CLI Guide

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 Networking OS Command Line Reference Guide.
Version Description
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.
• show ip udp-helper — display the configured UDP helpers on all interfaces.
Interfaces
813