SFP
transceiver is a compact, hot-pluggable transceiver module used for
both telecommunication and data communications applications. With the increasing
high speed data transmission demands of people, products, such as SFP+, CFP and
QSFP/QSFP+ etc. have shared the market. Nonetheless, SFPs have still played an
important role in telecommunication and data communication.
As a widely and commonly used component in data
transmission, due to the incorrect operation or other factors, it is hard to
avoid facing the faults in using SFP, and sometimes even result in a bad
situation and heavy loss. This paper will help you to diagnose the SFP problems
(take cisco
sfp h10gb cu1m for example) and give some resolution tips. I hope
it would be acted as a learning tool and a reference source for both new and
experienced technicians who work in this field.
To diagnose SFP problems, you can get statistics
from the browser interface, the CLI (Command Line Interface) or an SNMP (Simple
Network Management Protocol) workstation. The most common SFP problems include
these aspects:
- Poor performance
- No connectivity
- Corrupted software
- Reduce the cable length to within the recommended distances.
- See your SFP module documentation for cabling guidelines.
No
connectivity Possible
Cause: This problem is more likely related to cabling. Using
incorrect or bad cable, or incorrect cable wiring, or STP (Shielded Twisted
Pair) checking for possible loops may probably lead to this problem. Resolution:
- Verify the pinouts are correct for the proper application of cables.
- Replace the cable with a tested good cable.
- Wait 30 seconds for the port LED to turn green.
Corrupted
software The corrupted software here we mentioned include the
following three situations. 1.The port is placed in error-disabled state
after SFP is inserted. Possible
Cause: This problem is usually caused by bad or
non-Cisco-approved SFP module(ie. the incompatible SFP). Resolution: Remove the SFP module
from the switch and replace it with a Cisco-approved module. Use the irrdisable
recovery cause GBIC-invalid global configuration command to verify the port
status, and enter a time interval to recover from the error-disable state. The
best advice is to use the Cisco original SFP or 100% compatible SFP (If you
decide to use a third-party SFP, please ensure that your supplier is assured)
that is adapted to the switch.
2.Device does not recognize the SFP
module. Possible Cause:
This problem is generally related to the qsfp
4x10g aoc7m installation. Situations, such as SFP is installed
upside dowm or does not snap into the slot can cause this problem. Resolution:
- Verify that the SFP module is not installed upside down.
- Remove the SFP module. Inspect for physical damage to the connector, the module, and the module slot.
- Replace the SFP module with a known good SFP module.
Some common error
message of Cisco Switch When Using With SFP Module Error Message: Transceiver module
inserted in port Explanation: The online insertion
and removal (OIR) facility detected a newly inserted transceiver module for the
interface specified in the error message.
Error
Message: INIT_FAILURE: Detected for transceiver module in port,
module disabled Explanation:An initialization failure
occurred for the transceiver module for the interface specified in the error
message. This condition could be caused by software, firmware, or hardware
problem. As a result of the error, the module is disabled.
Recommended
Action: Try reseating the module. Hardware replacement should
not occur first occurrence. Before requesting hardware replacement, review
troubleshooting logs with a technical support representative.
Error
Message: NOT_IDENTIFIED: Detected for transceiver module in %s,
module disabled Explanation:
The transceiver module for the interface specified in the error message could
not be identified and may not be compatible with the interface. The transceiver
module specified in the error message contains a transceiver code which could
not be correctly interpreted. As a result of the error, the module is
disabled.
Recommended
Action: Replace the module with a compatible transceiver.
Error
Message: UNSUPPORTED-TRANCEIVER: Unsupported SFP transceiver
found on board. Warranty/support may void Explanation: The transceiver
module for the interface specified in the error message is not a Cisco supported
module. As a result of the error, the module is disabled. When Cisco determines
that a fault or defect can be traced to the use of third-party transceivers
installed by a customer or reseller, then, at Cisco's discretion, Cisco may
withhold support under warranty or a Cisco support program. In the course of
providing support for a Cisco networking product Cisco might require that the
end user install Cisco transceivers if Cisco determines that removing
third-party parts will assist Cisco in diagnosing the cause of a support issue.
Recommended Action:
None.
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