Dell PowerSwitch S5212F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 340

Load balance and root selection All VLANs use the same forwarding topology - R2 is elected as the root and all 10G Ethernet ports have the same cost. RPVST+ changes the bridge priority of each bridge so that a different forwarding topology generates for each VLAN. To achieve RPVST+ load balancing, assign a different priority on each bridge. Enable RPVST+ By default, RPVST+ is enabled and creates an instance only after you add the first member port to a VLAN. To participate in RPVST+, portchannel or physical interfaces must be a member of a VLAN. Add all physical and port-channel interfaces to the default VLAN (VLAN1). • Enable Rapid-PVST+ mode in CONFIGURATION mode. spanning-tree mode rapid-pvst Configure RPVST+ OS10(config)# spanning-tree mode rapid-pvst View RPVST+ configuration OS10# show spanning-tree active Spanning tree enabled protocol rapid-pvst with force-version rstp VLAN 1 Executing IEEE compatible Spanning Tree Protocol Root ID Priority 32768, Address 3417.4455.667f Root Bridge hello time 2, max age 20, forward delay 15 Bridge ID Priority 32769, Address 90b1.1cf4.a523 Configured hello time 2, max age 20, forward delay 15 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID ethernet1/1/5 128.276 128 500 FWD 0 32768 3417.4455.667f 128.146 ethernet1/1/6 128.280 128 500 BLK 0 32768 3417.4455.667f 128.150 Interface Name Role PortID Prio Cost Sts Cost Link-type Edge 340 Layer 2