D-Link DGS-3620-52T CLI Guide - Page 337
DHCP Local Relay, Commands
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xStack® DGS-3620 Series Layer 3 Managed Stackable Gigabit Switch CLI Reference Guide Chapter 21 DHCP Local Relay Commands config dhcp_local_relay vlan state [enable | disable] config dhcp_local_relay vlan vlanid state [enable | disable] enable dhcp_local_relay disable dhcp_local_relay show dhcp_local_relay 21-1 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 state [enable | disable] Parameters - Specify 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# 332