Administrator Guide

Layer 3 Routing Commands 1481
Command History
Description revised in 6.3.5 release.
ip helper enable
Use the ip helper enable command to enable relay of UDP packets. To
disable relay of all UDP packets, use the “no” form of this command.
Syntax
ip helper enable
no ip helper enable
Default Configuration
IP helper is enabled by default.
Command Mode
Global Configuration mode
User Guidelines
This command can be used to temporarily disable IP helper without deleting
all IP helper addresses.
This command replaces the bootpdhcprelay enable command, but affects not
only relay of DHCP packets, but also relay of any other protocols for which an
IP helper address has been configured.
When in Virtual Router Configuration mode, this command operates within
the context of the virtual router instance. When in Global Configuration
mode, the command operates on the global router instance.
Virtual Router Configuration mode is only available on the
N3000/N3100/N4000 switches.
Example
console(config)#ip helper enable