Allied Telesis IE340 Series User Manual

C613-50631-01 Rev A Command Reference for IE340 Series 882
AlliedWare Plus™ Operating System - Version 5.5.3-0.x
IP ADDRESSING AND PROTOCOL COMMANDS
IP
HELPER-ADDRESS
ip helper-address
Overview Use this command to add a forwarding destination address for IP Helper to enable
forwarding of User Datagram Protocol (UDP) broadcasts on an interface.
Use the no variant of this command to disable the forwarding of broadcast packets
to specific addresses.
Syntax
ip helper-address <ip-addr>
no ip helper-address <ip-addr>
Default The destination address for the ip helper-address command is not configured by
default.
Mode Interface Configuration for a VLAN interface or a local loopback interface.
Usage notes Combined with the ip forward-protocol udp command in global configuration
mode, the ip helper-address command in interface mode allows control of which
protocols (destination port numbers) are forwarded. The ip forward-protocol
udp command configures protocols for forwarding, and the ip helper-address
command configures the destination address(es).
The destination address can be a unicast address or a subnet broadcast address.
The UDP destination port is configured separately with the ip forward-protocol
udp command. If multiple destination addresses are registered then UDP packets
are forwarded to each IP address added to an IP Helper. Up to 32 destination
addresses may be added using IP Helper.
The device will only forward the types of UDP broadcast packets that are specified
by the ip forward-protocol command(s). The device does not forward any other
UDP packet types by default.
The ip helper-address command does not support BOOTP / DHCP Relay. The
service dhcp-relay command must be used instead. For this reason, you may not
configure UDP ports 67 and 68 with the ip forward-protocol command.
See the IP Feature Overview and Configuration Guide for more information about
DHCP Relay.
Examples The following example defines IPv4 address 192.168.1.100 as an IP Helper
destination address to which to forward UDP broadcasts received on vlan2:
awplus# configure terminal
awplus(config)# interface vlan2
awplus(config-if)# ip helper-address 192.168.1.100
Parameter Description
<ip-addr> Forwarding destination IP address for IP Helper.

Allied Telesis IE340 Series Specifications

General

Brand	Allied Telesis
Model	IE340 Series
Category	Switch
Language	English