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CLI-based Configuration Guide - IP Service

AR100, AR120, AR160, AR1200, AR2200, AR3200, and AR3600 V300R003

This document describes the concepts and configuration procedures of IP Service features on the device, and provides the configuration examples.
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Configuring UDP Helper

Configuring UDP Helper

The UDP helper function relays the UDP broadcast packets destined for specified ports.

Pre-configuration Tasks

Before configuring UDP helper, complete the following task:

  • Configuring a reachable route from the router to the destination server

    .

Procedure

  1. Run system-view

    The system view is displayed.

  2. Run udp-helper enable

    UDP helper is enabled.

  3. (Optional) Run udp-helper port { port-number | dns | netbios-ds | netbios-ns | tacacs | tftp | time }

    The UDP destination port to which UDP broadcast packets are relayed is specified.

    NOTE:

    After UDP helper is enabled, the router relays the UDP packets with the following destination ports by default: Time (37), TACACS (49), DNS (53), TFTP (69), NetBIOS-NS (137), and NetBIOS-DS (138). If the UDP destination port you want to specify is among the six ports, skip this step.

  4. Run interface interface-type interface-number

    The interface view is displayed.

    The interface must be a VLANIF interface, Layer 3 Ethernet interface, or Layer 3 Ethernet sub-interface.

  5. Run udp-helper server ip-address

    The destination server for UDP helper is specified.

Verifying the Configuration

  • Run the display udp-helper port command to check the UDP port numbers of the packets that need to be relayed.
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Updated: 2019-03-06

Document ID: EDOC1100069333

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