Dns proxy, Displaying and maintaining udp helper, Udp helper configuration example – H3C Technologies H3C S12500 Series Switches User Manual
Page 114: Network requirements, Configuration procedure
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Displaying and maintaining UDP helper
Execute display command in any view and reset command in user view.
Task Command
Display information about packets forwarded
by UDP helper.
display udp-helper interface interface-type interface-number
Clear UDP helper statistics.
reset udp-helper statistics
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UDP helper configuration example
By default, Ethernet, VLAN, and aggregate interfaces are down. To configure such an interface, bring
the interface up by executing the undo shutdown command.
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Network requirements
As shown in
749H
Figure 40
, configure UDP helper to forward broadcast packets with UDP destination port
number 55 and destination IP address 255.255.255.255 or 10.110.255.255 to the destination server
10.2.1.1/16.
Figure 40 Network diagram
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Configuration procedure
Make sure Switch A can reach the subnet 10.2.0.0/16.
# Enable UDP helper.
[SwitchA] System-view
[SwitchA] udp-helper enable
# Enable UDP helper to forward broadcast packets with the UDP destination port 55.
[SwitchA] udp-helper port 55
# Specify the destination server 10.2.1.1 on VLAN-interface 1.
[SwitchA] interface vlan-interface 1
[SwitchA-Vlan-interface1] ip address 10.110.1.1 16
[SwitchA-Vlan-interface1] udp-helper server 10.2.1.1