DES-3028 DES-3028P DES-3028G DES-3052 DES-3052P Layer 2 Fast Ethernet Switch CLI Reference Manual
143
config dhcp_relay option_82 state
restricting the number of IP addresses that can be assigned to a single remote
ID or circuit ID. Then the DHCP server echoes the option 82 field in the DHCP
reply. The DHCP server unicasts the reply to the back to the relay agent if the
request was relayed to the server by the relay agent. The switch verifies that it
originally inserted the option 82 data. Finally, the relay agent removes the
option 82 field and forwards the packet to the switch port that connects to the
DHCP client that sent the DHCP request.
disable If the field is toggled to disable the relay agent will not insert and
remove DHCP relay information (option 82 field) in messages between DHCP
servers and clients, and the check and policy settings will have no effect.
Restrictions Only Administrator-level users can issue this command.
Example usage:
To configure DHCP relay option 82 state:
DES-
82 state
enable
Success.
DES-3028P:4#
config dhcp_relay option_82 check
Purpose Used to configure the checking mechanism of DHCP relay agent
information option 82 of the switch.
Syntax
config dhcp_relay option_82 check [enable | disable]
Description This command is used to configure the checking mechanism of
DHCP/BOOTP relay agent information option 82 of the switch.
Parameters 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.
Restrictions Only Administrator-level users can issue this command.
Example usage:
To configure DHCP relay option 82 check:
DES-
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