Chapter 1 Udp Helper Configuration; Overview; Configuring Udp Helper; Configuration Prerequisites - H3C S9500 Series Operation Manual

Operation Manual – UDP Helper
H3C S9500 Series Routing Switches

Chapter 1 UDP Helper Configuration

When configuring UDP Helper, go to these sections for information you are interested
in:

Overview

Configuring UDP Helper

Displaying UDP Helper
1.1 Overview
UDP Helper (UDPH) functions as a relay agent that converts UDP broadcast packets
into unicast packets and forwards them to a specified server.
With the UDP Helper function enabled, the device decides whether to forward a
received UDP broadcast packet according to the UDP port number of the packet. If the
packet needs to be forwarded, the device modifies the destination IP address in the IP
header and then sends the packet to the specified destination server. Otherwise, the
device sends the packet to its upper layer module.
1.2 Configuring UDP Helper

1.2.1 Configuration Prerequisites

The router to be configured is reachable.

1.2.2 Configuration Procedure

Follow these steps to configure UDP Helper:
To do...
Enter system view
Enable the
function of
forwarding UDP
broadcast
packets
Use the command...
system-view
udp-helper enable
1-1
Chapter 1 UDP Helper Configuration
Remarks
—
Required
By default, the function is disabled.
When the function is enabled, the
function is enabled on the six
default ports (69, 53, 37, 137, 138,
and 49) simultaneously.
When the function is disabled, the
function is disabled on all the ports,
including the default ports.