Command Line Reference Guide

606 | Interfaces
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ip udp-helper udp-port
e
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
Defaults
No default behavior or values
Command Modes
INTERFACE (config-if)
Usage
Information
If the ip helper-address command and ip udp-helper udp-port command are configured, the
behavior is that the UDP broadcast traffic with port numbers 67/68 will be unicast relayed to the DHCP
server per the ip helper-address configuration. This will occur regardless if the ip udp-helper
udp-port command contains port numbers 67/68 or not.
If only the
ip udp-helper udp-port command is configured, all the UDP broadcast traffic is flooded,
including ports 67/68 traffic if those ports are part
of the udp-port-list.
Related
Commands
show ip udp-helper
e
Display the configured UDP helper(s) on all interfaces.
Syntax
show ip udp-helper
Defaults
No default configuration or values
Command Modes
EXEC
Example FTOS#show ip udp-helper
--------------------------------------------------
Port UDP port list
--------------------------------------------------
Gi 10/0 656, 658
Gi 10/1 All
Related
Commands
udp-port-list
(OPTIONAL) Enter up to 16 comma separated UDP port numbers.
Note: If this option is not used, all UDP Ports are considered by default.
ip helper-address Configure the destination broadcast or host address for DHCP server.
debug ip udp-helper Enable debug and display the debug information on a console.
show ip udp-helper Display the configured UDP helper(s) on all interfaces.
debug ip udp-helper Enable debug and display the debug information on a console.
ip udp-broadcast-address Configure a UDP IP address for broadcast.
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.