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

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Step Command Remarks
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
5. Specify a destination
server for UDP helper to
convert broadcast to
unicast.
udp-helper server ip-address [ global |
vpn-instance vpn-instance-name ]
By default, no destination server
is specified.
If you specify multiple
destination servers, UDP helper
creates one copy for each
server.
Use this command on the
interface that receives
broadcast packets.
Configuring UDP helper to convert broadcast to
multicast
You can configure UDP helper to convert broadcast packets with specific UDP port numbers to multicast
packets.
Upon receiving a UDP broadcast packet, UDP helper matches the UDP destination port number of the
packet against the configured UDP ports.
• If a match is found, UDP helper duplicates the packet and modifies the destination IP address of the
copy to the configured multicast address. Then UDP helper forwards the packet to the multicast
group.
• If no match is found, UDP helper does not process the packet.
To configure UDP helper to convert broadcast to multicast:
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