Multiple Spanning Tree (MST)

[lagapidis (Lazarus Agapidis)]

Hello Rahul

@Rahul_K

It seems the changes are still not made which can cause confusion.

I will let @ReneMolenaar know to make the changes.

@Rahul_K

What is the difference between PVST, PVST+ RPVST and RPVST+?

PVST and RPVST are two Cisco proprietary protocols that were used for Cisco’s ISL, which is a proprietary trunk encapsulation protocol. ISL is no longer used in modern networks, and thus PVST and RPVST are also no longer used. Only the “+” versions are used, which support 802.1Q VLAN tagging. More info can be found at this NetworkLessons note.

@Rahul_K

PVST+ although runs STP instance per VLAN but it behaves like classic STP (802.1D) where timers are used to create a loop free topology and RPVST+ behaves like RSTP (802.1w) where “sync” mechanism is used to create a loop free topology while also having STP instance per VLAN.

Yes, this is correct.

I hope this has been helpful!

Laz