User guide

VMS Redundancy
C-2 VMS User Guide
VMS Redundancy
Description
VMS redundancy (protection) increases the system availability of a Vipersat-
enabled network by protecting the network from a VMS server failure. In the
current release, N:1 redundancy is a monitored hot-standby configuration with
N+1 VMS servers running in parallel.
Figure C-1 Active and Standby VMS Servers, N:1 Redundancy
Each server can switch between two mutually exclusive modes of active or
standby. The active/standby hierarchy is specified through the assignment of a
priority level attribute. In the event that the active server fails, the backup server
with the highest priority is hot-switched to assume control of the satellite
network, replacing the failed server.
Note: The redundant VMS protection feature can only be activated with a valid
license in the server(s) USB Crypto-Box key.
Redundant Hot-Standby
In a redundant configuration, the VMS servers run in parallel. The VMS data-
base on the standby server(s) is continuously maintained, in real-time, as a
mirror image of the VMS database running on the active server.
Active VMS Server
Standby #1 VMS Server
Standby #2 VMS Server
Standby #N VMS Server