Users Guide

The Dell Networking OS supports three other versions of spanning tree, as shown in the following table.
Table 60. Spanning Tree Versions Supported
Dell Networking Term IEEE Specification
Spanning Tree Protocol (STP) 802 .1d
Rapid Spanning Tree Protocol (RSTP) 802 .1w
Multiple Spanning Tree Protocol (MSTP) 802 .1s
Per-VLAN Spanning Tree Plus (PVST+) Third Party
Implementation Information
• The Dell Networking OS implementation of PVST+ is based on IEEE Standard 802.1w.
• The Dell Networking OS implementation of PVST+ uses IEEE 802.1s costs as the default costs (as shown
in the following table). Other implementations use IEEE 802.1w costs as the default costs. If you are
using Dell Networking systems in a multivendor network, verify that the costs are values you intended.
Configure Per-VLAN Spanning Tree Plus
Configuring PVST+ is a four-step process.
1 Configure interfaces for Layer 2.
2 Place the interfaces in VLANs.
3 Enable PVST+.
4 Optionally, for load balancing, select a nondefault bridge-priority for a VLAN.
Related Configuration Tasks
• Modifying Global PVST+ Parameters
• Modifying Interface PVST+ Parameters
• Configuring an EdgePort
• Flush MAC Addresses after a Topology Change
• Prevent Network Disruptions with BPDU Guard
• Enabling SNMP Traps for Root Elections and Topology Changes
• PVST+ in Multi-Vendor Networks
• Enabling PVST+ Extended System ID
• PVST+ Sample Configurations
Per-VLAN Spanning Tree Plus (PVST+) 783