Allied Telesis AT-8948 Hoe configureren

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AlliedWare

Configure VRRP (Virtual Router Redundancy

How To |

Protocol)

Introduction

VRRP is a popular protocol for providing device redundancy, for connecting redundant WAN

gateway routers or server access switches. It allows a backup router or switch to

automatically take over if the primary (master) router or switch fails.

This How To Note describes one possible basic VRRP configuration.

VRRP works by grouping the redundant routers together into a single virtual router. That

virtual router entity has an IP address of its own. Instead of sending traffic to an individual

router, PCs etc send traffic to the virtual router address (for example, by using the virtual

router address as their gateway address). The master router processes traffic that is

addressed to the virtual router address and forwards it appropriately.

The master router also sends out regular advertisements to the backup router. If the master

router goes down, the backup router stops receiving these advertisements. In that case, the

backup router takes over as the master router and starts processing traffic. When the

original master router comes back up, it takes over as the master router again.

For more information about VRRP, see the Software Reference for your router or switch.

Which products does this note apply to?

This configuration applies to the following Allied Telesis switches, running all supported

AlliedWare software versions:

AT-8600, AT-8700XL, AT-8800, Rapier, Rapier w, and Rapier i series

AT-8948, AT-9900, AT-9900s, and x900 series

SwitchBlade 4000 and AT-9800 series

VRRP is also available on AR400 and AR700 series routers, but this solution uses STP, which

is not available on the routers.

C613-16127-00 REV A