[Skunkworks] STP convergence & MST

Hey skunks I need to implement fastest convergence on VLAN's. One way is implementing PVST (Per VLAN STP) and have preset root bridges, now the question which among the following facilitate faster root bridge election and hence quicker convergence *#spanning-tree vlan **vlan_no.** priority **value** #spanning-tree vlan **vlan_no.** root **{primary |secondary}* The second way is implement Multiple Spanning Tree (MST), though I havent implemented it and dont know the shortcoming but seems faster and lighter than PVST. Question is how is the experience to those who have implemented it and speed of convergence and fault tolerance ./TheMburu -- Conservatism is the adherence to the old tried against the new untried.