866 CHAPTER 80: D EVICE M ANAGEMENTDiagnosing pluggable transceiversThe system outputs alarm information for you to diagnose and troubleshoot faultsof pluggable transceivers. Optical transceivers customized by 3Com also supportthe digital diagnosis function, which enables a transceiver to monitor the mainparameters such as temperature, voltage, laser bias current, TX power, and RXpower. When these parameters are abnormal, you can take correspondingmeasures to prevent transceiver faults.Follow these steps to display pluggable transceiver information:Configuring PauseFrame ProtectionMechanismPause frames, which can be utilized as packets to attack a network, are used intraffic controlling. A switch that has pause frame protection mechanism enableddiscards the detected pause frames that are utilized to attack the network itresides and logs these attacks in the logbuffer. If the switch experiences successivepause frame attacks, it sends messages to the console to warn users.c CAUTION: Only A type modules support pause frame protection mechanism andthe related commands. A type modules include: 3C16860, 3C16861, LS81FS24A,3C16858, and 3C16859.Pause Frame ProtectionMechanismConfiguration TaskThe following describes the configuration tasks of Pause Frame protectionmechanism.Pause Frame ProtectionMechanismConfiguration ExampleNetwork requirementsEnable pause frame protection mechanism on the module in Slot 7 of the switch.Configuration procedure1 Enter system view. system-view[SW7750]2 Enable pause frame protection mechanism on the module seated in slot 7.To do... Use the command... RemarksDisplay the current alarminformation of the pluggabletransceiver(s)display transceiver alarminterface [ interface-typeinterface-number ]Available for all pluggabletransceiversDisplay the currentlymeasured value of the digitaldiagnosis parameters of theanti-spoofing opticaltransceiver(s) customized by3Comdisplay transceiverdiagnosis interface[ interface-typeinterface-number ]Available for anti-spoofingpluggable opticaltransceiver(s) customized by3Com onlyTable 685 Configure pause frame protection mechanismOperation Command DescriptionEnter system view system-view -Enable pause frameprotection mechanismpause-protection enableslot slot-numberRequiredPause frame protectionmechanism is disabled bydefault.
