D-Link xStack Reference Manual page 311

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xStack DGS-3120 Series Layer 3 Managed Gigabit Switch CLI Reference Guide
Example
To display DHCP relay rulers for option 61:
DGS-3120-24TC:admin#
Command: show dhcp_relay option_61
Default Relay Rule: 10.90.90.200
Matching Rules:
Client-ID
---------------------- -----------
abc
abcde
00-11-22-33-44-55
Total Entries: 3
DGS-3120-24TC:admin#
25-19 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, the DHCP packet will be inserted with the option 82 field
before being relayed to server. The DHCP packet will be processed based on the behavior
defined in check and policy setting.
disable - When the state is disabled, the DHCP packet will be relayed directly to server without
further check and processing on the packet. The default setting is disabled.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To disable DHCP relay option 82 check:
DGS-3120-24TC:admin#config dhcp_relay option_82 check disable
Command: config dhcp_relay option_82 check disable
Success.
DGS-3120-24TC:admin#
show dhcp_relay option_61
Type Relay Rule
----------------
String Drop
String 10.90.90.1
MAC Address Drop
306