Network Deployment (Distributed operating systems), v8.0 > Develop and deploying applications > Develop SIP applications > Deploy SIP applications
Upgrade SIP applications
Follow these steps to upgrade SIP applications.
Use the following application upgrade procedure to install a new version of a previously installed application without any outage.
Procedure
- Install version 1 of the application in cluster 1.
- Create cluster 2.
- Set cluster 1 as the default cluster.
- Install version 2 of the application in cluster 2.
- Change the default cluster at proxy to cluster 2.
- To shut down v1, monitor PMI and watch for the application session for this application to come to zero. When it is at zero or a level you consider okay to lose, stop the application.
Results
New calls will be routed to cluster 2. Old calls will continue to be routed to cluster 1.
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