4000 Router Series Layer 3 - IP Services Configuration Guide

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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

UDP helper configuration example

Network requirements

As shown in Figure 66, configure UDP helper on Router A to forward broadcast packets with UDP

destination port 55 and destination IP address 255.255.255.255 or 10.110.255.255 to the destination

s e r v e r 10 . 2.1.1 / 16 .

Figure 66 Network diagram

Configuration procedure

Make sure Router A can reach the subnet 10.2.0.0/16.

# Enable UDP helper.

<RouterA> system-view

[RouterA] udp-helper enable

# Enable UDP helper to forward broadcast packets with the UDP destination port 55.

[RouterA] udp-helper port 55

# Specify the destination server 10.2.1.1 on the interface Ethernet 1/1.

[RouterA] interface ethernet 1/1

[RouterA-Ethernet1/1] ip address 10.110.1.1 16

[RouterA-Ethernet1/1] udp-helper server 10.2.1.1