Command Reference Guide

3Com Router 5000 Family and Router 6000 Family dchp select (System view) ● 31
Command Reference
dchp select (System view)
Purpose Use the dhcp select command in System view to select a method for multiple
interfaces in a specified range to dispose the DHCP packets destined to the local
device.
Use the undo dhcp select command in System view to restore the default
setting.
Syntax dhcp select { global [ subaddress ] | interface | relay } { interface
interface-type interface-number [ to interface-type interface-number ]
| all }
undo dhcp select { interface interface-type interface-number [ to
interface-type interface-number ] | all }
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.
interface-type
interface-number [ to
interface-type
interface-number ]
Indicates an interface or all interfaces from the first
specified interface to the second. Note that the
interfaces can be Ethernet interfaces (or subinterfaces),
virtual Ethernet interfaces, synchronous/asynchronous
serial interfaces encapsulated with PPP, HDCL, or frame
relay, or E1 interfaces.
all
All the interfaces.