10-24-2018 03:39 PM - edited 03-01-2019 05:17 PM
I have C2960X with IOS Version 15.2(2)E6,
from the show logging
Oct 24 11:54:25.878: %SFF8472-5-THRESHOLD_VIOLATION: Gi1/0/52: Rx power high warning; Operating value: -2.9 dBm, Threshold value: -3.0 dBm.
what is the advise for this isssue?
10-24-2018 04:11 PM
That is when you have too high of a signal on the transceiver. You can either get the proper transceiver or you can get an attenuator to add loss on the cable.
First, what transceivers are you using and what type of fiber is it? What is the distance?
please mark helpful posts.
10-24-2018 04:13 PM - edited 10-24-2018 04:13 PM
I need your advice, I have several 2960 X Sws showing that I have a (%SFF8472-5-THRESHOLD_VIOLATION: RX)
C2960X Software (C2960X-UNIVERSALK9-M), Version 15.2(2)E6,
Oct 24 12:14:26.354: %SFF8472-5-THRESHOLD_VIOLATION: Gi1/0/52: Rx power high warning; Operating value: -2.9 dBm, Threshold value: -3.0 dBm.
#show int gig 1/0/52 transceiver detail
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)
--------- ------------------ ---------- --------- --------- ---------
Gi1/0/52 36.7 95.0 90.0 -40.0 -45.0
High Alarm High Warn Low Warn Low Alarm
Voltage Threshold Threshold Threshold Threshold
Port (Volts) (Volts) (Volts) (Volts) (Volts)
--------- --------------- ---------- --------- --------- ---------
Gi1/0/52 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)
--------- ----------------- ---------- --------- --------- ---------
Gi1/0/52 -0.5 4.0 3.0 -4.0 -5.0
Optical High Alarm High Warn Low Warn Low Alarm
Receive Power Threshold Threshold Threshold Threshold
Port (dBm) (dBm) (dBm) (dBm) (dBm)
------- ----------------- ---------- --------- --------- ---------
Gi1/0/52 -3.0 -2.0 -3.0 -24.9 -26.0
10-24-2018 04:16 PM
I actually need to know what type of fiber such as single mode or multi mode, and what type of SFP such as SX, LX, etc.
Please date helpful posts.
10-24-2018 04:25 PM
Port Name Status Vlan Duplex Speed Type
Gi1/0/52 connected trunk a-full a-1000 1000BaseEX SFP
Full-duplex, 1000Mb/s, link type is auto, media type is 1000BaseEX SFP
input flow-control is off, output flow-control is unsupported
regarding the other info I do not have it for the now, and by the way several SW was shown today with the same issue
10-24-2018 04:52 PM
Are the switches close enough you could just use copper? The problem is that the signal is to strong. An attenuator should solve the problem.
please mark helpful posts.
10-24-2018 04:54 PM
It would be similar to this.
https://www.amazon.com/Multimode-Fiber-Optic-Attenuator-fixed/dp/B0149VNDJK
Please rate helpful posts.
10-24-2018 04:56 PM
I would look to see what version of code you are running and make sure it is not related to a bug before making a purchase.
please rate helpful posts.
10-24-2018 06:25 PM
shut/no shut the port.
10-25-2018 12:09 PM
I tried to reset the interface (shutdown/ No shutdown) and the codes keep showing up through the show log
10-25-2018 02:14 PM
Replace the SFP modules.
11-06-2018 04:06 AM
Did you get the issue resolved?
If the links are UP and functioning well, should not be matter to worry.
This looks like cosmetic bug if you are seeing this across multiple 2960`s? You can confirm with TAC or cisco bug search:)
How long is the distance between the links? If the connected device are short, suggest using appropriate transceivers.
If related ports are not used, just shut the ports.
If it was isolated, I would suggest replacing transceiver of connected device as Leo suggested.
HTH
lek
Discover and save your favorite ideas. Come back to expert answers, step-by-step guides, recent topics, and more.
New here? Get started with these tips. How to use Community New member guide