01-15-2016 05:28 AM - edited 03-08-2019 03:25 AM
Hello Experts,
I have a stack of 4 cisco 3750 switches and its making lot of noise since last one week. Please have a look at the outputs below
S3N-100-ASW1#sh env all
FAN 1 is OK
FAN 2 is OK
FAN PS-1 is OK
System Temperature Value: 31 Degree Celsius
System Temperature State: GREEN
Yellow Threshold : 46 Degree Celsius
Red Threshold : 60 Degree Celsius
SW PID Serial# Status Sys Pwr PoE Pwr Watts
--- ------------------ ---------- --------------- ------- ------- -----
1A C3KX-PWR-715WAC xxxxxxxxxxx OK Good Good 715/0
1B Not Present
2A C3KX-PWR-715WAC xxxxxxxxxxx OK Good Good 715/0
2B Not Present
3B Not Present
4A C3KX-PWR-715WAC xxxxxxxxxxx OK Good Good 715/0
4B Not Present
SW Status RPS Name RPS Serial# RPS Port#
-- ------------- ---------------- ----------- ---------
1 Not Present <>
2 Not Present <>
3 Not Present <>
4 Not Present <>
S3N-100-ASW1#
Does that denote an issue with power-supply on the switch? Could power supply failure make a switch stack noisy?
01-15-2016 07:48 AM
Hey
Power supply failure shouldn't cause the noise but a fan on the way out will
Once they start to fail they get louder and louder in switches until they just stop , there easily replaced on a 3750 but I would wait till its gone unless its loud enough to cause issues for users nearby
And Unfortunatly there is no other actual command to confirm which will fail but if you get close enough to each switch you should be able to tell which switch the noise is coming from
01-15-2016 08:47 AM
Output confirms that I have a power-supply failure, right? Do I need to replace it or just a power-cycle/reboot will solve it?
01-18-2016 12:19 AM
Yes showing 1 down ,If there hot swappable just try reseat the one that's down currently but if its dead it wont be the one making the noise , sometimes reseating it can fix the issue if its software related , if it does not come back you will need to replace it
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