How IP helper address works?



An IP Helper address is a special IP address that can be used to forward or redirect traffic from one network segment to another. It is typically used in large networks with multiple subnets, where a single router may not be able to route traffic to all of them. The IP Helper address is essentially a way of creating a virtual tunnel between two different networks, allowing traffic to flow freely between them.

In order to use an IP Helper address, the first step is to configure the router with the IP Helper address. This is done by adding a “helper” command to the router’s configuration. The syntax of this command is typically “ip helper-address ”, where the IP address is the IP Helper’s address. Once the command is added, the router will start forwarding traffic to the IP Helper address.

The second step is to configure the IP Helper address. This is done by setting up a static route on the IP Helper’s router. The static route should point to the destination subnet that traffic needs to be forwarded to. Once this is done, the IP Helper will begin forwarding traffic to the destination subnet.

The third step is to configure the IP Helper’s router to respond to requests from the IP Helper address. This is done by adding an access control list (ACL) to the router’s configuration. The ACL should specify the source IP address of the IP Helper address and the destination IP address of the subnet that traffic needs to be forwarded to. Once this is done, the router will respond to requests from the IP Helper address and forward traffic to the destination subnet.

The fourth step is to configure the destination subnet’s router to accept traffic from the IP Helper address. This is done by adding a static route to the router’s configuration. The static route should point to the IP Helper address. Once this is done, the router will accept traffic from the IP Helper address and forward it to the destination subnet.

In summary, an IP Helper address is a special IP address that can be used to forward or redirect traffic from one network segment to another. It is typically used in large networks with multiple subnets, where a single router may not be able to route traffic to all of them. The IP Helper address is essentially a way of creating a virtual tunnel between two different networks, allowing traffic to flow freely between them. To use an IP Helper address, the router must first be configured with the IP Helper address, and then the IP Helper address must be configured with a static route to the destination subnet. Finally, the destination subnet’s router must be configured to accept traffic from the IP Helper address via a static route.

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