How to Configure Spanning-Tree Mode – Rapid PVST+
The default configuration of the spanning-tree protocol (STP) on a Catalyst 2960 Series switch is PVST+. A Catalyst 2960 series switches support PVST+, Rapid PVST+, and MST, but only one version can be active for all VLANs. Rapid PVST+ is the Cisco execution of RSTP supporting RSTP on a per-VLAN basis.
We can control the configuration of the VLAN spanning-tree instance using the Rapid PVST+ commands. A spanning-tree instance is created while an interface is assigned to a VLAN.
When all the interfaces are removed from the VLAN or moved to any other VLAN, the instance is removed. The STP switches and port parameters can be configured before a spanning-tree instance is created. These configured parameters are applied when a spanning tree instance is created.
Spanning-Tree Mode Configuration
The command for configuring the Rapid PVST+ on a Cisco switch is “spanning-tree mode rapid-pvst” The command can be used in global configuration mode. We can use the same command to change the spanning-tree mode, i.e., PVST, MST, etc.
We can The show spanning-tree vlan <vlan_number> command to show the spanning tree configuration for a specific VLAN. We can also use the show running-config command to verify the Rapid PVST+ configuration.
The point-to-point link-type parameter for Rapid PVST+ is not necessary because it is abnormal to have a shared link-type. The difference between configuring PVST+ and Rapid PVST+ is the spanning-tree mode rapid-pvst command. The command for the link-type parameter is “spanning-tree link-type point-to-point”
FAQs
What is Rapid Per-VLAN Spanning Tree (Rapid PVST)?
Rapid PVST is an updated Spanning Tree Protocol (STP) implementation that provides a separate spanning tree for each VLAN, ensuring loop-free network topology and faster convergence.
How does Rapid PVST improve network performance?
Rapid PVST improves network performance by quickly adapting to topology changes, minimizing downtime, and ensuring efficient traffic flow across multiple VLANs.
What are the key components of Rapid PVST?
The key components include determining the root bridge, electing root ports, and assigning port roles such as designated, non-designated, alternate, and backup ports.
How do you configure Rapid PVST on a network switch?
Configuration involves setting the root bridge ID, configuring port priorities, and adjusting the path cost method to ensure optimal spanning tree topology for each VLAN.
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