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Configuring the State Synchronization Plug-In Interface (SRC CLI)

 

Some external plug-ins, such as the Admission Control Plug-In (ACP) application and the SAE plug-in agent for the NIC, support state synchronization with the SAE. The state synchronization plug-in interface allows external plug-ins to maintain the state of active subscriber, service, and interface sessions without having to store intermediate versions of the state locally.

Use the following configuration statements to configure the state synchronization plug-in:

To configure the state synchronization plug-in interface:

  1. From configuration mode, access the state synchronization plug-in configuration.

  2. Configure the maximum number of plug-in events that are stored while the communication with a state synchronization plug-in is interrupted.

  3. Configure a threshold for the in-memory fail queue size to raise an SNMP event trap. When the plug-in events stored in the in-memory fail queue during synchronization exceed the configured threshold, the SRC software raises the trap but allows further events to be stored in the queue. The SNMP trap is used to notify about the constant increase in the heap usage due to events stored in the queue.

    Note

    While configuring a value for the fail-queue-size-during-sync variable, you must take into account the events that get stored in the in-memory fail queue when the NIC response rate is lesser than the ramp up rate of subscribers.

  4. Configure the maximum time that plug-in events are stored while the communication with a state synchronization plug-in is interrupted.

  5. Configure the time that the SAE waits for other plug-ins to become ready before starting a synchronization sequence.

  6. Configure the time that the SAE waits after an event before sending a ping to the remote plug-in.

  7. Configure the number of threads that the SAE maintains for plug-in synchronization.

  8. (Optional) Verify your configuration.