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xStack® DGS-3420 Series Layer 2 Managed Stackable Gigabit Switch CLI Reference Guide
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Chapter 20
DHCP Local Relay
Commands
config dhcp_local_relay vlan <vlan_name 32> state [enable | disable]
config dhcp_local_relay vlan vlanid <vlan_id> state [enable | disable]
enable dhcp_local_relay
disable dhcp_local_relay
show dhcp_local_relay
20-1 config dhcp_local_relay vlan
Description
This command is used to configure the DHCP local relay option for this Switch. The Switch will not,
by default, 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 broadcasted on the specified VLAN.
Note: When dhcp_local_relay is enabled, the Switch will automatically add a DHCP
Option 82 and the source MAC address and gateway address in the packet will
remain unchanged.
Format
config dhcp_local_relay vlan <vlan_name 32> state [enable | disable]
Parameters
<vlan_name 32> - 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-3420-28SC:admin#config dhcp_local_relay vlan default state enable
Command: config dhcp_local_relay vlan default state enable
Success.