I am presently running a Mikrotik crs312-4c-8xg-rm 10Gb switch.
It is a very good switch except that it is sitting in my living-room and making a lot of noise.
I am also running a CRS2004 router with passive cooling. Fans are present, but never running.
So I would like to change and buy a comparable switch, but completely fanless.
Is the CRS317-1G-16S+RM the only suitable solution in my case? https://mikrotik.com/product/crs317_1g_16s_rm
The CRS317-1G-16S+RM is not purely fanless as I can see two fans:
Do you confirm fans are never running in a normal situation when hardware acceleration is used?
The unit has dual redundant power supplies and passive cooling case - for hot environments two redundant fans will automatically keep the system cool if needed.
I use these in a datacenter environment and I can see in LibreNMS, that the fans have never spun up.
The datacenter ambient temperature is 22-24 degrees.
@CCR2004-1G-12S-2XS] /system/health> print
Columns: NAME, VALUE, TYPE
NAME VALUE TYPE
0 temperature 65 C
1 cpu-temperature 47 C
2 sfp-temperature 65 C
3 switch-temperature 49 C
4 fan1-speed 0 RPM
5 fan2-speed 0 RPM
6 board-temperature1 44 C
7 board-temperature2 40 C
8 psu1-state ok
9 psu2-state ok
Temperature is comparable, fans are not spinning.
Thank you ARM, this is my point of view.
I am dumping the crs312-4c-8xg-rm on Tuesday morning, unless technical support answers my support questions.
I trashed the Mikrotik crs312-4c-8xg-rm and purchased a Mikrotik ARM switch.
This is way more expansive, but I hope that it will fix fan noise issue.
Of course I don’t recommend buying the Mikrotik crs312-4c-8xg-rm for home use,
unless it is sitting in an isolated lobby, in the garage or in a server room.
I am closing Mikotik support ticket as Mikrotik engineers probably cannot fix this issue (and probably don’t care).
The CRS317-1G-16S+ arrived today.
The fans are spinning very fast because of SFP+ temperature (around 77°).
I need to check what is going on … or I will ship it back.
[admin@CRS317-1G-16S+] /system/health> print
Columns: NAME, VALUE, TYPE
NAME VALUE TYPE
0 temperature 77 C
1 cpu-temperature 41 C
2 sfp-temperature 77 C
3 fan1-speed 7785 RPM
4 fan2-speed 7785 RPM
5 psu1-state ok
6 psu2-state ok
Temperature of CRS317-1G-16S+] SFP+ connectors are:
fiber : 39 C
10Gb : 76 C
1G: 72 C
Stating Mikrotik documentation:
CPU and SFP temperature
If CPU or SFP temperatures exceed 58C, the fans will start to spin. The higher the temperature, the faster the fans will spin. For devices with PWM fans, as the CPU or SFP temperatures exceed 58C, the fans will linearly increase their RPM to try to keep the temperature at 58C if possible. For devices with DC fans, as the CPU or SFP temperatures exceed 58C, the fans will start spinning but at a higher minimum RPM by default. This may result in cooling the device to the point where the fans turn-off completely. After which the temperature may slowly increase to 58C and the fans will turn on again. Currently, there is one exception. The S+RJ10 modules have a temperature threshold of 65C before they trigger the fans. Since it’s a higher temperature threshold, the fans will start spinning at a higher initial speed to cool the device.
