R0106-HP MSR Router Series Layer 3 - IP Services Configuration Guide(V7)

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Step Command Remarks
5. Map a multicast address
to a directed broadcast or
a unicast address for UDP
helper.
udp-helper multicast-map
multicast-address ip-address
[ global | vpn-instance
vpn-instance-name ] [ acl
acl-number ]
By default, no address mapping is
specified for UDP helper.
If you specify multiple multicast and
unicast addresses, UDP helper creates
one copy for each address.
For multicast to broadcast conversion,
do not specify a limited broadcast
address for the ip-address argument.
Use this command on the interface that
receives multicast packets.
Displaying and maintaining UDP helper
Execute display command in any view and reset command in user view.
Task Command
Display information about broadcast to unicast
conversion by UDP helper on an interface.
display udp-helper interface interface-type interface-number
Clear packet statistics for UDP helper. reset udp-helper statistics
UDP helper configuration examples
Configuring UDP helper to convert broadcast to unicast
Network requirements
As shown in Figure 70, configure UDP helper to convert broadcast to unicast on GigabitEthernet 2/1/1
of Router A. This feature enables Router A to forward broadcast packets with UDP destination port 55 to
the destination server 10.2.1.1/16.
Figure 70 Network diagram
Configuration procedure
Make sure Router A can reach the subnet 10.2.0.0/16.
# Enable UDP helper.