3Com XLPCI manual Operational Settings, Fifo Packet Threshold, Concurrent UDP Streams

B	CONFIGURING ADVANCED
	PACE OPTIONS

This appendix describes how to use advanced PACE options to configure operational settings and additional ranges and protocols of applications for which you have enabled PACE support.

Advanced PACE options allow you to change ranges, add protocols, and define operational settings that regulate network traffic for PACE-supported applications running on your PC. When you install a new application on your PC that you want to have supported by PACE, use the advanced PACE options to configure the new application for PACE support. Refer to the user guide that came with the PACE-supported application for specific range and protocol information.

Operational Settings

The following operational settings can be modified to regulate PACE traffic on the network.

FIFO Packet Threshold

This setting controls the number of non-PACE packets that the network driver allows in the FIFO buffer, ahead of PACE packets. A smaller number decreases the time between PACE packets, but it can also decrease performance. The recommended setting is 3.

Concurrent UDP Streams

This setting controls the number of simultaneous multimedia UDP packet streams that the network driver can handle at any given time. For many applications, the number of UDP streams is the same as the number of connections.

For example, a videoconference with three people at three different sites uses three concurrent UDP streams for the video data. The concurrent UDP streams setting must be a power of 2 (2, 4, 8, 16, and so forth), but the optimal setting varies depending on your PC and the application that you are running.