63 UDP H ELPER CONFIGURATIONOverview UDP Helper functions as a relay that converts UDP broadcast packets into unicastpackets and forwards them to a specified server.With the UDP Helper function enabled, the device decides whether to forward areceived UDP broadcast packet according to the UDP port number of the packet. Ifthe packet needs to be forwarded, the device modifies the destination IP addressin the IP header and then sends the packet to the specified destination server.Otherwise, the device sends the packet to its upper layer module.Configuring UDPHelperUDP helper configuration includes:■ Enabling/disabling the function of forwarding UDP broadcast packets■ Specifying the UDP ports whose packets need to be forwarded■ Configuring the destination server to which the UDP packets are forwardedConfigurationPrerequisitesThe router to be configured is reachable.Configuration Procedure Table 674 Configure UDP helperOperation Command DescriptionEnter system view system-view -Enable the function offorwarding UDP broadcastpacketsudp-helper enableRequired■ By default, the functioin isdisabled.■ When the function isenabled, the function isenabled on the six defaultports (69, 53, 37, 137,138, and 49)simultaneously.■ When the function isdisabled, the function isdisabled on all the ports,including the default ports.
