Configuring Front End Server Pairing

To provide disaster recovery to Front End Server pools, each pool must be paired for failover. Follow these steps to configure Front End Server pool pairing:

1. Open the Topology Builder.

2. If the two pools you want to pair are not yet defined, use Topology Builder to create these pools.

3. In Topology Builder, navigate to the Front End Server pool you want to configure pairing on. Right-click on one of the two pools, and choose Edit Properties.

4. Select Resiliency, and then select the check box Associated Backup Pool.

5. Specify the pool you want to configure as a pair. This is for voice resiliency and for pool failover. Figure 15.14 provides an example of how this configuration should look in Topology Builder.

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Figure 15.14. Specifying a backup Front End Server pool.

6. If you want to provide automatic failover for voice services (this is recommended), check the box Automatic Failover and Failback for Voice.

Tip

Consider the timing for your failover and failback intervals. Be sure not to set these values too low; however, you should note that by default failure detection is 300 seconds, or 5 minutes. If you want to provide failover more quickly than that, adjust that timer. Setting these values too low can result in failover and failback occurring too quickly in scenarios in which a pool is going up and down for whatever reason.

7. This configuration will set resiliency options on the other pool as well. When you are finished, use Topology Builder to publish the topology.

8. The Lync Server 2013 Deployment Wizard must now be run on all Front End Servers in the pools where you configured pairing. This is required to install the Lync Backup Service, which will be responsible for backing up pool data.

9. After running the Deployment Wizard on each server, run the following command in the Lync Management Shell on each server to start the Lync Backup Service:

Start-CSWindowsService -Name LyncBackup

10. After the service has been installed and started on all servers, you can now force a synchronization of the pool data. To do this, run the following commands on Lync Management Shell from any server in the pools (you need to run this only once):

Click here to view code image

Invoke-CSBackupServiceSync -PoolFQDN <FQDN of the First Lync Pool>
Invoke-CSBackupServiceSync -PoolFQDN <FQDN of the Second Lync Pool>

11. To check on the status of the synchronization, run the following commands in Lync Management Shell:

Click here to view code image

Get-CSBackupServiceStatus -PoolFQDN <FQDN of the First Lync Pool>
Get-CSBackupServiceStatus -PoolFQDN <FQDN of the Second Lync Pool>

When synchronization is complete, your Front End Server pools will automatically maintain synchronization without any administrator intervention. At this point, your pools are configured for disaster recovery.

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