M A G N U M 6 K S W I T C H E S , M N S - 6 K U S E R G U I D Ewherexonlimit can be from 3 to 30, default value is 4xofflimit from 3 to 127, default value is 6Syntax show flowcontrolBack PressureBack Pressure is for half duplex operations and the controls provided indicates thenumber of buffers allowed for incoming traffic before a xon/xoff message is sent.Disabled (default) – The port will not use back pressure based flow control mechanisms.Enabled – The port uses 802.3 Layer 2 back off algorithms. Back pressure basedcongestion control is possible only on half-duplex, 10-Mbps Ethernet ports. Othertechnologies are not supported on Magnum 6K family of switches.Syntax backpressure rxthreshold=whererxthreshold value can be from 3 to 127, default is 28Syntax show backpressureBackpressure and Flow control are to be used in networks in which alldevices and switches can participate in the flow control and back pressurerecognition. In most networks, these techniques are not used as not alldevices can participate in the flow control methods and notifications.Alternately, QoS and other techniques are widely used today.In the example below, the Magnum 6K family of switches are setup with flow control andback pressure.126
