device.
Use the undo dhcp select command in Interface view to restore the default
setting.
Syntax dhcp select { global [ subaddress ] | interface | relay }
undo dhcp select
Parameters global
The address DHCP client gets is the one selected by the
local DHCP server from a global address pool upon the
receipt of the DHCP request from the client.
subaddress
Enables subaddress allocation, allowing the DHCP
server to assign a DHCP client an IP address belonging
to a subaddress segment for the Ethernet interface.
This IP address is selected from the global address pool
corresponding to the subaddress segment. When
subaddress allocation is enabled, the Ethernet
interface on the DHCP server must be assigned a
subaddress located in the subaddress segment from
which subaddresses are selected for DHCP clients. This
is to ensure that the main address and the subaddress
assigned to a DHCP client are located in different
network segments.
interface
The address DHCP client gets is the one selected by the
local DHCP server from an interface address pool upon
the receipt of the DHCP request from the client.
relay
The address DHCP client gets is allocated by an
external DHCP server.
Default By default, DHCP packets destined to the local device will be sent to the internal
server and the clients sending them will be allocated with addresses selected from a
global address pool (in global approach).
Example Allocate addresses selected from an interface address pool on the internal DHCP
server to the clients sending DHCP packets destined to the local device.
[3Com-Ethernet1/0/0] dhcp select interface
View This command can be used in the following views:
■ Interface view