Hello NetworkGuy
Keep in mind that Rapid PVST+ is simply a Cisco proprietary protocol that delivers a separate instance of RSTP (IEEE 802.1w) for each VLAN. In essence, it is the same as RSTP. Indeed, Rapid PVST+ is the default STP version on all modern Cisco switches. And actually, on Cisco switches, you can’t enable RSTP alone. You only have the option of enabling Rapid PVST+ (simply called rapid-pvst on the Cisco IOS), which is essentially RSTP on a per-VLAN basis.
Take a look at this NetworkLessons Note on the topic for more info.
Now the spanning-tree portfast edge command can be applied either globally or on an interface.
When applied globally, the syntax is as follows:
spanning-tree portfast edge { bpdufilter default | bpduguard default | default }
When applied on an interface, the syntax is like so:
spanning-tree portfast edge [ disable | trunk ]
The interface configuration always overrides the global configuration. If no such command appears in the interface configuration, then the global configuration takes effect. Take a look at the following links to the related command reference:
I hope this has been helpful!
Laz