Administrator Guide

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NOTE: If you do not use this option, all UDP ports are considered by default.

Defaults None

Command Modes INTERFACE (config-if)

Command History

This guide is platform-specific. For command information about other platforms, see the relevant Dell EMC

Networking OS Command Line Reference Guide.

Version Description

9.8(0.0P5) Introduced on the S4048-ON.

9.8(0.0P2) Introduced on the S3048-ON.

9.2(1.0) Introduced on the Z9500.

8.3.19.0 Introduced on the S4820T.

8.3.11.1 Introduced on the Z9000.

8.3.7.0 Introduced on the S4810.

Pre-version

8.3.7.0

Introduced on the E-Series.

Usage Information

If you configure the ip helper-address command and ip udp-helper udp-port command, the

behavior is that the UDP broadcast traffic with port numbers 67/68 is unicast relayed to the DHCP server per the

ip helper-address configuration. This occurs regardless if the ip udp-helper udp-port command

contains port numbers 67/68 or not.

If you only configure the ip udp-helper udp-port command, all the UDP broadcast traffic is flooded,

including ports 67/68 traffic if those ports are part of the

udp-port-list.

Commands

• ip helper-address — configure the destination broadcast or host address for the DHCP server.

• debug ip udp-helper — enable debug and displays the debug information on a console.

• show ip udp-helper — display the configured UDP helpers on all interfaces.

show ip udp-helper

Display the configured UDP helpers on all interfaces.

Syntax