We have an interesting situation with a dark fiber connection between two of our schools. For 15 months, the connection was great- an HP switch with 10 GB SFP on one end and a Sophos 10 GB SFO on the other. Last Friday, the connection dropped. After switching out the switch, the SFP for the switch and the SFP and port on the Sophos, the connection only came up when we replace the SFP's on both ends. It was fine until today- the connection dropped. We could only bring it back by replacing the SFP's- with 1 GB units because we did not have 10 GB replacements. Last week, our fiber provider test the fiber from both ends and it was clear all the way to other end- which is about 12 miles. We talked to them today and they remain convinced that the fiber is fine. We are going to replace the patch cables next but remain skeptical that it isn't an issue with the fiber somewhere along the line.
Does anyone have suggestions on where else to look? Thanks!
