DIFFERENCE BETWEEN STP MSTP PVST AND RSTP PDF

Spanning tree protocol is unique to computers. As a network protocol, it ensures a loop-free topology and prevents bridge loops and ensuing broadcast radiation. The RSTP is able to respond to changes in six seconds. Also, it has all the features of previous Cisco proprietary methods. It disables links which are not elements of the tree and leaves a single active path between two network devices. It also creates a network design to include redundant links as automatic backup paths in case of active link failures.

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Thus Discarding state merges Disabled, Blocking, Listening into one. Ideally if running a complete RSTP topology then discarding becomes practically unneeded due to the explanation below. Therefore topology change will mean a longer convergence time as the TCN has to be propagated to the root bridge first then from the root bridge out to all remaining bridges in the switching domain.

This enables faster convergence as the switch that determines the failure can advise the rest of the switching domain bridge of the TCN Topology Change Notification immediately. As the failure detection time becomes 3 x hello timer. RSTP also has two additional port states: Alternate port : Technically in discarding state but is allocated as a alternate best path to the root-bridge.

If the current root port fails the alternate port will take over. Backup port : This port is allocated as a redundant designated port. If there is already a designated port forwarding for that segment then this port will remain backup until it is needed. Technically this port is in discard state until needed. These are the main differences - Hope this helps.

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Difference between Spanning Tree Protocol (STP) and Rapid Spanning Tree Protocol (RSTP)

Thus Discarding state merges Disabled, Blocking, Listening into one. Ideally if running a complete RSTP topology then discarding becomes practically unneeded due to the explanation below. Therefore topology change will mean a longer convergence time as the TCN has to be propagated to the root bridge first then from the root bridge out to all remaining bridges in the switching domain. This enables faster convergence as the switch that determines the failure can advise the rest of the switching domain bridge of the TCN Topology Change Notification immediately.

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