Dell MX5108n OS10 Enterprise Edition User Guide for PowerEdge MX IO Modules Re - Page 626
RPVST+ configuration, Create VLT domain
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RPVST+ configuration RPVST+ mode is supported on VLT ports. Before you configure VLT on peer switches, configure RPVST+ in the network. You can use RPVST+ for initial loop prevention during the VLT startup phase. Configure RPVST+ on both the VLT peers. This creates an RPVST+ instance for every VLAN configured in the system. The RPVST+ instances in the primary VLT peer control the VLT LAGs on both the primary and secondary peers. • Enable RPVST+ on each peer node in CONFIGURATION mode. spanning-tree mode rapid-pvst Configure RPVST+ - peer 1 OS10(config)# spanning-tree mode rapid-pvst Configure RPVST+ - peer 2 OS10(config)# spanning-tree mode rapid-pvst View RPVST+ information on VLT OS10# show spanning-tree virtual-interface VFP(VirtualFabricPort) of vlan 100 is Designated Blocking Edge port: No (default) Link type: point-to-point (auto) Boundary: No, Bpdu-filter: Disable, Bpdu-Guard: Disable, Shutdown-on-Bpdu-Guard-violation: No Root-Guard: Disable, Loop-Guard: Disable Bpdus (MRecords) Sent: 7, Received: 9 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID VFP(VirtualFabricPort) 0.1 0 1 BLK 0 4196 90b1.1cf4.a602 0.1 View RPVST+ information on VLT in detail OS10# show spanning-tree virtual-interface detail Port 1 (VFP(VirtualFabricPort)) of vlan1 is designated Forwarding Port path cost 1, Port priority 0, Port Identifier 0.1 Designated root priority: 4097, address: 90:b1:1c:f4:a6:02 Designated bridge priority: 4097, address: 90:b1:1c:f4:a6:02 Designated port ID: 0.1, designated path cost: 0 Number of transitions to forwarding state: 1 Edge port: No (default) Link Type: Point-to-Point BPDU Sent: 202, Received: 42 Port 1 (VFP(VirtualFabricPort)) of vlan100 is designated Forwarding Port path cost 1, Port priority 0, Port Identifier 0.1 Designated root priority: 4196, address: 90:b1:1c:f4:a6:02 Designated bridge priority: 4196, address: 90:b1:1c:f4:a6:02 Designated port ID: 0.1, designated path cost: 0 Number of transitions to forwarding state: 1 Edge port: No (default) Link Type: Point-to-Point BPDU Sent: 101, Received: 21 Create VLT domain A VLT domain requires an ID number. Configure the same VLT domain ID on both peers, see VLT domain. The no vlt-domain command disables VLT. 626 Virtual link trunking