I am using the Cisco SFP module of 1000BASE-LX/LH (GLC-LH-SM) on my Mikrotik RB3011UiAS-RM. The other side of the fiber is a Cisco 2960X router.
I am getting "Rx lose" error with this module. Connecting this module to a Microtik Cloud Router doesn't cause such problem and it works well.
First of all, is this module compatible with the router? Based on this post it seems it is compatible, but I wanted to make sure: viewtopic.php?t=62159#p320182
I already have tried setting turning off Auto negotiation and setting the link speed to 1Gbps, but that didn't help either.
Here is the screenshot of SFP status: