Default Spanning tree mode in nexus switches

Use show spanning tree command to check the current STP mode. As you can see, RSTP-PVST+ is the default spanning tree mode on nexus switches.

N7k (config-if-range)# show spanning-tree vlan 30 VLAN0030   Spanning tree enabled protocol rstp ---------<<<<<<<<<<<<<   Root ID    Priority    32798              Address     0005.73bc.067c              This bridge is the root              Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec   Bridge ID  Priority    32798  (priority 32768 sys-id-ext 30)              Address     0005.73bc.067c              Hello Time  2  sec  Max Age 20 sec  Forward Delay 15 sec Interface        Role Sts Cost      Prio.Nbr Type ---------------- ---- --- --------- -------- ------------------------------- - Eth1/1           Desg FWD 2         128.129  P2p Eth1/2           Desg FWD 2         128.130  P2p