Pre-emption Timer

This is the time in seconds that a connection must have been open before it can be closed (pre-empted). If all X.25 virtual circuits available to IP are in use and an IP packet arrives for transmission to a new destination, Solstice X.25 closes one of the existing connections--the one that has been idle the longest. The pre-emption timer determines the minimum time a connection must be open before it can be pre-empted in this way.

When setting this timer, take into account the amount of traffic on your link and the speed your link runs at. The default is suitable for links running at 9600 bps.