I'm trying to connect two 2955S switches using SM fiber, I'm able get the connection up for a couple of hours and then it goes down. Sometimes goes up and down several times during the day; however I'm not able to get a stable connection. The switches are located in buildings that are located less than a mile apart.
Is there a minimal distance for connecting those devices using single mode fiber? If that is the case, what is that distance?
Should I use attenuators? If that is the case how do I calculate the required attenuation?
Thank you for your help