Configuring ip helper to manage broadcasts

How IP helper address works & what is the difference between dhcp & IP helper-address .please explain in brief.

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Using the ip helper-address command sets up a DHCPhường relay. DHCP.. only works on the LAN to which it is connected because it uses broadcast, which cannot cross a router. To remedy that situation, DHCP relay was created. It gives DHCP. an option so that a router intercepts the DHCPhường. client"s broadcast request, creates a unicast request lớn the DHCPhường hệ thống on a different LAN, & the DHCP.. hệ thống can give sầu a unicast response to the router based on the DHCP option, that then passes on the DHCPhường response khổng lồ the requesting DHCP client.

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To add lớn Ron"s great answer:

The key piece of this is that the Router sending the DHCPhường request on behalf of the client will unicast the request with a source address from the address space the client is in (the interface the relay/helper-address is configured on). This is ensures the DHCPhường VPS offers an IP.. from the correct scope.


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