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What is the difference between Pvst and RSTP?
“RSTP” stands for “Rapid Spanning Tree Protocol” while “PVST” does the same for “Per-VLAN Spanning Tree.” RSTP is an improvement of STP (Spanning Tree Protocol) in terms of being newer and faster. The RSTP is able to respond to changes in six seconds.
What is Pvst mode in the switch?
With mode ‘pvst’, the switch uses Per-VLAN Spanning-Tree (PVST). Each VLAN runs its own instance of STP using the original 802.1d rules (non-rapid). With mode ‘rapid-pvst’, the switch also uses Per-VLAN Spanning-Tree (PVST). Each VLAN runs its own instance of STP using the updated Rapid STP rules (802.1w).
What is an advantage of Pvst+?
PVST+ is an enhancement for Common STP which separates 802.1d spanning-tree instance for each VLAN. This protocol is more efficient on the links, however it causes higher CPU and memory usage.
What is rapid Pvst+?
Rapid per VLAN Spanning Tree (Rapid PVST+) is an updated implementation of STP that allows you to create one spanning tree topology for each VLAN. Rapid PVST+ is the default Spanning Tree Protocol (STP) mode on the switch. Note. Spanning tree is used to refer to IEEE 802.1w and IEEE 802.1s.
What’s the difference between RSTP and PVST +?
PVST+ is per-VLAN spanning tree (which is the default for most cisco switches). It means that you will run an spanning-tree instance per VLAN. RSTP is rapid STP. It is an enhancement to STP.
Can a rapid-PVST + switch be used on a PVST-switch?
If you do this then it becomes important to restrict the vlans that are allowed onto the PVST+ switches to only those needed. Any vlan that is present on both a PVST+ and Rapid-PVST+ switch has to revert to 802.1d timers so you lost the benefit of Rapid-PVST+ for those vlans.
What happens when you mix RSTP and Rapid STP?
Is basically when you mix the two above. You have an instance of rapid STP running per VLAN. Also, some use MST which is another variance of STP which can group several VLANs to be part of a single MST region (and behave like RSTP inside that region).
Can a Catalyst 3750 run both RSTP and rapid PVST?
If you have interconnected two Catalyst 3750 switches, I do not see how one of them can run only RSTP and the other Rapid-PVST. On Cisco switches, there is only PVST or Rapid-PVST – Catalysts have no option of running a global RSTP for all VLANs.