Configuring H.248 Timers

You can configure H.248 timers for the PGCP connection between the VPG and the PGC. See clause 9.2 and annex D of the Gateway control protocol v3, ITU-T Recommendation H.248.1, September 2005, for details about these timers.

Step-by-Step Procedure

To configure H.248 timers for the PGCP connection between the VPG and the PGC:

1. Access the configuration of the H.248 timers.
   [edit services pgcp]
   user@host#edit gateway vpg-1 h248-timers
2. Configure the value of the average acknowledgment delay (AAD) that the VPG uses before the first AAD is measured.
   [edit services pgcp gateway vpg-1 h248-timers]
   user@host#set initial-average-ack-delay 1000
3. Configure the assumed maximum network propagation delay time.
   [edit services pgcp gateway vpg-1 h248-timers]
   user@host#set maximum-net-propagation-delay 5000
4. Configure a maximum waiting delay (MWD) that is used when the VPG attempts to reconnect to the PGC. If the VPG finishes traversing its list of PGCs, and has not connected to a PGC, the VPG waits for a random value between 0 and MWD milliseconds before it attempts to reconnect to a PGC.
   [edit services pgcp gateway vpg-1 h248-timers]
   user@host#set maximum-waiting-delay 10000
5. Configure the maximum time that a transaction can be kept alive. When this time expires, the packet gateway considers the PGC to be down.
   [edit services pgcp gateway vpg-1 h248-timers]
   user@host#set tmax-retransmission-delay 25000

Related Topics

• Chapter 27, Summary of Packet Gateway Configuration Statements in JUNOS Services Interfaces Configuration Guide.