Primary Ring

Definition of Primary Ring in Network Encyclopedia.

What is Primary Ring (in FDDI)?

Primary Ring is the main ring used in the Fiber Distributed Data Interface (FDDI), which uses a dual ring topology. The primary ring is the only ring used unless it has a fault, in which case the network reconfigures itself to use the secondary ring with the data traveling in the opposite direction.

Primary Ring (FDDI)
Primary and Secondary Rings – Fiber Distributed Data Interface (FDDI)

The dual ring configuration provides FDDI with fault tolerance.

Different rings in different physical paths

Run the FDDI primary ring and secondary ring along different physical paths to make the network more redundant. An accident or disaster affecting one of the rings will not affect the other.

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