How to Block FAN messages in router syslog buffer
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09-01-2010 01:36 PM - edited 03-04-2019 09:37 AM
Hi, My cisco router sends a lot FAN messages, that its buffer gets full and i lose important messages.
is there any way i can instruct router not to capture FAN related messages in buffer some how?
Sep 1 16:24:19: %FAN-3-FAN_FAILED: Fan 2 had a rotation error reported.
Sep 1 16:24:39: %FAN-3-FAN_FAILED: Fan 1 had a rotation error reported.
Sep 1 16:24:39: %FAN-3-FAN_FAILED: Fan 2 had a rotation error reported.
Sep 1 16:24:59: %FAN-3-FAN_FAILED: Fan 1 had a rotation error reported.
Sep 1 16:24:59: %FAN-3-FAN_FAILED: Fan 2 had a rotation error reported.
Sep 1 16:25:19: %FAN-3-FAN_FAILED: Fan 1 had a rotation error reported.
Sep 1 16:25:19: %FAN-3-FAN_FAILED: Fan 2 had a rotation error reported.
Sep 1 16:25:39: %FAN-3-FAN_FAILED: Fan 1 had a rotation error reported.
Sep 1 16:25:39: %FAN-3-FAN_FAILED: Fan 2 had a rotation error reported.
Sep 1 16:25:59: %FAN-3-FAN_FAILED: Fan 1 had a rotation error reported.
Sep 1 16:25:59: %FAN-3-FAN_FAILED: Fan 2 had a rotation error reported.
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09-01-2010 06:56 PM
You might be able to use the logging filter command along with a TCL script.
http://www.cisco.com/en/US/docs/ios/netmgmt/command/reference/nm_09.html#wp1063469
But seriously, you should get the root cause taken care of - get the fan fixed or RMA the router. If you are really concern about important message, you should use a syslog server. Logging buffer will not store any data if the router is rebooted.
Regards,
jerry
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09-01-2010 06:58 PM
Good information, Jerry. +5
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09-01-2010 07:46 PM
I dont know Jerry..... These fans are noisy, cause syslog messages and consume power. Who needs them!!! I'll give ya 5 points for the effort though.
Chris
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09-03-2010 12:02 PM
.
Thank you Sir, i will check and let you know, have been busy:-s
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09-04-2010 10:37 AM
Your link directed me in right direction , here is how i managed it, full marks for you too for directing me towards resolution
logging discriminator nolog msg-body drops Fan
logging buffered discriminator nolog
logging console discriminator nolog
this link was with exact resolution
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04-21-2023 04:14 AM
Thank you for the advice! The fan was replaced but still receive the same error.
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08-24-2024 06:41 AM
I had this error on my 2811
sh env all
Main Power Supply is AC
Fan 1 OK
Fan 2 OK
Fan 3 Low RPM
Fan Speed Setting: Normal
System Temperature: 26 Celsius (normal)
Environmental information last updated 00:00:12 ago
I bought a broken 2811 and exchanged fan #3. Now I have:
sh env
Main Power Supply is AC
Fan 1 OK
Fan 2 OK
Fan 3 OK
Fan Speed Setting: Normal
System Temperature: 25 Celsius (normal)
Environmental information last updated 00:00:00 ago
The fan #3 with low RPM had a broken blade, also the bearings were going and the fan blade was not freely spinning. This fan, unlike the other 2 fans, is ducted directly to the power supply. So, doing nothing about it eventually the power supply would overheat and possibly fail.
The fan that came out was the following model:
Brand : NMB
Model : 1611KL-04W-B59
AC/DC : DC
Voltage : 12V
Current : 0.39A
Connector : 2 Wires / 3 Wires
Fan Type : Axial
Size : 40 mm x 40 mm x 28 mm
There are kits available with 3 fans in them, 2 thin ones and one thicker longer one. Fans #1 and #2 work together so if one fails there's still cooling, fan#3 is the only one for the power supply. I have noticed some of those kits advertise "quieter" fans. However, with the small 1U fans, a quieter one will move lower CFM. The only way to make a fan quieter and keep the same CFM airflow is to make it bigger.
