rapid-pvst+,rapid-pvst and pvst .. which will converge first ?

[kaustav.gupta]

Hi,

In a LAN where there are 3 regions of rapid-pvst+(core switch),rapid-pvst and pvst (access switch). How will be network converge during a direct or indirect link failure ? Which stp mode will converge first ?

regs

kas

[aghaznavi]

Rapid-Per-VLAN-Spanning Tree (Rapid-PVST) provides faster convergence of the spanning tree by using Rapid Spanning Tree Protocol (RSTP) with the existing configuration for PVST+. Independent VLANs run their own RSTP instance. Dynamic entries are flushed immediately on a per-port basis upon receiving a topology change. Rapid-PVST uses the existing configuration for PVST+; however, Rapid-PVST uses RSTP to provide faster convergence. Independent VLANs run their own RSTP instance.

The total convergence time will depend on the number of vlans and the number of mac addresses on the trunk.