Displaying And Maintaining Udp Helper; Udp Helper Configuration Example - H3C S5500-EI series Operation Manual

Operation Manual – UDP Helper
H3C S5500-EI Series Ethernet Switches
Specify the destination
server to which UDP
packets are to be
forwarded
Caution:
The UDP Helper enabled device cannot forward DHCP broadcast packets. That is
to say, the UDP port number cannot be set to 67 or 68.
For the dns, netbios-ds, netbios-ns, tacacs, tftp, and time keywords, you can
specify port numbers or the corresponding parameters. For example, udp-helper
port 53 and udp-helper port dns specify the same UDP port number.
The configuration of all UDP ports is removed if you disable UDP Helper.
You can configure up to 20 destination servers on a VLAN interface.

1.3 Displaying and Maintaining UDP Helper

Displays the information
of forwarded UDP packets
Clear statistics about
packets forwarded

1.4 UDP Helper Configuration Example

I. Network requirements
The interface VLAN-interface 1 of Switch A has the IP address of 10.110.1.1/16,
connecting to the network segment 10.110.0.0/16. Enable the forwarding of broadcast
packets with the UDP destination port number 55 to the destination server 10.2.1.1/16.
To do...
udp-helper server
ip-address
To do...
display udp-helper
server [ interface
Vlan-interface vlan-id ]
reset udp-helper packet
Chapter 1 UDP Helper Configuration
Use the command...
Use the command...
1-2
Remarks
Required
No destination server is
specified by default.
Remarks
Available in any view
Available in user view