3com 8807 Guia De Referência
824
C
HAPTER
47: DHCP C
ONFIGURATION
C
OMMANDS
undo dhcp select { interface vlan-interface vlan-id [ to vlan-interface vlan-id ]
| all }
| all }
View
VLAN interface view, system view
Parameter
global: Specifies to forward DHCP packets to local DHCP server and let the local
server assign IP addresses in global address pools to DHCP clients.
server assign IP addresses in global address pools to DHCP clients.
interface: Specifies to forward DHCP packets to local DHCP server and let the
local server assign IP addresses in VLAN interface address pool to DHCP clients.
local server assign IP addresses in VLAN interface address pool to DHCP clients.
relay: Specifies to forward DHCP packets to remote DHCP servers and let remote
servers assign IP addresses to DHCP clients. In this case, the current switch
operates as a DHCP relay.
servers assign IP addresses to DHCP clients. In this case, the current switch
operates as a DHCP relay.
interface vlan-interface vlan-id [ to vlan-interface vlan-id ]: Specifies a VLAN
interface or a range of VLAN interfaces.
interface or a range of VLAN interfaces.
all: Specifies all the VLAN interfaces.
c
CAUTION: The dhcp select interface command cannot be used together with
the ip relay address or dhcp relay security address-check enable command.
Otherwise, the ip relay address command or the dhcp relay security
address-check enable command will not take effect.
the ip relay address or dhcp relay security address-check enable command.
Otherwise, the ip relay address command or the dhcp relay security
address-check enable command will not take effect.
Description
Use the dhcp select command to specify a method used by the switch to process
the DHCP packets it received. You can use this command in VLAN interface view
to specify a processing method of DHCP packets for current VLAN interface, or in
system view to specify a processing method for multiple VLAN interfaces.
the DHCP packets it received. You can use this command in VLAN interface view
to specify a processing method of DHCP packets for current VLAN interface, or in
system view to specify a processing method for multiple VLAN interfaces.
Use the undo dhcp select command to revert to the default processing mode of
DHCP packets.
DHCP packets.
By default, the switch forwards the DHCP packets it received to the local DHCP
server and let the local server assign IP addresses in global address pools to DHCP
clients. (That is, the switch processes the DHCP packets in the global method.)
server and let the local server assign IP addresses in global address pools to DHCP
clients. (That is, the switch processes the DHCP packets in the global method.)
Example
# Specify to forward DHCP packets to the local DHCP server and let the local
server assign IP addresses in global address pools to DHCP clients.
server assign IP addresses in global address pools to DHCP clients.
<SW8800> system-view
System View: return to User View with Ctrl+Z.
[SW8800] interface vlan-interface 1
[3Com-Vlan-interface1] dhcp select global
dhcp server detect
Syntax
dhcp server detect
undo dhcp server detect