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Configuring Active/Passive Failover

Between Two EQ/OS 10 Systems

When two Equalizers are configured into Active/Passive failover, they form a "failover pair". An Equalizer in a

failover pair is called a "peer". At any given time, only one of the Equalizers in a failover pair is actually servicing

requests sent to the cluster IP addresses defined in the configuration -- this unit is called the "active peer" or the

"current primary" Equalizer in the failover pair. The other Equalizer, called the “passive peer” or "current backup",

does not process any client requests.

Both units continually send "heartbeat probes" or "failover probes" to one another. If the current primary does not

respond to heartbeat probes, a failover occurs. In this scenario the current backup Equalizer assumes the primary

role by assigning the cluster IP addresses to its network interfaces and begins processing cluster traffic.

Configuration of failover peer definitions and options on VLAN subnets can be performed through the CLI or the

GUI.

The figure below shows the suggested sequence of steps for enabling both Active/Passive Failover and the

preliminary steps for configuring Active/Active and N+1 Failover.

Configuring VLAN (Subnet) Failover Settings (CLI)

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