Table 66. Spanning Tree Variations Dell Networking OS SupportsDell Networking Term IEEE SpecificationSpanning Tree Protocol (STP) 802 .1dRapid Spanning Tree Protocol (RSTP) 802 .1wMultiple Spanning Tree Protocol (MSTP) 802 .1sPer-VLAN Spanning Tree Plus (PVST+) Third PartyImplementation 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 (asshown in the following table). Other implementations use IEEE 802.1w costs as the default costs. Ifyou are using Dell Networking systems in a multivendor network, verify that the costs are values youintended.Configure Per-VLAN Spanning Tree PlusConfiguring 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• Configuring Spanning Trees as Hitless• PVST+ in Multi-Vendor Networks• Enabling PVST+ Extended System ID• PVST+ Sample ConfigurationsEnabling PVST+When you enable PVST+, Dell Networking OS instantiates STP on each active VLAN.1. Enter PVST context.PROTOCOL PVST modeprotocol spanning-tree pvst2. Enable PVST+.Per-VLAN Spanning Tree Plus (PVST+) 695
