9-6CHAPTER9: STATUSMONITORINGANDSTATISTICSPort ErrorsThe Switch 9000 keeps track of errors for each port.To view port error, typeshowporterrorsThe following port error information is collected by the Switch:Link Status— The current status of the link. Options are:nReady — The port is ready to accept a link.nActive — The link is present at this port.Transmit Collisions (TX Coll) —The total number of collisions seenby the port, regardless of whether a device connected to the portparticipated in any of the collisions. This value will always be zero for afull-duplex deviceTransmit Late Collisions (TX Late)— The total number of collisionsthat have occurred after the port’s transmit window has expired. Thisvalue will always be zero for a full-duplex device.Transmit Deferred Frames (TX Def)— The total number of framesthat were transmitted by the port after the first transmission attemptwas deferred by other network traffic.Transmit Frames Lost (TX Lost)— The total number of frames thatwere not completely transmitted by the port.Transmit Errored Frames (TX Err)— The total number of frames thatwere not completely transmitted by the port due to network errors,such as late collisions or excessive collisions.Receive Bad CRC Frames (RX CRC)— The total number of framesreceived by the port that were of the correct length, but contained abad FCS value.Receive Oversize Frames (RX Over)— The total number of goodframes received by the port that were of longer than the supportedmaximum length of 1522 bytes.Receive Undersize Frames (RX Under)— The total number offrames received by the port that were less than 64 bytes long.
