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Forum Discussion
M4300 24X: sudden restarts
Hi, i have since months sudden restarts with a M4300-24X (Firmware 12.0.9.3) in a single router setup. I use mostly LAGs with 2 ports for every system (Layer3+4 mode) and has disabled the most defa...
Hi,
in my case there was a progress: Because of the unsolvable problem with the Netgear support to get a replacement switch we replaced only the power supply and immediately both fans (also the chassis fan!) have almost double speed. This is decreasing the sensor/chassis temperature from 65 °C to a constant level of 54-55 °C . It seems that the max. specified temperature of 81 °C is far too high and the switch is already starting to be instable at a level of 65 °C, especially if the temperature is constant at this level.
The chassis temperature in our setup is mainly depending of the number of connected ports. We have now 18 ports (16 ports with 1GbE and 2 with 10GbE) connected and will use 4 more ports (10GbE) in the next months. I hope that this will work with this switch and its "suboptimal" ventilation design for a Base T switch: the M4300-24X is too compact/dense with the half-width and one rear exhaust fan is not optimal/enough for this long chassis depth.
It seems after 11 days uptime that the instability of my switch was mainly (hopefully) caused by the faulty power supply related to the fan control.
But otherwise it could be worth to look carefully over the default configuration settings and disable the unnecessary functions to isolate the problem.
I hope for all customers of this M4300 switch series that also the "software" problems will soon be solved, because the release notes of the firmware updates and some threads in this community forum (it's a pitty that sometimes a conclusion is missing if the case was taken over from the Netgear support) are describing instability problems in various types during the last years.
Best Regards,
Ralf
My temperatures at 3 units. I also think that these are way too high! The server room is at 19 degrees, but the switches don't get cooler. There are 2 U space above and below and the cabinets are completely cooled + MAC 65 ℃ (Unit1) 63 ℃ (Unit2) 43 ℃ (Unit3) Maximum operating temperature 81 ℃ (Unit1) 81 ℃ (Unit2) 83 ℃ (Unit3)
Dear wuebra,
as i see in your former comment, you have also unexpected restarts probably without significant log messages. Do the number of connected ports differ between your 3 units and cause the temperature differences ?
Do you see only restarts with unit 1 and 2, which have the higher temperatures, and no restart on unit 3 ?
From my experience my unit was instable at 65 "C and at the end before the power supply replacement only the additional connected serviceport caused restarts every day.
It's interesting for me, that another power supply has changed the fan control behaviour.
The Netgear support has also a CPLD patch, which should increase the fan speeds.
Can you give the output of "show environment" of your units.
Here is my situation with the replaced power supply:
Temperature Sensors: Unit Sensor Description Temp (C) State Max_Temp (C) ---- ------ ---------------- ---------- -------------- -------------- 1 1 MAC 53 Normal 81 Fans: Unit Fan Description Type Speed Duty level State ---- --- -------------- --------- ------------- ------------- -------------- 1 1 Fan-1 Fixed 5280 27% Operational 1 2 Fan-2 Fixed 4440 27% Operational
For now it is stable with this temperature between 53 and 55 "C.
Best Regards,
Ralf
hello koralle / Ralf,
are you German? the name sounds like this :)
So far unit 2 has mostly restarted. And the syslog was connected to Unit 2 :(. 1x restarted everything.
Unit 3 has only been connected for 1 week. For failover.
The support offered me a CLPD patch. I can only install it outside of business hours.
here is my environment.Unfortunately I have a lot less fan revolutions :(
Temperature Sensors: Unit Sensor Description Temp (C) State Max_Temp (C) ---- ------ ---------------- ---------- -------------- -------------- 1 1 MAC 64 Normal 81 2 1 MAC 63 Normal 81 3 1 MAC 43 Normal 83 3 2 System 52 Normal 83 Fans: Unit Fan Description Type Speed Duty level State ---- --- -------------- --------- ------------- ------------- -------------- 1 1 Fan-1 Fixed 3240 16% Operational 1 2 Fan-2 Fixed 2880 16% Operational 2 1 Fan-1 Fixed 3240 16% Operational 2 2 Fan-2 Fixed 2880 16% Operational 3 1 Fan-1 Fixed 3240 16% Operational 3 2 Fan-2 Fixed 2760 16% Operational
Dear wuebra,
the fan speeds/duty level of your units are at the same level, which i've had with the "faulty" power supply.
The CPLD Patch (dev cpldUpdate(/media/usb-storage/XSM4324CS_V00_111419.jbc,0); ), which the Netgear Support has given to me, could be applied without reboot or disruption.
But this patch hasn't helped much, but maybe you had another patch.
I would predict, that your units 1 and 2 would be stable, if you had the suitable fan speeds.
Netgear should explain, how the fan control is working and why a power supply is controlling the speeds.
Best Regards,
Ralf
PS: I'm german ;-)
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