HPE FlexNetwork MSR Series Comware 7 Layer 3 - Ip Services Configuration Guides

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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 uses the configured UDP ports to match the
UDP destination port number of the packet.
• If a match is found, UDP helper searches the configured mappings based on the packet's
destination multicast address.
{ UDP helper duplicates the packet and modifies the copy's destination IP address to the
broadcast or unicast address in the matched mapping. 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
number.
udp-helper port
{ port-number |
dns
|
netbios
-
ds
|
netbios-ns
|
tacacs
|
tftp
|
time
}
By default, no UDP port numbers are
specified.
4. Enter interface view.
interface
interface-type
interface-number
N/A
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 commands 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

HPE FlexNetwork MSR Series Specifications

General

Brand	HPE
Model	FlexNetwork MSR Series
Category	Network Router
Language	English