Users Guide

Table Of Contents
Related
Commands
ip udp-helper udp-port enable the UDP broadcast feature on an interface.
show ip udp-helper display the configured UDP helper(s) on all interfaces.
ip udp-helper udp-port
Enable the UDP broadcast feature on an interface either for all UDP ports or a specified list of UDP ports.
Syntax
ip udp-helper udp-port [udp-port-list]
To disable the UDP broadcast on a port, use the no ip udp-helper udp-port [udp-port-
list] command.
Parameters
udp-port-list
(OPTIONAL) Enter up to 16 comma-separated UDP port numbers.
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.
Related
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
show ip udp-helper
Defaults None
Command Modes EXEC
Command
History
This guide is platform-specific. For command information about other platforms, see the relevant Dell
EMC Networking OS Command Line Reference Guide.
752 Interfaces