About PVST+
Per VLAN Rapid Spanning Tree Plus (PVST+), is an updated implementation of the Spanning Tree Protocol (STP) that allows you to create one spanning tree topology for each VLAN. PVST+ is the default STP mode on the switch and uses inter switch-link (ISL) trunking and allows a VLAN trunk to forward some VLANs while blocking other VLANs. Because PVST+ treats each VLAN as a separate network, it can load balance traffic (at Layer 2) by forwarding some VLANs on one trunk and other VLANs on another trunk without causing a spanning tree loop.
In Cisco UCS Director, PVST+ configuration is supported on the following Cisco network devices:
- Cisco Nexus 3000 Series switches
- Cisco Nexus 5000, 5500, and 5672 Series switches
- Cisco Nexus 6000 Series switches
- Cisco Nexus 7000 Series switches
- Cisco Nexus 9000 Series switches
Note |
For more detailed information about PVST+ and configuration guidelines for PVST+, see the Cisco NX-OS Software Configuration Guides. |