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2.8 | ![]() |
Helper Addresses | |
2.8.2 | ![]() |
Configuring IP helper addresses |
To configure the helper address,
identify the router interface that will be receiving the broadcasts for
UDP services. In the interface configuration mode, use the
ip helper-address
command to define the address to which UDP broadcasts for services
should be forwarded. By default, the ip helper-address command forwards the eight UDPs services shown in Figure![]() What if Company XYZ needs to forward requests for a service not on this list? The Cisco IOS provides the global configuration command ip forward-protocol to allow an administrator to forward any UDP port in addition to the default eight. In order to forward UDP on port 517, use the global configuration command, ip forward-protocol udp 517. This command is used not only to add a UDP port to the default eight, but also to subtract an unwanted service from the default group.![]() ![]()
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