D-Link xStack - Chapter 22 DHCP Local Relay Commands

xStack® DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch CLI Reference Guide
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Chapter 22 DHCP Local Relay
Commands
config dhcp_local_relay vlan <vlan_name 32> state [enable | disable]
config dhcp_local_relay vlan vlanid <vlan_id 1-4094> state [enable | disable]
enable dhcp_local_relay
disable dhcp_local_relay
show dhcp_local_relay
22-1 config dhcp_local_relay vlan
Description
This command is used to enable or disable the DHCP local relay function for a specified VLAN. By
default, the switch will not broadcast DHCP packets on any VLAN for which a DHCP relay is
configured. DHCP packets will be intercepted, and only be relayed to the servers specified in the
dhcp_relay command. This is done to minimise the risk with rogue DHCP servers. Enabling the
dhcp_local_relay feature will restore the broadcast behaviour, and cause DHCP packets to also be
broadcast on the specified VLAN.
Note: When “dhcp_local_relay” is enabled, the switch will automatically add DHCP option 82, and
the source MAC and gateway in the packet will remain unchanged.
Format
config dhcp_local_relay vlan <vlan_name 32> state [enable | disable]
Parameters
<vlan_name 32> - Enter the name of the VLAN to be enabled for DHCP local relay.
state - Enable or disable DHCP local relay for a specified VLAN.
enable - Enable DHCP local relay for a specified VLAN.
disable - Disable DHCP local relay for a specified VLAN.
Restrictions
Only Administrator, Operator and Power-User level users can issue this command.
Example
To enable DHCP local relay for the default VLAN:
DGS-3620-28SC:admin#config dhcp_local_relay vlan default state enable
Command: config dhcp_local_relay vlan default state enable
Success.
DGS-3620-28SC:admin#