Reference Guide

Pre-version
8.3.7.0
Introduced on the E-Series ExaScale.
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 — configures the destination broadcast or host address for the DHCP
server.
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.
show ip udp-helper
Display the configured UDP helpers on all interfaces.
S4810
Syntax
show ip udp-helper
Defaults none
Command Modes EXEC
Command History
This guide is platform-specific. For command information about other platforms, refer to the
relevant FTOS Command Line Reference Guide .
The following is a list of the FTOS version history for this command.
Version 8.3.19.0 Introduced on the S4820T.
Version 8.3.11.1 Introduced on the Z9000.
Version 8.3.7.0 Introduced on the S4810.
Pre-version
8.3.7.0
Introduced on the E-Series ExaScale.
Example
FTOS#show ip udp-helper
--------------------------------------------------
Port UDP port list
--------------------------------------------------
Gi 10/0 656, 658
Gi 10/1 All
Related
Commands
debug ip udp-helper — enables debug and displays the debug information on a console.
ip udp-broadcast-address — configures a UDP IP address for broadcast.
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