API Guide

Version Description
8.3.19.0 Introduced on the S4820T.
8.3.7.0 Introduced on the S4810.
Pre-version
8.3.7.0
Introduced on the E-Series ExaScale.
Usage
Information
When a UDP broadcast packet is flooded out of an interface, and the outgoing interface is configured
using this command, the outgoing packet’s IP destination address is replaced with the configured
broadcast address.
Related
Commands
debug ip udp-helper — enables debug and displays the debug information on a console.
show ip udp-helper — displays the configured UDP helpers 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
9.10(0.0) Introduced on the S3148.
9.8(2.0) Introduced on the S3100 series.
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.
692 Interfaces