American Dynamics VideoEdge User Manual download pdf (Page 231)

NVR Failover

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It is important to note when you are configuring storage for a secondary NVR, the storage

configuration must be able to support recording of any camera configurations set up on any of the

primary NVRs it is monitoring.

Note

For seamless playback on victor unified client the primary and secondary NVRs must all share the

same username and password.

The secondary NVR must have at least the same processing power as the largest primary NVR it

is protecting and must be licensed for at least as many cameras as the largest associated primary

NVR.

For VideoEdge Hybrid Appliances, the secondary NVR must have at least as many analog inputs

the largest primary NVR.

The network connection of the secondary N

VR should have the same capability as the network

connection from the primary NVRs to the client. If, for example, the secondary NVR is connected

through a lower bandwidth connection than the primary NVR, you will notice a difference in

performance when the secondary NVR is active if the primary NVR fails.

Failover Advanced Configuration

You can edit the default Failover Advanced configuration settings. The Failover Advanced

configuration settings dictate how often the secondary NVR polls the primary NVR to confirm its

current state.

There are three parameters which can be configured:

• Polli

ng Interval - This is how often the secondary NVR checks the primary NVR. The Polling

Interval has a default of 10, this means the secondary NVR will check the primary NVR(s) every

10 seconds.

• Ret

ry Count - This is the number of polling failures until the primary NVR is considered to be

inoperable and Failover should begin. The Retry Count has a default of 3, this means the

secondary NVR will try 3 times to check the status of the primary NVR before failover is initiated.

• Conf

ig Update Interval -This is the interval of how often the secondary NVR downloads the

primary NVRs’ configuration. The Config Update Interval has a default value of 60, this means

the secondary NVR will check the configuration of the primary NVR(s) every 60 seconds.

Caution

The default settings for the Failover Parameters are recommended to provide the reliable operation of

the Failover function. Depending on the levels of traffic on your network you can try alternative settings. If

the secondary NVR fails to receive responses from the primary NVRs on the network (i.e. due to network

traffic), this may result in failover triggering unnecessarily.

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American Dynamics VideoEdge User Manual Page 231