Saturday, 6 February 2021

Ring Topology

What is Ring Topology?

Workstations connect to the Ring Topology. Faulty workstations can be bypassed. The connectors used tend to cause a lot of problems. Commonly used to implement token ring at 4 and 16 Mbps. Four-wire is, generally STP or UTP. More cabling required for the bus.

Each workstation is connected back to a Multiple Access Unit (MAU), which supports up to eight workstations. Additional MAU are cascaded to provide greater workstation numbers.

Ring Cable Limits: Token Ring Network Layout

Limitations

Let see the maximum categories

  • Number of workstations = 96
  • Number of 8228 MAU's = 12
  • Cable distance between an 8228 MAU and a station (not including 8' adapter cable) = 150 feet (45 meters)
  • Patch cable distance between two 8228's = 150 feet (45 meters)
  • Patch cable connecting all 8228's = 400 feet (120 meters)

Rules

  • Stations are connected into the jacks of the 8228 units
  • Patch cables interconnect RO to RI for 8228 units.
  • The last RO is connected to the first RI to form a ring.

Cable

  • Patch cables generally type 6 (26 awg) or 1 (22 awg)
  • Type 1 for lengths > 66 feet (20 meters)
  • IBM 8310574 MIC connectors
  • Alternatively, UTP with RJ45 connectors

Summary

Advantages

Disadvantages

Cable failures affect limited users

Costly Wiring

Equal access for all users

Difficult Connections

Each workstation has full access
speed to the ring

Expensive Adaptor Cards

As workstation numbers increase
performance diminishes slightly

Costly Workstation

Also Read Learn About A Star Topology

1 comment:

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