To restrict the forwarded traffic, you can specify the restrictions by adding any of the following no commands to your configuration at the Global Configuration mode.Ĭisco documentation calls this a ‘DHCP Relay’, and uses the command IP-Helper, and I usually call this DHCP Helper, just to confuse everyone. UDP Traffic Forwarded by IP Helper Address When you enable the IP Helper address, all traffic for the UDP ports are automatically forwarded to the address specified. The configuration for this command follows note that you first must change the router interface to which you will be assigning the helper. In this way, you can implement a single DHCP server as one management point where you can check the leases for any device on your network and manage all the IP subnets on your network.Įach subnet that does not have its own DHCP server will be configured with an ip helper-address command. You can implement an IP Helper address to forward Dynamic Host Configuration Protocol (DHCP) broadcasts on to their appropriate destination.
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