User Manual UMN:CLI
V8102
413
9.6.6.2 Option 82 Sub-Option
The DHCP option 82 enables a DHCP relay agent to include information about itself when
forwarding client-originated DHCP packets to a DHCP server. The DHCP server can use
this information to implement security and IP address assignment policies.
There are 2 sub-options for the DHCP option 82 information as follows:
• Remote ID
This sub-option may be added by DHCP relay agents which terminate switched or
permanent circuits and have mechanisms to identify the remote host of the circuit.
Note that, the remote ID must be globally unique.
• Circuit ID
This sub-option may be added by DHCP relay agents which terminate switched or
permanent circuits. It encodes an agent-local identifier of the circuit from which a
DHCP client-to-server packet was received. It is intended for use by DHCP relay
agents in forwarding DHCP responses back to the proper circuit.
To specify a remote ID, use the following command.
system-remote-id hex HEXSTRING
Specifies a remote ID.
(default: system MAC address)
system-remote-id ip A.B.C.D
system-remote-id text STRING
system-remote-id option format NAME
To specify a circuit ID, use the following command.
system-circuit-id hex HEXSTRING
Specifies a circuit ID.
(default: port number)
system-circuit-id index <0-65535>
system-circuit-id text STRING
system-circuit-id option format NAME
system-circuit-id port-type physical
To delete a specified remote and circuit ID, use the following command.
Deletes a specified re-
mote and circuit ID
no system-remote-id option format
no system-circuit-id port-type physical
no system-circuit-id [option format]
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