Implementation Information; Configure Per-Vlan Spanning Tree Plus; Related Configuration Tasks; Enabling Pvst - Dell Force10 Z9000 Configuration Manual

Dell Networking Term
Multiple Spanning Tree Protocol (MSTP)
Per-VLAN Spanning Tree Plus (PVST+)

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
• Configuring Spanning Trees as Hitless
• PVST+ in Multi-Vendor Networks
• Enabling PVST+ Extended System ID
• PVST+ Sample Configurations

Enabling PVST+

When you enable PVST+, Dell Networking OS instantiates STP on each active VLAN.
1. Enter PVST context.
PROTOCOL PVST mode
protocol spanning-tree pvst
2. Enable PVST+.
PROTOCOL PVST mode
no disable

Disabling PVST+

To disable PVST+ globally or on an interface, use the following commands.
• Disable PVST+ globally.
IEEE Specification
802 .1s
Third Party
Per-VLAN Spanning Tree Plus (PVST+)
569