User Manual
UMN:CLI
V8102
383
9.4.8
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.
Fig. 9.34
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.
9.4.8.1
Enabling PVSTP
To enable PVSTP function, use the following command.
Command
Mode
Description
spanning-tree
vlan VLANS
Global
Activates PVSTP function.
VLANS: VLAN ID (1-4094)
