DHCP option 82 Configuration
284
ip dhcp relay information policy {drop
| keep | replace}
no ip dhcp relay information policy
This command is used to set the
retransmitting policy of the system for the
received DHCP request message which
contains option 82. The drop mode
means that if the message has option82,
then the system will drop it without
processing; keep mode means that the
system will keep the original option 82
segment in the message, and forward it
to the server to process; replace mode
means that the system will replace the
option 82 segment in the existing
message with its own option 82, and
forward the message to the server to
process. The ―no ip dhcp relay
information
policy‖
will
set
the
retransmitting policy of the option 82
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+Ethernet1/0/12‖,<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