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The varieties of spanning-tree protocols include the following:
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STP—Defined in IEEE 802.1D, this is the original standard that provided a loop-free topology in a network with redundant links. Also called Common Spanning Tree (CST), it assumed one spanning-tree instance for the entire bridged network, regardless of the number of VLANs.
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Per-VLAN Spanning Tree (PVST+)—PVST+ is a Cisco enhancement of STP that provides a separate 802.1D spanning-tree instance for each VLAN configured in the network.
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Rapid Spanning Tree Protocol (RSTP)—RSTP is defined in IEEE 802.1w. It is an evolution of STP that provides faster convergence than STP.
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Rapid Per-VLAN Spanning Tree (Rapid PVST+)—Rapid PVST+ is a Cisco enhancement of RSTP that uses PVST+ and provides a separate instance of 802.1w for each VLAN.
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Multiple Spanning Tree Protocol (MSTP)—MSTP, defined in IEEE 802.1s, maps multiple VLANs into the same spanning-tree instance. The Cisco implementation of MSTP is often referred to as Multiple Spanning Tree (MST).
Posted : 15/04/2024 9:28 pm
