R2511-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V5)

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Multicast UDP helper configuration example
Network requirements
As shown in Figure 93, the IP address of Ethernet 1/2 of Router A is 10.110.1.1/16, and the interface
connects to the subnet 10.110.0.0/16.
Configure multicast UDP helper to forward broadcast packets with UDP destination port number 55 and
destination IP address 224.1.1.1 to all hosts on the destination subnet 10.110.0.0/16.
Figure 93 Network diagram
Configuration procedure
Make sure Router B can forward packets to Router A through multicast.
Make sure Router B can forward packets to Router A through multicast.
# Enable UDP helper.
<RouterA> system-view
[RouterA] udp-helper enable
# Enable the forwarding of broadcast packets with the UDP destination port 55.
[RouterA] udp-helper port 55
# Specify a mapping between the multicast address and the subnet broadcast address.
[RouterA] interface ethernet 1/1
[RouterA-Ethernet1/1] udp-helper multicast-map 224.1.1.1 10.110.255.255