![]() In order to deliver redundancy within a star topology, two links to each switch are required which are then aggregated using link aggregation. Within a star topology, the core switch connects to every other switch creating a star. Ring protocols like EPSR are specifically designed to provide fast recovery to limit disruption for real-time services such as voice and video. This disruption is particularly noticeable with STP because the protocol takes some time to recover. In addition, when a change or failure occurs in the network, switches must flush their internal tables and relearn the topology of the network which can result in disruption to services such as video and IP telephony. This provides the benefit of adding redundancy as there are two paths to each switch but has the drawback of requiring a protocol such as Spanning Tree Protocol (STP) or Ethernet Protection Switching Rings (EPSR) to prevent broadcast storms from occurring. Within a ring, each switch connects to adjacent switches on either side creating a ring or loop. When it comes to network design, it is important to understand the benefits and limitations of different topologies, particularly the use of ring and star topologies.
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