Vivotek NR9682-v2 64-Channel NVR (No HDD) - Manual (Page 180)

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180 - User's Manual
Multiple Active and Redundant groups can be created.
Active VAST servers Redundant VAST servers
CMS VAST
Active Group Redundant Group
Node 1
Node 2
Node 1
Node 2
Node 3
External storage /
NAS
Network Cameras
. . . . .
Server Group 1
Active VAST servers Redundant VAST servers
Active Group Redundant Group
Node 1 Node 1
Node 2
Server Group 2
CMS Failover
LAN
Each Redundant server can serve as the backup for ONE Active server. Depending on
the number of the Active and Redundant servers, if the number of failed servers exceeds
the number of Redundant servers, the failover will be abandoned. For example, if 2 Active
servers failed, and there is only 1 Redundant server available, the second Active server
that failed will be abandoned.
The conditions during the failover process are illustrated below: