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CCNP SWITCH Portable Command Guide: Implementing Inter-VLAN Routing

Configuring a DHCP Helper Address

Router

Router(config)#interface fastethernet 0/0

Moves to interface configuration mode.

Router(config-if)#ip helper-address 172.16.20.2

DHCP broadcasts will be forwarded as a unicast to this specific address rather than be dropped by the router.

Layer 3 Switch

Switch(config)#interface vlan 10

Moves to SVI configuration mode.

Switch(config-if)#ip helper-address 172.16.20.2

DHCP broadcasts will be forwarded as a unicast to this specific address rather than be dropped by the router.

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