Cabletron Systems CSX1200, CSX1000 manual Throughput Monitor Background Information, 90%

CONFIGURING CALL CONTROL

Throughput Monitor

UNDERLOAD TRIGGER NUMBER

The number of samples within the window that must be below the next lowest target capacity for the UNDERLOAD condition to occur.

UNDERLOAD WINDOW SIZE

The number of sample periods (up to 32) that you should use as the sliding window.

IDLE TRIGGER NUMBER

The number of samples within the window that must be below the specified utilization for the IDLE condition to occur.

IDLE WINDOW SIZE

The number of sample periods (up to 32) that you should use as the sliding window.

IDLE PERCENT UTILIZATION

The percentage of available bandwidth on the last connection that traffic samples must fall below for the connection to be considered IDLE.

Note: The system monitors for the IDLE condition when only one connection to a site exists, and that connection is a switched connection.

THROUGHPUT MONITOR BACKGROUND INFORMATION

A powerful feature of the CyberSWITCH is its ability to add and drop calls depending on the amount of WAN traffic. If no information is being sent, the call will be terminated. The system will also make additional calls to a site if it is determined that extra bandwidth is needed.

The Bandwidth Management feature works by sampling the amount of data that is transmitted and received on the connections between two units. Each sample is compared to the levels associated with the different conditions. The results of these comparisons are kept in a sliding window. The window size, number of samples that trigger an event, and sampling frequency are configurable.

The default Throughput Monitor configuration will work for initial installation. These parameters can be changed to better match the bandwidth needs of your location.

Correctly tuning these parameters is important in order to eliminate unnecessary data calls. The default value for the sample rate is a 5 second sample period. The following chart provides the default values for the remaining throughput monitoring parameters.

Condition	Trigger Number	Window Size	Utilization
Overload	6	12	90%
Underload	12	24	---
Idle	32	32	1%

Note: For adding calls, these parameters only apply to calls initiated by the system.

Workgroup Remote Access Switch 315