SN6500B ALL Fan LED Amber

[haku1]

Hello,

I noticed that all the FAN LEDs on the two SN6500B were lit amber.
However, there were no abnormalities in the status, and it seems that it had been operating in this state for at least two year.
In the meantime, I upgraded FOS to 8.2.3d, but the issue was not resolved.

firmwareshow --history :
Firmware version history

Sno Date & Time Switch Name Slot PID FOS Version
1 Thu Feb 10 10:05:41 2018 unknown(0) 0 1986 Fabos Version 8.0.2c
2 Wed May 29 02:01:31 2018 xxxxx 0 1997 Fabos Version 8.1.0a
3 Wed May 29 02:45:54 2018 xxxxx 0 2040 Fabos Version 8.2.0a
4 Tue Sep 20 03:30:38 2023 xxxxx 0 2049 Fabos Version 8.2.3d

https://docs.broadcom.com/doc/12380320
P65 FIGURE 39 LEDs on non-port side of Brocade 6520

I have checked the documentation shown above.
---
LED color
Steady amber

Status of hardware
Fan fault for one of the following
reasons:
• A fan assembly with mismatched airflow is present.
• One or more of the fans in the fan assembly has failed
---

There, I checked the status of the hardware and found that there were no problems.
For example, fan is normal as shown below.
fanshow :
Fan 1 is Ok, speed is 2011 RPM
Fan 2 is Ok, speed is 2011 RPM
Fan 3 is Ok, speed is 2047 RPM
Fan 4 is Ok, speed is 12001 RPM
Fan 5 is Ok, speed is 12001 RPM

There was also no airflow mismatch.
psshow -v :

Power Supply #1 is OK
Airflow Direction : Non-portside Intake (Reverse)
Primary FW Version: 2.1
Secondary FW Version: 2.3
Voltage input: 208.50 V Voltage output: 12.00 V
Current input: 0.77 A Current output: 12.25 A
Power input: 160.00 W Power output: 146.00 W
Fan1 Speed: 12000.00 RPM
Inlet Air Temp: 25 (C), 77 (F)
PFC Heat Sink: 32 (C), 90 (F)

Power Supply #2 is OK
Airflow Direction : Non-portside Intake (Reverse)
Primary FW Version: 2.1
Secondary FW Version: 2.3
Voltage input: 209.00 V Voltage output: 12.00 V
Current input: 0.64 A Current output: 9.88 A
Power input: 130.00 W Power output: 118.00 W
Fan1 Speed: 12000.00 RPM
Inlet Air Temp: 24 (C), 75 (F)

chassisshow :

FAN Unit: 1
Fan Direction: Reverse (Non-portside Intake)
Time Awake: 43 days

FAN Unit: 2
Fan Direction: Reverse (Non-portside Intake)
Time Awake: 43 days

FAN Unit: 3
Fan Direction: Reverse (Non-portside Intake)
Time Awake: 43 days

FAN Unit: 4
Time Awake: 43 days

FAN Unit: 5
Time Awake: 43 days

I checked the release notes for the current FOS version, and there was no mention of this.
https://docs.broadcom.com/docs/v8.2.3d

Since a similar phenomenon has occurred on two SN6500B, we believe that it is some kind of bug rather than a hardware failure.
However, I couldn't find that information.
Is there any information on the problem where the FAN LED turns amber?

Best Regards,

[NimaG · Accepted solution]

Hello haku1,

I understand :
- You have already checked the Broadcom document that says, the amber LED indicates a hardware fault, or wrong FRU.
- You have verified that there is no hardware fault. The fans, PSUs and chassis are all of type Non-port side intake.
- FOS is at the latest v8.2.3d
- This symptom is observed on 2 switches of the same model.

This is a single bi-color LED
We don't have a known issue / bug documented for this behavior.

Please contact support, with the supportsave logs from both switches, for further investigation.

Thanks!

[haku1]

Hello NimaG,

thank you for your reply.
Since it seems to be glowing yellow-green, I conclude that it is a normal LED.

Best Regards,

[Sunitha_Mod]

Hello @haku1,

Perfect! 

We are glad to know your concern has been addressed.