- Port number
-
Network port number used for Redundancy Servers' communication channel, use default 7132 which normally won't have conflict.
- Database Synchronization Enable
-
Enable or disable the database synchronization. Normally database has to be synchronized unless alarm, trending and report are not used, which is very very rare in SCADA project.
- Tag Synchronization Enable
-
Enable or disable the tag synchronization. This is an option to disable the run time tags synchronization when traffic is far too congested.
- NLB Enable
-
Enable or disable the Network Load Balancing (NLB) feature. NLB is employed to enhance the availability of the server applications.
- NLB Cluster IP Address
-
NLB cluster IP address is a virtual IP address required when NLB is enabled. It is set identically for all the peer servers in the cluster.

General configuring for redundancy
![[Note]](images/note.png)
Only PostgresQL is supported for database redundancy. Use of MS SQL would need its own replication module for database synchronization.