I have S+RJ10 and CRS326-24G-25+RM products. Although the 10g module is not used, its temperature rises and turns itself off for 10 minutes. It turns off again about 16 minutes after it is turned on. it goes on like this all the time. The interesting thing is that I removed this port from network use because of these breaks, only its cable is plugged in.
Not much new: http://forum.mikrotik.com/t/sfp-module-is-extremely-hot/117746/49
Using fiber is a cooler solution if possible.
Not much new: http://forum.mikrotik.com/t/sfp-module-is-extremely-hot/117746/49
Using fiber is a cooler solution if possible.
ok but what about this purchased product
Sorry for the double post.
The product page of the SFP states: “S+RJ10 module is supported also on devices with passive cooling, but may require an extra cooling.”
Source: https://mikrotik.com/product/s_rj10
Yours may be defective but these boys are know that you fry eggs on them…very small eggs.
S+RJ10 unfortunally gets insanley hot. 89 degress is just way to hot to function properly.
Last summer, when it got close to 40C around here, the two S+RJ10s I have in use (one in a CRS309 and another in a RB4011, both passively cooled devices) reached 100C and lived to tell the tale. They didn’t even switch off; just soldiered on.
But I second the use of fiber if at all possible. Lots cheaper and lots cooler.
These tests are all run using CRS326-24G-2S+ switches.
Running the RJ10 is not possible at 10Gbit/s on the CRS326-24G-2S+. It will hit 95°C in less than 10 minutes even without load @ 22°C ambient.
Adding small heat sinks can help a few degrees, making the unit level out at 94-95°C @ 22°C ambient, the minute ambient rises unit thermal limits again.
We have found there is a 20°C difference between running the RJ10 at 10Gbit/s and at 5Gbit/s. But since ROS does not honor any changes to the advertised speeds there is only one way to get the unit to negotiate 5Gbit/s. Make the cable of sufficiently poor quality until only 5Gbit/s is possible and the device will fall inline.
We do a lot of newer office buildings that all have CAT6 or 6A, that will link at 10Gbit/s, but we found that replacing the high grade patch cable on one end with 1-2 meters of CAT5e will make the RJ10 negotiate 5Gbit/s every time and temperature on a passively cooled unit drops to a steady 75°C.
Length of the CAT5 will obvs depend on the quality and length of the full run, but maybe someone can test a CAT3 insert on a very short run? (e.g. this coupler rated at cat 3)
