28.5.2 Combination with PVST+
A PVST+ cannot be used for protocol VLANs and MAC VLANs. Also, a PVST+ can run no more than 250 VLANs. Subsequent VLANs cannot be used. Single Spanning Tree can be used to apply a Spanning Tree Protocol to these VLANs even when a PVST+ is used.
Single Spanning Tree is applied to all VLANs for which a PVST+ is not running. The following table describes the VLANs subject to Single Spanning Tree when Single Spanning Tree is used with a PVST+.
|
Item |
VLAN |
|---|---|
|
PVST+ target VLAN |
VLANs running on a PVST+. PVST+ runs as many as 250 port VLANs automatically. |
|
Single Spanning Tree target VLAN |
251st and subsequent port VLANs |
|
VLANs for which PVST+ stops (specified by the no spanning-tree vlan command) |
|
|
Default VLANs (port VLANs with a VLAN ID of 1) |
|
|
Protocol VLANs |
|
|
MAC VLANs |