3Com Switch 7750 Configuration Guide

866 CHAPTER 80: DEVICE MANAGEMENT
Diagnosing pluggable transceivers
The system outputs alarm information for you to diagnose and troubleshoot faults
of pluggable transceivers. Optical transceivers customized by 3Com also support
the digital diagnosis function, which enables a transceiver to monitor the main
parameters such as temperature, voltage, laser bias current, TX power, and RX
power. When these parameters are abnormal, you can take corresponding
measures to prevent transceiver faults.
Follow these steps to display pluggable transceiver information:
Configuring Pause
Frame Protection
Mechanism
Pause frames, which can be utilized as packets to attack a network, are used in
traffic controlling. A switch that has pause frame protection mechanism enabled
discards the detected pause frames that are utilized to attack the network it
resides and logs these attacks in the logbuffer. If the switch experiences successive
pause frame attacks, it sends messages to the console to warn users.
c
CAUTION: Only A type modules support pause frame protection mechanism and
the related commands. A type modules include: 3C16860, 3C16861, LS81FS24A,
3C16858, and 3C16859.
Pause Frame Protection
Mechanism
Configuration Task
The following describes the configuration tasks of Pause Frame protection
mechanism.
Pause Frame Protection
Mechanism
Configuration Example
Network requirements
Enable pause frame protection mechanism on the module in Slot 7 of the switch.
Configuration procedure
1 Enter system view.
<SW7750> system-view
[SW7750]
2 Enable pause frame protection mechanism on the module seated in slot 7.
To do... Use the command... Remarks
Display the current alarm
information of the pluggable
transceiver(s)
display transceiver alarm
interface [ interface-type
interface-number ]
Available for all pluggable
transceivers
Display the currently
measured value of the digital
diagnosis parameters of the
anti-spoofing optical
transceiver(s) customized by
3Com
display transceiver
diagnosis interface
[ interface-type
interface-number ]
Available for anti-spoofing
pluggable optical
transceiver(s) customized by
3Com only
Table 685 Configure pause frame protection mechanism
Operation Command Description
Enter system view system-view -
Enable pause frame
protection mechanism
pause-protection enable
slot slot-number
Required
Pause frame protection
mechanism is disabled by
default.