S+RJ10 overheating: how to reduce to 5Gbs/s ?

RouterOS General
1

Hello,

On a remote site, I’ve got a central CCR2004 connected to two Netpower16P.
All 3 devices includes S+RJ10 modules.

On one Netpower 16P, I’ve just discovered an “auto disabled due to overheating” message.

  1. What does “disabled” mean in this context as I needed the disabled/overheating module to remotely look at the Netpower 16P web interface and this interface seemed effective ?
    Does this mean some traffic but not all, is discarded as long as temperature exceeds a certain value ?

  2. When comparing two Netpowers, I saw one negociated a 5Gb/s rate while the other (when not overheating) one used a 10Gb/s rate.
    The strange thing is that all four SFP+ interfaces have the same Advertise settings:
    checked values: 10M half/full, 100M half/full, 1000M half/full
    unchecked values: 2.5G full, 5G full, 10G full
    Anyway, how can I control the outcome of Autoneg and force 2.5G or 5G ?

  3. From experience, have you met a case where 10G gave overheating issues while 5G gave none ?

Best regards


How can you force 5 Gb/s

2

I was thinking about the following process:

  • On central CCR2004,
    check all Advertise boxes but 10G box
    uncheck Auto-negociation
    click OK or Apply

  • On leaf (overheating) Netpower 16P
    check all Advertise boxes but 10G box
    uncheck Auto-negociation
    click OK or Apply

Thoughts ?

3

I have the same problem. I have a CRS326-24G-2S+IN with a S+RJ10 and lately the SFP+ module has been hitting about 110C and experiencing high packet loss. Is it possible to manually change the speed to 5 or 2.5GbE to lower the temperature?

4

10GbE SFP+ modules are in general problematic regarding overeating. Pushing high data rates through copper requires energy to compensate for signal loss.
MM Optical SFP+ modules have gotten very cheap. A pair of something like
https://www.fs.com/uk/products/11589.html?attribute=106&id=287340
is less than a single SFP+ copper module, has much better reliability and no temp issues (and it also saves 3-5W energy per port, adding up if running 24/7).

5

http://forum.mikrotik.com/t/s-rj10-turns-itself-off-due-to-overheating/150165/8

make the cable worse…