User guide

168 ExtremeWarePx1 1.2 Command Reference Guide

Commands for Conﬁguring Redundancy

For example, suppose that:

¥ VRRP class 201 contains a total of 100 servers.

¥ Switches A and B are VRRP peers.

¥ Both switches sets the track-servers-delta limit for class 201 to 10.

¥ Switch B is active for class 201.

¥ Switch A sees 90 healthy servers

As long as machine B see 81 or more healthy servers, it remains active. If switch B sees 80 or fewer

healthy servers, then the switch A will attempt to preempt switch B and become active for VRRP class

201.

Tracking Failure Between VRRP Classes

By default, each VRRP class will failover independently of the other classes. If desired, you can

conÞgure one VRRP class to track another VRRP class for failover. If the tracked class fails, the tracking

class will also failover. To make one switch a complete standby for the other, you can conÞgure every

classes to failover when any other class fails. You conÞgure tracking between VRRP classes with the

configure vrrp add track-vrid command.

The tracking conÞguration must be the same on both switches.