Dell EMC SmartFabric OS10 User Guide Release 10.5.0

• 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 port channel on the secondary VLT peer shuts down.

OS10(conf-vlt-1)#primary-priority 2