Manual

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246
DCHP message as “replace”.
ip dhcp relay information option
subscriber-id {standard | <circuit-id>}
no ip dhcp relay information option
subscriber-id
This command is used to set the format of
option 82 sub-option1(Circuit ID option)
added to the DHCP request messages from
interface, standard means the standard VLAN
name and physical port name format,
like”Vlan2+Ethernet1/12”,<circuit-id> is the
circuit-id contents of option 82 specified by
users, which is a string no longer than
64characters. The” no ip dhcp relay
information option subscriber-id” command
will set the format of added option 82 sub-
option1 (Circuit ID option) as standard format.
Global Mode
ip dhcp relay information option remote-id
{standard | <remote-id>}
no ip dhcp relay information option
remote-id
Set the suboption2 (remote ID option) content
of option 82 added by DHCP request packets
(They are received by the interface). The no
command sets the additive suboption2
(remote ID option) format of option 82 as
standard.
3. Enable the DHCP option 82 of server.
Command
Explanation
Global mode
ip dhcp server relay information enable
no ip dhcp server relay information enable
This command is used to enable the switch
DHCP server to identify option82. The “no ip
dhcp server relay information enable”
command will make the server ignore the
option 82.
4. Configure DHCP option 82 default format of Relay Agent
Command
Explanation
Global mode
ip dhcp relay information option
subscriber-id format {hex | acsii | vs-hp}
Set subscriber-id format of Relay Agent
option82.
ip dhcp relay information option remote-id
format {default | vs-hp}
Set remote-id format of Relay Agent option82.