Specifications

Management Guide CLI

TigerAccess™ EE

SMC7824M/VSW 277

8.3.8 Configuring PVSTP

STP and RSPT are designed with one VLAN in the network. If a port becomes blocking

state, the physical port itself is blocked. But PVSTP (Per VLAN Spanning Tree Protocol)

and PVRSTP (Per VLAN Rapid Spanning Tree Protocol) maintains spanning tree in-

stance for each VLAN in the network. Because PVSTP treats each VLAN as a separate

network, it has the ability to load balance traffic by forwarding some VLANs on one trunk

and other VLANs. PVRSTP provides the same functionality as PVSTP with enhancement.

Switch B

Switch C

Switch D

Switch A

VLAN 1

Blocking

VLAN 3

VLAN 2

Blocking

Fig. 8.25 Example of PVSTP

To configure PVSTP, use the following steps.

Step 1

Enable STP function using the spanning-tree command.

Step 2

Decide PVSTP mode using the spanning-tree mode rapid-pvst command.

Step 3

Enable PVSTP function using the spanning-tree vlan VLANS command.

Step 4

Configure detail options if specific commands are required.

8.3.8.1 Enabling PVSTP

To enable PVSTP function, use the following command.

Command Mode Description

spanning-tree vlan VLANS Bridge

Activates PVSTP function.

VLANS: VLAN ID (1-4094)