I have a supermicro SYS-E300-9A as my forbidden router. The inbuilt SFP pair I used as a bonded interface to my switch (Mikrotik). The SFPs were FlyProFiber (https://www.amazon.com/gp/product/B08FX9YWMV/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1)
After months (maybe a year) they stopped working. I thought a server BIOS update was to blame. Tried a rang e of alternatives from work and settled on a new approach - a DAC (https://www.amazon.com/gp/product/B09K7DHMMW/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&th=1) which worked for a while then stopped. BIOS the same, but Opnsense updated of course…
I get “no carrier” from opnsense (not sure what other stats might help to highlight the issue).
The original SFPs work (checked elsewhere) but I’ve not yet checked the DAC.
Any ideas what is going on? I can cope with incompatible SFPs, but a time delay of months is very strange. It is definitely the server end (switch happily uses them all).
Just to add extra spice and for completeness, I have a Intel 540-T2 (dual 10Gb NIC) in the PCIE x4 slot. I know it is not working full pelt (needs x8), but I’m not expecting this to cause the issue - especially as everything seemed to work for months on end.
Finally, CPU core sensor reads 34C (about 94F) so the case can’t be that warm to affect anything.
Any ideas gratefully listened to (except spend hundreds on Intel SFPs to check…) 