Dell N3200-ON Networking N-Series Switches CLI Reference Guide version 6.8.0 - Page 851

If configuring the switch to MSTP mode, be sure to configure the MST region name. For multiple switches to become members of the same region, the configuration name, the configuration revision and mapping of VLANs to MSTIs must be identical. In the STP-PV or RSTP-PV modes, BPDUs contain per-VLAN information instead of the common spanning-tree information (MST/RSTP). RSTP-PV maintains independent spanning tree information about each configured VLAN. RSTP-PV uses IEEE 802.1Q trunking and allows a trunked VLAN to maintain blocked or forwarding state per port on a per VLAN basis. This allows a trunk port to be forwarding for some VLANs and blocked on other VLANs. RSTP-PV extends the IEEE 802.1w standard. It supports faster convergence than IEEE 802.1D. RSTP-PV is compatible with IEEE 802.1D spanning tree. RSTP-PV sends BPDUs on all ports instead of only the root bridge sending BPDUs and supports the discarding, learning, and forwarding states. When the mode is changed to rapid-pvst, version 0 STP BPDUs are no longer transmitted and version 2 RSTP-PV BPDUs that carry per-VLAN information are transmitted on the VLANs enabled for spanning-tree. If a version 0 BPDU is seen, RSTP-PV reverts to sending version 0 BPDUs. RSTP-PV embeds support for STP-PV Indirect Link Rapid Convergence and Direct Link Rapid Convergence. There is no provision to enable or disable these features in RSTP-PV. Example The following example configures the spanning-tree protocol to MSTP. console(config)#spanning-tree mode mst spanning-tree mst configuration Use the spanning-tree mst configuration command in Global Configuration mode to enable configuring an MST region by entering the multiple spanning-tree (MST) mode. Syntax spanning-tree mst configuration Layer 2 Switching Commands 851