R3721-F3210-F3171-HP High-End Firewalls Network Management Command Reference-6PW101

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Use undo dhcp relay information enable to disable Option 82 support.
By default, Option 82 support is disabled on DHCP relay agent.
Related commands: display dhcp relay information.
Examples
# Enable Option 82 support on the relay agent.
<Sysname> system-view
[Sysname] interface GigabitEthernet 0/1
[Sysname-GigabitEthernet0/1] dhcp relay information enable
dhcp relay information format
Syntax
dhcp relay information format { normal | verbose [ node-identifier { mac | sysname | user-defined
node-identifier } ] }
undo dhcp relay information format
View
Interface view
Default level
2: System level
Parameters
normal: Specifies the normal padding format.
verbose: Specifies the verbose padding format.
node-identifier { mac | sysname | user-defined node-identifier }: Specifies access node identifier. By
default, the node MAC address is used as the node identifier.
• mac indicates using MAC address as the node identifier.
• sysname indicates using the device name of a node as the node identifier.
• user-defined node-identifier indicates using a specified character string as the node identifier, in
which node-identifier is a string with 1 to 50 characters.
Description
Use dhcp relay information format to specify a padding format for Option 82.
Use undo dhcp relay information format command to restore the default padding format.
The Option 82 padding format defaults to normal.
NOTE:
• If configuring the handling strategy of the DHCP relay agent as replace, you need to configure a
padding format of Option 82. If the handling strategy is keep or drop, you need not configure any
padding format.
• If sub-option 1 (node identifier) of Option 82 is padded with the device name (sysname) of a node, the
device name must contain no spaces. Otherwise, the DHCP relay agent drops the message.
Related commands: display dhcp relay information.