When your fiber optic network stops working, begin with a structured approach. Many fiber internet problems come from dirty connectors or loose plugs, not major faults. Power. This document describes how to troubleshoot fiber optic interfaces by addressing some of the fiber optic module and cabling specifications. There are no specific requirements for this document. This includes Doppler. I want to connect SW1 to SW3 via SFP fibre and SW2 to SW3 via SFP fibre; but the status stays Link down Protocol down. Slow Internet Speeds Slow internet speeds can be. Common causes include mismatched transceiver specifications, incompatibility between fiber cable types and the hardware they are installed in, and weak signal reception, among others. How can we troubleshoot and isolate fiber connection issues on the network with RUCKUS ICX switches or in a. This morning my ISP upgraded my Internet connection from a standard coaxial cable and Cisco modem to a fiber optic cable and Hitron modem Model Name NOVA-2004. Despite multiple attempts, the Archer AX6000 v1.