D-Link xStack DGS-3420 Series Reference Manual page 296

xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
DGS-3420-28SC:admin#
21-12 config dhcp_relay option_82 check
Description
This command is used to configure the checking mechanism of the DHCP relay agent information
Option 82 of the switch.
Format
config dhcp_relay option_82 check [enable | disable]
Parameters
enable - When the state is enabled, for a packet coming from the client side, the packet should not
have the Option 82 field. If the packet has this option field, it will be dropped.
disable - The default setting is disabled.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To configure the checking mechanism of the DHCP relay agent information Option 82:
DGS-3420-28SC:admin#config dhcp_relay option_82 check disable
Command: config dhcp_relay option_82 check disable
Success.
DGS-3420-28SC:admin#
21-13 config dhcp_relay option_82 policy
Description
This option takes effect only when the check status is disabled. The relay agent does this operation
because the packet cannot contain two Option 82s. The default setting is replace.
Format
config dhcp_relay option_82 policy [replace | drop | keep]
Parameters
replace - Replace the existing option 82 field in the packet.
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