D-Link DES-1210-52/ME - Config Dhcp_Relay Option_82

DES-1210-52/ME L2 Metro Ethernet Switch CLI Reference Guide
118
vlanid <vidlist> - Specifies the id of VLAN to be configured.
[enable | disable] – Specifies the VLAN of DHCP Relay to be
enabled or disabled.
Restrictions
Only Administrator, operator or power user-level users can issue this
command.
Example usage:
To specify the VLAN ID 2 of DHCP relay to be enabled:
DES-1210-52/ME:5# config dhcp_relay vlan vlanid 2 state enable
Command: config dhcp_relay vlan vlanid 2 state enable
Success.
DES-1210-52/ME:5#
config dhcp_relay option_82
Purpose
To configure the check, policy and state of DHCP relay agent
information option 82 of the Switch.
Syntax
config dhcp_relay option_82 [check [enable | disable] | policy
[drop | keep | replace] | remote_id [default | user_define <desc
32>] | state [enable | disable] | circuit_id [default | user_define
<desc 32>] ]
Description
The config dhcp_relay option_82 is used to configure the check,
policy and state of DHCP relay agent information option 82 of the
Switch
Parameters
check: used to configure the check of DHCP relay agent information
option 82 of the Switch.
enable – When the field is toggled to enable, the relay agent will
check the validity of the packet’s option 82 field. If the switch
receives a packet that contains the option 82 field from a DHCP
client, the switch drops the packet because it is invalid. In packets
received from DHCP servers, the relay agent will drop invalid
messages.
disable – When the field is toggled to disable, the relay agent will not
check the validity of the packet’s option 82 field.
policy: used to configure the re-forwarding policy of DHCP relay
agent information option 82 of the Switch.
replace − The option 82 field will be replaced if the option 82 field
already exists in the packet received from the DHCP client.
drop − The packet will be dropped if the option 82 field already
exists in the packet received from the DHCP client.
keep − The option 82 field will be retained if the option 82 field
already exists in the packet received from the DHCP client.
state: used to configure the state of DHCP relay agent information
option 82 of the Switch.
enable − When this field is toggled to Enabled the relay agent will
insert and remove DHCP relay information (option 82 field) in