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Cat 3750E X2 problem

Hallo to everyone!

I have problem with optical link between core and WAN segments.

Here is situation:

I use Catalyst 3750E(ver c3750e-universal-mz.122-52.SE) as core switch and Catalyst 6504E(ver adventerprisek9_wan-vz.122-33.SXI6) as WAN switch. After changing optical transceiver from sfp 1000BaseLH to X2 10G 10Gbase-ER in syslog I found this:

%SFF8472-5-THRESHOLD_VIOLATION: Te2/0/2: Voltage low alarm; Operating value: 0.00 V, Threshold value: 2.96 V.

%SFF8472-5-THRESHOLD_VIOLATION: Te2/0/2: Rx power high warning; Operating value:   1.0 dBm, Threshold value:   0.5 dBm.

This message appears every 10 minutes… Physical layer is checked(and SFP on this link worked perfectly). I already changed IOS on c3750e-universalk9-mz.150-1.SE3.bin(CSCts58073 Bug Details 

http://tools.cisco.com/Support/BugToolKit/search/getBugDetails.do?method=fetchBugDetails&bugId=CSCts58073

), but problem still appearing.

Here is transceiver detail:

                              High Alarm  High Warn  Low Warn   Low Alarm

          Temperature         Threshold   Threshold  Threshold  Threshold

Port       (Celsius)          (Celsius)   (Celsius)  (Celsius)  (Celsius)

--------- ------------------  ----------  ---------  ---------  ---------

Te2/0/2     36.6                74.0        70.0         0.0       -4.0

                              High Alarm  High Warn  Low Warn   Low Alarm

           Voltage            Threshold   Threshold  Threshold  Threshold

Port       (Volts)            (Volts)     (Volts)    (Volts)    (Volts)

---------  ---------------    ----------  ---------  ---------  ---------

Te2/0/2    0.00                  3.63        3.46        3.13       2.96

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Transmit Power     Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

---------  -----------------  ----------  ---------  ---------  ---------

Te2/0/2     -1.9                 4.5         0.5        -8.2      -12.2

           Optical            High Alarm  High Warn  Low Warn   Low Alarm

           Receive Power      Threshold   Threshold  Threshold  Threshold

Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)

-------    -----------------  ----------  ---------  ---------  ---------

Te2/0/2      1.0         +       4.5         0.5       -14.1      -18.4  

Please, could you help me to understand what is wrong with this config…

Best regards.

Everyone's tags (3)
2 REPLIES
Hall of Fame Super Gold

Cat 3750E X2 problem

I get this alarm all the time.  I just ignored it.

No line errors, no link flapping. 

New Member

Cat 3750E X2 problem

Thanks for replay, but may be you have advise how to switch off this message from syslog... It is pretty annoying

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