H3C Technologies H3C S12500 Series Switches - Manual (Page 90)

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Displaying alarms present on a card
Use the display alarm command to display the alarms present on a card.
• In standalone mode:
display alarm
Slot Level Info
6 ERROR The board in slot 10 is faulty.
• In IRF mode:
display alarm
Chassis Slot Level Info
1 6 ERROR The board in slot 10 is faulty.
Table 20 Command output
Field Description
Level
Alarm severity. Possible values include ERROR, WARNING, NOTICE, and INFO, in the
descending order.
Info Detailed alarm information.
Verifying and diagnosing transceiver modules
At present, there are three types of commonly used transceivers, as shown in Table 21 . They can be
further divided into optical transceivers and electrical transceivers based on transmission medium.
Table 21 Commonly used transceivers
Transceiver type Application scenarios
Whether
can be an
optical
transceiver
Whether
can be an
electrical
transceiver
SFP (Small Form-factor Pluggable)
Generally used for 100M/1000M
Ethernet interfaces or POS
155M/622M/2.5G interfaces
Yes Yes
SFP+ (Enhanced 8.5 and 10 Gigabit
Small Form-factor Pluggable) Generally used for 10G Ethernet
interfaces
Yes Yes
XFP (10-Gigabit small Form-factor
Pluggable) Generally used for 10G Ethernet
interfaces
Yes No
Verifying transceiver modules
You can verify the genuineness of a transceiver module in the following ways:
• Display the key parameters of a transceiver module, including its transceiver type, connector type,
central wavelength of the transmit laser, transfer distance and vendor name.
• Display its electronic label. The electronic label is a profile of the transceiver module and contains
the permanent configuration including the serial number, manufacturing date, and vendor name.
The data is written to the storage component during debugging or testing.