3com 8807 사용자 가이드

UDP Helper functions as a relay that converts UDP broadcast packets into unicast 
packets and forwards them to a specified server.

 With the UDP Helper function enabled, the device decides whether to forward a 
received UDP broadcast packet according to the UDP port number of the packet. If 
the packet needs to be forwarded, the device modifies the destination IP address 
in the IP header and then sends the packet to the specified destination server. 
Otherwise, the device sends the packet to its upper layer module.

UDP 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 forwarded

The router to be configured is reachable.

Table 674   Configure UDP helper

Enter system view 

system-view 

- 

Enable the function of 
forwarding UDP broadcast 
packets 

udp-helper enable 

Required

■

By default, the functioin is 
disabled.

■

When the function is 
enabled, the function is 
enabled on the six default 
ports (69, 53, 37, 137, 
138, and 49) 
simultaneously.

■

When the function is 
disabled, the function is 
disabled on all the ports, 
including the default ports.