Hello Joe,
I had a spare cable at the office, that has no markings, so I was unsure if it was correctly rated or not, but I tried it and it worked.
This could be running but without any guaranty.
I only went from 1.25G → 1.25G SFP, or 10G → 10G (between the 2 CCR’s i have).
This is ok.
After a little while, it now only works with the 10G modules.
Did you try out disabling auto negotiation the on both sides?
Is it possible for a cable to work for the 10G modules but not the 1.25G?
This can surely be an answer. And it also can be working for some 1.25 GBit/s modules
and for other 1.25 GBit/s modules it would never working, surely this can all be.
There fore it is very important that the cable is matching the needed specifications
or plain what the SFP transceivers needing.
I am yet to buy some proper cabling but i found it weird that it stopped working without warning.
I consider this is very sad, but perhaps you where setting up a network loop and
it was stopping related to this behaviour and not owed to the bad cable!
There are some well known SFP “standards” or better versions and this can´t be mixed up as
you want or find it in your office. It is more something like if you drive a car, you must even
also putting the right fuel inside, or plain what the car is needing. Plain fuel, diesel or gas
this can be also not mixed by yours!
As an short example:
100Base FX Standard = 100 Mbit/s and it is not supported by MikroTik
Fast Ethernet multimode fiber connectivity (IEEE 802.3-2002)
Drives Fast Ethernet up to 2 km distances with legacy 62.5/125μm OM1 multimode fiber cables
Drives Fast Ethernet up to 2 km distances with 50/125μm laser-optimized OM3 multimode fiber cables
LC duplex connector
1000BASE-SX Standard = 1.25 GBit/s
Gigabyte Ethernet multimode fiber connectivity
Drives Gigabit Ethernet up to 1,000 m distances with 50/125µm laser-optimized OM4 multimode fiber cables
Drives Gigabit Ethernet up to 550 m distances with 50/125µm laser-optimized OM3 multimode fiber cables
Drives Gigabit Ethernet up to 275 m distances with 62.5/125ìm OM1 multimode fiber cables
LC duplex connector
Both SFP modules are looking same as the other and they would both fitting inside of the
CCR Series, but the FX standard is not working, because it is not supported by the CCR and
RouterOS and if both SFP modules comes without any bumpers on it, you will never see which
is the FX SFP modul and which is the SX SFP modul and please have a look to the cabling
numbers, distances and OM versions, so you can easily find out that not all cables will matching
for the same SFP modul!!!
The right way could only be;
- Look at your CCR model and what SFP modules are supported by the CCR
- Then buy the proper and supported SFP modules
- And then on top you must have a look what cables are matching the
specifications needed or supported by the SFP modules. That´s it.