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Detecting PGC Failures

The packet gateway supports the inactivity timer package defined in Gateway control protocol: Inactivity timer package H.248.14, March 2002. This feature allows the PG to detect the failure of its active PGC through message inactivity. The inactivity timer is applied to the root terminations of a VPG.

The inactivity timer package specifies a default maximum inactivity time. This timer resets each time the PG receives a message from the PGC. If the PG does not receive a message from the PGC before the maximum inactivity time expires, it sends a Notify message with the observed inactivity timeout event to the PGC. If the PGC does not reply to the message, the PG considers the PGC as failed.

Configuring the Inactivity Timer Package

Step-by-Step Procedure

To configure the inactivity timer package:

  1. Access the inactivity timeout configuration for a VPG.
    [edit services pgcp]
    user@host#edit gateway vpg-1 h248-properties inactivity-timer inactivity-timeout
  2. Specify whether the PG detects inactivity timeout events received from the PGC by default.
    [edit services pgcp gateway vpg-1 h248-properties inactivity-timer inactivity-timeout]
    user@host#set detect
  3. Specify a default value for the maximum inactivity time. The default value is used if the PGC requests that the PG detect the inactivity timeout event, but the PGC does not set a value for the maximum inactivity time.
    [edit services pgcp gateway vpg-1 h248-properties inactivity-timer inactivity-timeout]
    user@host#set maximum-inactivity-time default 24000
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