Cisco Cisco Unified IP Interactive Voice Response (IVR) 8.0(1) Administrator's Guide

The type of service determines how a master is initially elected. For example:

For the Cisco CRS Engine, the first available service becomes the master. 
That service does not surrender its position as master, even if another service 
becomes active. 

For datastore services, the best candidate is always elected as master. 

You can manually reelect a master service using the Control Center’s Reelect 
Master button. However, if the best candidate for the service is already defined 
as the master, choosing Reelect Master does not cause any changes. (For more 
information, about master and standby services, see 

.)

If the best candidate for the service is already master, Reelect Master does not 
cause any changes.

Use this button carefully, as all active calls on the current master server may be 
(if failover is available) dropped when you click Reelect. 

To reelect a master service, complete the following steps:

From the CRS Administration menu bar, choose System > Control Center.

The Control Center/Servers summary web page opens.

Select the server that is currently configured as a standby server, by clicking on 
the corresponding radio button. (Master services are labeled with a small, blue M 
icon; Standby services with a small, blue S icon.) 

Click Reelect Master.

Repeat Steps 4 and 5, as necessary.