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

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Step Command Remarks
5. Specify a destination
multicast address for UDP
helper to convert
broadcast to multicast.
udp-helper broadcast-map
multicast-address [ acl acl-number ]
By default, no destination
multicast address is specified
for UDP helper.
If you specify multiple multicast
addresses, UDP helper creates
one copy for each address.
Use this command on the
interface that receives
broadcast packets.
Configuring UDP helper to convert multicast to
broadcast or unicast
You can configure UDP helper to convert multicast packets with specific UDP port numbers and multicast
addresses to broadcast or unicast packets.
Upon receiving a UDP multicast packet, UDP helper matches the UDP destination port number of the
packet against the configured UDP ports.
• If a match is found, UDP helper searches the configured mappings based on the packet's
destination multicast address.
{ If a match is found, UDP helper duplicates the packet and modifies the destination IP address of
the copy to the mapping broadcast or unicast address. Then UDP helper forwards the packet to
its destination.
{ If no match is found, UDP helper does not process the packet.
• If the packet's destination port number does not match the configured UDP ports, UDP helper does
not process the packet.
To configure UDP helper to convert multicast to broadcast or unicast:
Step Command Remarks
1. Enter system view.
system-view N/A
2. Enable UDP helper.
udp-helper enable By default, UDP helper is disabled.
3. Specify a UDP port.
udp-helper port { port-number | dns
| netbios-ds | netbios-ns | tacacs |
tftp | time }
By default, no UDP port is specified.
4. Enter interface view.
interface interface-type
interface-number
N/A