Dell PowerSwitch S5212F-ON OS10 Enterprise Edition User Guide Release 10.4.3.0 - Page 1061

Default Command Mode Usage Information 32768. VLT-DOMAIN • After you configure a VLT domain on each peer switch and connect the two VLT peers on each side of the VLT interconnect, the system elects a primary and secondary VLT peer device. To configure the primary and secondary roles before the election process, use the primary-priority command. Enter a lower value on the primary peer and a higher value on the secondary peer. If the primary peer fails, the secondary peer (with the higher priority) takes the primary role. If the primary peer (with the lower priority) later comes back online, it is assigned the secondary role; there is no preemption. • If the priority values configured on the two VLT peers are equal, VLT uses the default primary election mechanism based on the values of the system MAC addresses of the two nodes. The VLT peer with the lowest system MAC address assumes the primary role. • If the heartbeat is up and the VLTi link goes down between the VLT peers, both the VLT peers retain their primary and secondary roles. However, the VLT LAG on the secondary VLT peer shuts down. NOTE: When you configure a priority for VLT peers using this command, the configuration is not effective immediately. The primary priority configuration comes into effect the next time election is triggered. Example OS10(conf-vlt-1)#primary-priority 2 Supported Releases 10.4.1.0 or later show spanning-tree virtual-interface Displays STP , RPVST+, and MSTP information specific to VLT. Syntax Parameters Default Command Mode Usage Information Example show spanning-tree virtual-interface [detail] detail-(Optional) Displays detailed output. Not configured EXEC None OS10# show spanning-tree virtual-interface VFP(VirtualFabricPort) of RSTP 1 is Designated Forwarding 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: 11, Received: 7 Interface Designated Name PortID Prio Cost Sts Cost Bridge ID PortID VFP(VirtualFabricPort) 0.1 0 1 FWD 0 32768 0078.7614.6062 0.1 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 Example (detail) OS10# show spanning-tree virtual-interface detail Port 1 (VFP(VirtualFabricPort)) of RSTP 1 is designated Forwarding Port path cost 1, Port priority 0, Port Identifier 0.1 Virtual Link Trunking 1061