Ip Gratuitous-Arp-Link - Allied Telesis SwitchBlade x908 Series Software Reference Manual

IP Addressing and Protocol Commands
Use the no parameter to remove a port number from the list of destination port numbers that
are used as the criterion for deciding if a given UDP broadcast should be forwarded to the IP
helper address(es).
Syntax
ip forward-protocol udp <port>
no ip forward-protocol udp <port>
Parameter
<port>
The ip forward-protocol udp command is not enabled by default.
Default
Global Configuration mode
Mode
Combined with the ip helper-address command in interface mode, the ip forward-
Usage
protocol udp command in global configuration 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).
Note:
To configure forwarding of packets on UDP port 53 (DNS protocol), use the following
Examples
commands:
awplus(config)#
To delete UDP port 53 (DNS protocol) from the UDP ports that the switch forwards, use the
following commands:
awplus(config)#
show running-config
Validation
Commands
ip helper-address
Related Commands
ip directed-broadcast

ip gratuitous-arp-link

ip gratuitous-arp-link Command
This command sets the gratuitous-arp time limit for all switchports on the switch. Every
switchport sends a gratuitous-arp on its associated VLAN whenever starting to forward.
23.14
Description
UDP Port Number
The types of UDP broadcast packets that the switch will forward are ONLY those
specified by the ip forward-protocol command(s). There are not other UDP packet
types that the IP helper process forwards by default.
awplus# configure terminal
ip forward-protocol udp 53
awplus# configure terminal
no ip forward-protocol udp 53
New vs_531 %flag
Software Reference for SwitchBlade® x908, x900 and x600 Series Switches
TM
AlliedWare Plus Operating System - Software Version 5.3.1
IP Addressing and Protocol Commands This is a new command that sets the gratuitous-arp time limit for all switchports on the switch.
C613-50007-01 REV B