%SFF8472-5-THRESHOLD_VIOLATION: Te1/3: Rx power high warning; Operating value: 2.0 dBm, Threshold value: 0.4 dBm.

[Saleh Baduqail]

Hi,

I am receiving following warning messages for all the 6 ports in WS-C4500X-16 which are connected to access switch 2960-X.  Fiber is Multimode and sfp at both ends are SFP-10G-LRM.

I have even tried checking by directly connecting to access switch via two new fiber patch cord and still warning appears. 

There are no errors if only SFP is inserted and no fiber connected.

Cisco IOS Software,

IOS-XE Software, Catalyst 4500 L3 Switch  Software (cat4500e-UNIVERSALK9-M), Version 03.06.07.E RELEASE SOFTWARE (fc3).

"cat4500e-universalk9.SPA.03.06.07.E.152-2.E7.bin"

031630: Apr 10 08:50:59.480: %SFF8472-5-THRESHOLD_VIOLATION: Te1/1: Rx power high warning; Operating value:   2.0 dBm, Threshold value:   0.4 dBm.
031631: Apr 10 08:50:59.915: %SFF8472-5-THRESHOLD_VIOLATION: Te1/3: Rx power high warning; Operating value:   2.0 dBm, Threshold value:   0.4 dBm.
031632: Apr 10 08:50:59.931: %SFF8472-5-THRESHOLD_VIOLATION: Te1/2: Rx power high warning; Operating value:   3.0 dBm, Threshold value:   0.4 dBm.
031633: Apr 10 08:51:02.061: %SFF8472-5-THRESHOLD_VIOLATION: Te1/4: Rx power high alarm; Operating value:   3.6 dBm, Threshold value:   3.4 dBm.
031634: Apr 10 08:51:11.240: %SFF8472-5-THRESHOLD_VIOLATION: Te1/5: Rx power high warning; Operating value:   3.1 dBm, Threshold value:   0.4 dBm.
031635: Apr 10 08:51:12.325: %SFF8472-5-THRESHOLD_VIOLATION: Te1/6: Rx power high warning; Operating value:   2.6 dBm, Threshold value:   0.4 dBm.

Interface transceiver details

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)
--------- ------------------  ----------  ---------  ---------  ---------
Te1/1       52.1                75.0        70.0         0.0       -5.0
Te1/2       55.0                75.0        70.0         0.0       -5.0
Te1/3       52.7                75.0        70.0         0.0       -5.0
Te1/4       54.3                75.0        70.0         0.0       -5.0
Te1/5       53.0                75.0        70.0         0.0       -5.0
Te1/6       53.5                75.0        70.0         0.0       -5.0


                              High Alarm  High Warn  Low Warn   Low Alarm
           Voltage            Threshold   Threshold  Threshold  Threshold
Port       (Volts)            (Volts)     (Volts)    (Volts)    (Volts)
---------  ---------------    ----------  ---------  ---------  ---------
Te1/1      3.30                  3.60        3.50        3.10       3.00
Te1/2      3.28                  3.60        3.50        3.10       3.00
Te1/3      3.30                  3.60        3.50        3.10       3.00
Te1/4      3.30                  3.60        3.50        3.10       3.00
Te1/5      3.30                  3.60        3.50        3.10       3.00
Te1/6      3.30                  3.60        3.50        3.10       3.00


           Optical            High Alarm  High Warn  Low Warn   Low Alarm
           Transmit Power     Threshold   Threshold  Threshold  Threshold
Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
---------  -----------------  ----------  ---------  ---------  ---------
Te1/1       -0.5                 3.4         0.4        -6.5      -10.5
Te1/2       -0.6                 3.4         0.4        -6.5      -10.5
Te1/3       -0.5                 3.4         0.4        -6.5      -10.5
Te1/4       -0.8                 3.4         0.4        -6.5      -10.5
Te1/5       -2.8                 3.4         0.4        -6.5      -10.5
Te1/6       -1.6                 3.4         0.4        -6.5      -10.5


           Optical            High Alarm  High Warn  Low Warn   Low Alarm
           Receive Power      Threshold   Threshold  Threshold  Threshold
Port       (dBm)              (dBm)       (dBm)      (dBm)      (dBm)
-------    -----------------  ----------  ---------  ---------  ---------
Te1/1        2.1                 3.4         0.4        -8.4      -12.4
Te1/2        3.0                 3.4         0.4        -8.4      -12.4
Te1/3        2.1                 3.4         0.4        -8.4      -12.4
Te1/4        3.5                 3.4         0.4        -8.4      -12.4
Te1/5        3.1                 3.4         0.4        -8.4      -12.4
Te1/6        2.6                 3.4         0.4        -8.4      -12.4

[Leo Laohoo]

Can you try to "shut/no shut" the port?

[Saleh Baduqail]

Hello Leo,

Yes, I have already done that. still the warning appears

[johnd2310]

Hi,

What type of multimode cable do you have, OM1, OM2 OM3 or OM4? If you have OM1/OM2 multimode cable, the issue could be due the patch cord not being mode conditioning patch cable.

Thanks

John

[Saleh Baduqail]

Hi John,

Fiber patch cord cable is commscope ffxlclc42-mxf010,  which is OM4.

Regards,

Saleh

[Saleh Baduqail]

appreciate if  anyone can support for any more workaround

[Leo Laohoo]

Try logging discriminator.

[mlund]

Hï

The optical receive power is above 0,4 dBm, wich is the alarm threshold, that is the reason for the logg.

To fix this you have to decrease the power of the light, either put in a longer patchcabel (maybe a couple of hundred meters will do), or insert a 5dB damper in between the switch and the fiberpatch, or maybe if the distance is short you can try a multimode transciver instead of the singelmode transciver you are using now.

/Mikael

[Saleh Baduqail]

Hello Mlund,

There is already an attenuator connected to the fiber and transceivers are also Multimode at both the end. 

Saleh

[mlund]

Hi Saleh

The tranciever you are using is singelmode but it support also multimode fiber.

Cisco SFP-10G-LRM

1310

MMF SMF

62.5 50.0 50.0 G.652

500 400 500 -

220m 100m 220m 300m

And as you say it should work with om4.

Cisco SFP-10G-LRM module

The Cisco 10GBASE-LRM Module supports link lengths of 220m on standard Fiber Distributed Data Interface (FDDI) grade Multimode Fiber (MMF). To make sure that specifications are met over FDDI-grade, OM1 and OM2 fibers, the transmitter should be coupled through a mode conditioning patch cord. No mode conditioning patch cord is required for applications over OM3 or OM4. For additional information on mode conditioning patch cord requirements please see: https://www.cisco.com/en/US/prod/collateral/modules/ps5455/product_bulletin_c25-530836.html.

The Cisco 10GBASE-LRM Module also supports link lengths of 300m on standard Single-Mode Fiber (SMF, G.652).

I would try to see if a 10G-SR works better

/Mikael