How to connect 2x Netgear M4100 D12G over fibre?

JohnC_V 

Many thanks for getting back to me. 

I was on site yesterday and did a further bit of troubleshooting. 

I have factory reset both switches, left the defualt configuration on one, and changed the configuration method to "manual" on the other and also changed its IP address to "169.254.100.200" rather than the "169.254.100.100". With the GBIC module connected I can now see a red light at the end of the cable which would go in the Fibre patch pannel, but only a red light on one side of the LC connector out of the two is visable, is this normal? This scenario is now the same on both switches (which I feel is progress compared to last time). 

I have also brought both switches into the same room and connected them together via Cat5, and can successfully ping between the two switches under this setup. Its only when returning to the fibre cable arrangement where difficulty is being experienced. 

The GBIC ports have no LED's to indicate activity, and upon further inspection is seems the ports are shared with ethernet ports 11 and 12, with 11F and 12F respectivley? Having done some research I understand having cat5 cables in the shared ethernet ports can cause issues, so I can confirm that in either switch, no ethernet cables are connected to ports 11 or 12.

I also retrieved a spare (unboxed) M4100 D12G switch yesterday and ran through the same configuration as described above, with the same result. 

Regarding how to check if the ports are up / down / active, I am uncertain on how to do this. There appears to be a "monitoring" section within the interface which lists the 12 ports and LAG ports (not sure what this is). I do not see ports 11F or 12F listed, but assume if shared with ports 11 and 12 that any activity would be shown against these? I can see that ports where cat5 cables are connected appear to be recieving packets indicating their active, however ports 11 or 12 show no activity. Am I looking in the right place?