A description of different fiber schedules based on various network topologies
The basic rule when connecting SFPs in a point-to-point topology is to connect Rx to Tx and connect Tx to Rx as in the diagram before. Fiber technicians should keep a good record of how all fibers are connected and to label all pigtails appropriately
In this article, we will show an example of a SLD (Single Line Diagram) for 3 topologies.
- Daisy chain
- Fan out
- Star
A Daisy chain is a common practice for connecting devices when devices are connected serially and the main cable passes through all the devices.
The main advantages of the Daisy Chain are
- It utilizes only 4 fiber cores regardless of the number of devices / HANs
- It utilizes only 2 ports on the aggregation/core Switch
The main disadvantages of Daisy Chain topology are
- Despite that, the daisy chain provides some redundancy that is limited to a single failure in one Switch or one SFP, but there are multiple simultaneous faults all the devices between the 2 faults will lose connectivity
