Hi all,
I've got a strange one that I can't seem to work out. I've just recently moved to fiber and have stacked 3x Cisco 3750's (WS-C3750E-24TD-S) with 2x X2-10GB-SR in each 3750 to give 6 modules in total. I'm using OM3 multimode cables (3 metres) plugged into an Intel 82599EB NIC for VMWare. When I first plugged in, all transceiver stats were showing good, however over time, each interface gradually went into an alarm state with a very high signal. I'm sure I have all the right cables but not sure?
3750-10gig#sh int tenGigabitEthernet1/0/1 transceiver
Transceiver monitoring is disabled for all interfaces.
ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
If device is externally calibrated, only calibrated values are printed.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
NA or N/A: not applicable, Tx: transmit, Rx: receive.
mA: milliamperes, dBm: decibels (milliwatts).
Optical Optical
Temperature Voltage Current Tx Power Rx Power
Port (Celsius) (Volts) (mA) (dBm) (dBm)
--------- ----------- ------- -------- -------- --------
Te1/0/1 37.8 + 0.00 1.3 ++ -2.8 ++ -2.6 ++
3750-10gig#sh int tenGigabitEthernet1/0/1 transceiver detail
Transceiver monitoring is disabled for all interfaces.
ITU Channel not available (Wavelength not available),
Transceiver is internally calibrated.
mA: milliamperes, dBm: decibels (milliwatts), NA or N/A: not applicable.
++ : high alarm, + : high warning, - : low warning, -- : low alarm.
A2D readouts (if they differ), are reported in parentheses.
The threshold values are calibrated.
High Alarm High Warn Low Warn Low Alarm
Temperature Threshold Threshold Threshold Threshold
Port (Celsius) (Celsius) (Celsius) (Celsius) (Celsius)
--------- ------------------ ---------- --------- --------- ---------
Te1/0/1 37.8 + 74.0 0.0 0.0 0.0
High Alarm High Warn Low Warn Low Alarm
Voltage Threshold Threshold Threshold Threshold
Port (Volts) (Volts) (Volts) (Volts) (Volts)
--------- --------------- ---------- --------- --------- ---------
Te1/0/1 0.00 0.00 0.00 0.00 0.00
High Alarm High Warn Low Warn Low Alarm
Current Threshold Threshold Threshold Threshold
Port (milliamperes) (mA) (mA) (mA) (mA)
--------- ----------------- ---------- --------- --------- ---------
Te1/0/1 1.3 ++ 0.0 0.0 0.0 0.0
Optical High Alarm High Warn Low Warn Low Alarm
Transmit Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
--------- ----------------- ---------- --------- --------- ---------
Te1/0/1 -2.8 ++ -40.0 -40.0 -40.0 -40.0
Optical High Alarm High Warn Low Warn Low Alarm
Receive Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
------- ----------------- ---------- --------- --------- ---------
Te1/0/1 -2.6 ++ -40.0 -40.0 -40.0 -40.0
All the thresholds are set to -40 too? They were set at proper values earlier but changed. IOS is c3750e-universalk9-mz.122-46.SE.
Cheers, Mike
