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STP has timer based Mechanism.
RSTP is Keepalive Mechanism.
STP has a total of 50 sec(Including Blocking mode) - (BLocking, Listening, Learning and Forwarding)
RSTP has three modes (Discarding , Learning and Forwarding ). It helps to avoid 20 sec (Blocking and lstening in STP)
The main difference between Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) and Spanning Tree Protocol (STP IEEE 802.1D) is that Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) assumes the three Spanning Tree Protocol (STP) ports states Listening, Blocking, and Disabled are same
The main difference is up time RSTP takes only 2 seconds to up your port while stp takes 30-52 seconds to up your port.
The main difference between Rapid Spanning Tree Protocol and Spanning Tree Protocol is that Rapid Spanning Tree Protocol assumes the three Spanning Tree Protocol (STP) ports states Listening, Blocking, and Disabled are same. Hence Rapid Spanning Tree Protocol places them all into a new called Discarding state. Learning and forwarding ports remain more or less the same
he main difference between Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) and Spanning Tree Protocol (STP IEEE 802.1D) is that Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) assumes the three Spanning Tree Protocol (STP) ports statesListening, Blocking, and Disabled are same (these states do not forward Ethernet frames and they do not learn MAC addresses). Hence Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) places them all into a new called Discarding state. Learning and forwarding ports remain more or less the same.
• In Spanning Tree Protocol (STP IEEE 802.1D), bridges would only send out a BPDU when they received one on their Root Port. They only forward BPDUs that are generated by the Root Switch (Root Bridge). Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) enabled switches send out BPDUs every hello time, containing current information
STP:take time to forward frame because stp has 4 state,Bloking,listening,learning,forwarding, its take 50 secound before forward frame.
RSTP:it port state discard frame or learning and forwarding.
RSTP is fastes than STP.
Rapid spanning-tree protocol has faster convergence than STP as RSTP goes to forwarding state from discarding state immediately whereas STP blocking port state that takes 50 seconds to change its state from blocking ( 20 secs) listening ( 15 secs) learning ( 15 secs ) forwarding.
Rapid spanning-tree protocol (RSTP) has faster convergence than STP because it has the discarding port state that makes the port always listening for the bridge packet data unit (BPDU) other than the STP blocking port state that takes 50 seconds to change its state from blocking ( 20 secs) listening ( 15 secs) learning ( 15 secs ) forwarding
spanning-tree depend on time even it discovers the topology it will wait for this specific time like
20 seconds for blocking,15 listening,15 learning = totally 50 seconds,
but with RSTP it sends message one it sure that no loop it will be in forwarding stat immediately.
one difference is that Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) assumes the three Spanning Tree Protocol (STP) ports states Listening, Blocking, and Disabled are same (these states do not forward Ethernet frames and they do not learn MAC addresses). Hence Rapid Spanning Tree Protocol (RSTP IEEE 802.1W) places them all into a new called Discarding state.Learning and forwarding ports remain more or less the same.
