Siemens S223, S323 Configuring PVSTP/PVRSTP, Activating PVSTP/PVRSTP, A50010-Y3-C150-2-7619 217

User Manual	UMN:CLI
SURPASS hiD 6615 S223/S323 R1.5

8.3.6Configuring PVSTP/PVRSTP

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.

VLAN 3

Blocking Switch A

Switch B

Blocking

Blocking

Switch C

Fig. 8.24 Example of PVSTP

VLAN 1

Switch D

VLAN 2

8.3.6.1Activating PVSTP/PVRSTP

To configure PVSTP or PVRSTP, configure force-version in order to decide the mode. In order to decide force-version, use the following command.

Command	Mode	Description
stp pvst enable VLAN-RANGE	Bridge	Activates PVSTP or PVRSTP function.
		VLAN-RANGE : Vlan name

PVSTP is activated after selecting PVSTP in Force-version using the above command and PVRSTP is activated after selecting PVRSTP using the above commands. In PVSTP and PVRSTP, it is possible to configure only the current VLAN. If you input VLAN that does not exist, error message is displayed.

For the switches in LAN where dual path doesn’t exist, Loop does not generate even though STP function is not configured. To disable configured PVSTP, PVRSTP, use the following command.

Command	Mode	Description
stp pvst disable	Bridge	Disables PVSTP or PVRSTP in VLAN.

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