dhcp snooping information strategy
Use dhcp snooping information strategy to configure the handling strategy for Option 82 in request messages.
Use undo dhcp snooping information strategy to restore the default.
Syntax
dhcp snooping information strategy { drop | keep | replace }
undo dhcp snooping information strategy
Default
The handling strategy for Option 82 in request messages is replace.
Views
Layer 2 Ethernet interface view
Layer 2 aggregate interface view
Predefined user roles
network-admin
mdc-admin
Parameters
drop: Drops DHCP messages that contain Option 82.
keep: Keeps the original Option 82 intact and forwards the DHCP messages.
replace: Replaces the original Option 82 with the configured Option 82 before forwarding the DHCP messages.
Usage guidelines
This command takes effect only on DHCP requests that contain Option 82. For DHCP requests that do not contain Option 82, the DHCP snooping device always adds Option 82 into the requests before forwarding them to the DHCP server.
If the handling strategy is replace, configure a padding mode and a padding format for Option 82. If the handling strategy is keep or drop, you do not need to configure a padding mode or padding format for Option 82.
Examples
# Specify the handling strategy for Option 82 in request messages as keep.
<Sysname> system-view [Sysname] interface [Sysname-] dhcp snooping information enable [Sysname-] dhcp snooping information strategy keep
Related commands
dhcp snooping information circuit-id
dhcp snooping information remote-id