ip helper-address
ip helper-address
address-number
[
ip-address
[
unicast
]
]
no ip helper-address
address-number
[
ip-address
[
unicast
]
]
IP helper address is not configured.
Interface configuration mode
To forward a client broadcast request for a UDP application when the client and server are on different networks, you must configure a helper address on the interface connected to the client. Specify the server IP address or the subnet directed broadcast address of the IP subnet the server is in as the helper address.
You can configure up to 16 helper addresses on each interface. You can configure a helper address on an Ethernet port or a virtual interface.
By default, IP helper does not forward client broadcast request to a server within the network. To forward a client broadcast request when the client and server are on the same network, configure an IP helper with unicast option on the interface connected to the client.
The
no form of the command removes the configured helper address.