Connect cable from switch to a known good device. Swap suspect cable with known good. 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. We have a fibre run, SM, 650 meters, with Level1 dumb switches at each end, I get Link lights at both ends, but there's no network traffic. Switch A is on the router end, devices connected to this switch get DHCP leases and can browse the internet without issue. Wavelength: Meraki SFP's use 850nm, 1310nm, and 1550nm 100 Mbit/s SFP: Not supported by any Meraki device 1 Gbit/s SFP and 10 Gbit/s SFP+ supported models can be found. This article describes steps to perform when SFP/SFP+ fiber link is not coming up. Solution Things to check if the SFP/SFP+ link is not coming up. Ensure that a compatible transceiver is used. I have seen this kind of issue on both '3750X series and 2960X series', and issue is following: - Swithes are 48- Ethernet ports PoE + 4 Fiber ports - 3750X switch = 3/4 ports are currently plugged with Cisco GBIC module. Topology goes: FortiGate -> 1048E Switch -> 124F Building Switches via 62.
