H3C Technologies H3C S5560 Series Switches - Manual (Page 150)

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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.
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 52 , configure UDP helper to convert broadcast to unicast on VLAN-interface 1 of
Switch A. This feature enables Switch A to forward broadcast packets with UDP destination port number
55 to the destination server 10.2.1.1/16.
Figure 52 Network diagram
Configuration procedure
Make sure Switch A can reach the subnet 10.2.0.0/16.
# Enable UDP helper.