Avaya P3343T-ML Manual Do Utilizador

Chapter 12        Avaya P330 Layer 3 Features

146

Avaya P334T-ML User’s Guide

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The virtual router IP address needs to be configured as Default Gateway on the 
stations

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The MAC which will be advertised by the Main router as a response to the 
stations ARP requests, will be a 6 bytes Virtual MAC address in the format 
00.00.5E.00.01.VRID.

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In the meantime, the redundant router will use a VRRP polling protocol (not 
ping as in SRRP) to check the Main router integrity in one second intervals 
(default). Otherwise it will be idle.

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If the Main router fails, a redundant router that has not received a response 
from four consecutive polling requests (default) will take over and start to 
advertise the same Virtual MAC for the ARP requests. Therefore the stations 
will not ‘sense’ any change neither in the configured DG nor in the MAC level.

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VRRP has no provisions for routing data base synchronization among the 
redundant routers. You need to perform this manually.

Case #2

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One router is Main on one IP subnet (e.g. 20.20.20.0) and redundant on another 
(e.g. 30.30.30.0)

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In this case each IP subnet must be in different VRID (e.g. 1 & 2) 

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The above detailed information is valid for each router in its Main/Redundant 
roles. 

In order to...

Use the following command...

Enable or disable VRRP routing 
globally

router vrrp 

Create or delete a virtual router on 
the interface

ip vrrp

Assign or remove an IP address to 
the virtual router

ip vrrp address 

Set the virtual router advertisement 
timer value (in seconds) for the 
virtual router ID

ip vrrp timer 

Set the virtual router priority value 
used when selecting a master route

ip vrrp priority