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Configuring H.248 Notification Behavior to Prevent Excessive Media Inactivity Notifications

By properly setting H.248 notification behavior properties, you can prevent a PG from sending an avalanche of media inactivity notifications that can flood the PGC and adversely affect the processing of H.248 transactions. You can also enable recording of all media inactivity events for future retrieval.

The H.248 Notification Behavior package is defined in annex E.15 of the Gateway control protocol v.3, ITU-T Recommendation H.248.1, September, 2005.

Step-by-Step Procedure

To configure default values for H.248 Notification Behavior properties:

  1. Access the configuration of H.248 application-data-inactivity-detection.
    [edit services pgcp gateway vpg-1]
    user@host#edit h248-properties application-data-inactivity-detection
  2. Turn notification on.
    [edit services pgcp gateway vpg-1 h248-properties application-data-inactivity-detection]
    user@host#set ip-flow-stop-detection regulated-notify
  3. Access the configuration of H.248 notification behavior.
    [edit services pgcp gateway vpg-1]
    user@host#edit h248-properties notification-behavior
  4. Configure the default frequency of notification messages for the media inactivity event. The PGC can override this default by requesting a different frequency. If you specify once, only one notification is sent and the PGC cannot retrieve the notification by use of an audit for the root.termination.
    [edit services pgcp gateway vpg-1 h248-properties notification-behavior]
    user@host#set notification-regulation default 10
  5. Enable retrieval of event notifications by the PGC at the [edit services pgcp gateway gateway-name h248-options] level.
    [edit services pgcp gateway vpg-1 h248-properties notification-behavior]
    user@host#edit services pgcp gateway vpg-1 h248–options
    [edit services pgcp gateway vpg-1 h248-options]
    user@host#set audit-observed-events-returns-history;
  6. Enable retrieval of time stamps of recorded notifications by the PGC.
    [edit services pgcp gateway vpg-1 h248-options]
    user@host#edit services pgcp gateway vpg-1 h248-properties
    [edit services pgcp gateway vpg-1 h248-properties]
    user@host#set event-timestamp-notification request-timestamp requested

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