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Redundant polling

It is possible to create an element that is configured with a redundant connection. When the primary connection is no longer responding (i.e. a timeout occurs on this connection), DataMiner will automatically switch to the secondary connection (and vice versa).

In the protocol, you need to define the 2 connections and specify that redundant polling has to be used:

<Type communicationOptions="redundantPolling" relativeTimers="true" advanced="snmp:Secondary">snmp</Type>

The option "redundantPolling" in the communicationOptions attribute is required to activate the redundant polling mechanism.

Note

Redundant polling is supported with protocols that define exactly two connections of the same type. The following is supported: two SNMP, two serial, two smart-serial or two HTTP connections.

Note that for smart-serial connections, in order to get a timeout (enabling the redundant polling connections to switch) the pair must contain a response. Alternatively, you can implement logic to set the communication state using the NT_CHANGE_COMMUNICATION_STATE (249) Notify call.

See also

DataMiner Protocol Markup Language:

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