Cabletron Systems CyberSWITCH CSX150 User Manual

Also see for CyberSWITCH CSX150: User guide Quick start guide

Contents

Small Office Remote Access Switch 297C ONFIGURING C ALL C ONTROLThroughput MonitorU NDERLOAD TRIGGER NUMBERThe number of samples within the window that must be below the next lowest target capacity forthe UNDERLOAD condition to occur.U NDERLOAD W INDOW S IZEThe number of sample periods (up to 32) that you should use as the sliding window.I DLE TRIGGER NUMBERThe number of samples within the window that must be below the specified utilization for theIDLE condition to occur.I DLE W INDOW S IZEThe number of sample periods (up to 32) that you should use as the sliding window.I DLE P ERCENT U TILIZATIONThe percentage of available bandwidth on the last connection that traffic samples must fall belowfor the connection to be considered IDLE.Note: The system monitors for the IDLE condition when only one connection to a site exists, andthat connection is a switched connection.THROUGHPUT M ONITOR BACKGROUND I NFORMATIONA powerful feature of the CyberSWITCH is its ability to add and drop calls depending on theamount of WAN traffic. If no information is being sent, the call will be terminated. The system willalso 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 andreceived on the connections between two units. Each sample is compared to the levels associatedwith the different conditions. The results of these comparisons are kept in a sliding window. Thewindow size, number of samples that trigger an event, and sampling frequency are configurable.The default Throughput Monitor configuration will work for initial installation. These parameterscan be changed to better match the bandwidth needs of your location.Correctly tuning these parameters is important in order to eliminate unnecessary data calls. Thedefault value for the sample rate is a 5 second sample period. The following chart provides thedefault values for the remaining throughput monitoring parameters.Note: For adding calls, these parameters only apply to calls initiated by the system.Condition Trigger Number Window Size UtilizationOverload 6 12 90%Underload 12 24 ---Idle 32 32 1%