Reference Guide

no ip helper-address (Interface Config)
Use this command to delete a relay entry on an interface. The no command with no arguments clears
all helper addresses on the interface.
Format no ip helper-address [server-address | discard ][dest-udp-
port | dhcp | domain | isakmp | mobile ip | nameserver |
netbios-dgm | netbios-ns | ntp | pim-auto-rp | rip | tacacs |
tftp | time]
Mode Interface Config
ip helper enable
Use this command to enable relay of UDP packets. This command can be used to temporarily disable IP
helper without deleting all IP helper addresses. This command replaces the bootpdhcprelay
enable command, but aects not only relay of DHCP packets, but also relay of any other protocols for
which an IP helper address has been configured.
Default disabled
Format ip helper enable
Mode
•
Global Config
•
Virtual Router Config
The following shows an example of the command.
(Extreme 220) (Config)#ip helper enable
no ip helper enable
Use the no form of this command to disable relay of all UDP packets.
Format
no ip helper enable
Mode Global Config
show ip helper-address
Use this command to display the IP helper address configuration. The argument unit/slot/port
corresponds to a physical routing interface or VLAN routing interface. The keyword vlan is used to
specify the VLAN ID of the routing VLAN directly instead of a unit/slot/port format.
Format
show ip helper-address unit/slot/port|vlan 1-4093}]
Mode Privileged EXEC
Routing Commands
ExtremeSwitching 200 Series: Command Reference Guide for version 01 .02.04.0007 562