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Alteon Application Switch Operating System Application Guide

High Availability

Document ID: RDWR-ALOS-V2900_AG1302 527

To configure VRRP grouping for virtual routers

1. On the active Alteon, define a single VRRP group for all virtual routers.

2. On the standby Alteon, define the same VRRP group with a lower base priority.

Active-Active Redundancy

This section describes the following topics:

• Active-Active Environments, page 527

• Configuring Active-Active Redundancy, page 529

Active-Active Environments

This configuration is based on proprietary Alteon extensions to VRRP.

Alteon has extended VRRP features to include virtual servers, allowing full active-active redundancy

between its Layer 4 devices. In an active-active configuration, both switches can process traffic for

the same service at the same time. Both switches share interfaces at Layer 3 and Layer 4, meaning

that both switches can be active simultaneously for a given IP routing interface or load-balancing

virtual server (VIP).

This configuration is often used to allow two different data centers located at different locations to

have different Internet access paths.

>> Main # /cfg/l3/vrrp/group en

(Enable VRRP grouping)

>> Main # /cfg/l3/vrrp/group/vrid 60

(Specify the virtual router ID for the

VRRP group)

>> Main # /cfg/l3/vrrp/group/if 1

(Set the IP interface to which VRRP

group advertisements will be sent)

>> Main # /cfg/l3/vrrp/group/prio 101

(Set the priority base for all virtual

routers in the VRRP group)

>> Main # /cfg/l3/vrrp/group/share dis

(Disable sharing for the VRRP group

and all the virtual routers in the group)

>> Main # /cfg/l3/vrrp/group/track/if e

(Set tracking to IP interfaces)