По умолчанию, коммутатор NEX-5020 использует RPVST+. Если требуется узнать, какой Spanning tree протокол работает с данным VLAN. Выполните следующую команду:

NEXUS-5020-1# show spanning-tree vlan 200
VLAN0200
Spanning tree enabled protocol rstp
Root ID Priority 32768
Address 001d.a1e5.ec58
Cost 1
Port 4097 (port-channel2)
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Bridge ID Priority 32984 (priority 32768 sys-id-ext 200)
Address 000d.ec6d.7b41
Hello Time 2 sec Max Age 20 sec Forward Delay 15 sec
Interface Role Sts Cost Prio.Nbr Type
---------------- ---- --- --------- -------- --------------------------------
Po1 Root FWD 1 128.4097 P2p
NEXUS-5020-1# sho spanning-tree active detail
VLAN0200 is executing the rstp compatible Spanning Tree protocol
Bridge Identifier has priority 32768, sysid 211, address 000d.ec6d.7b41
Configured hello time 2, max age 20, forward delay 15
Current root has priority 32768, address 001d.a1e5.ec58
Root port is 4097 (port-channel1), cost of root path is 1
Topology change flag not set, detected flag not set
Number of topology changes 1 last change occurred 0:13:54 ago from port-channel1
Times: hold 1, topology change 35, notification 2
hello 2, max age 20, forward delay 15
Timers: hello 0, topology change 0, notification 0
NEXUS-5020-1# show spanning-tree summary
Switch is in rapid-pvst mode
Root bridge for: none
Port Type Default is disable
Edge Port [PortFast] BPDU Guard Default is disabled
Edge Port [PortFast] BPDU Filter Default is disabled
Bridge Assurance is disabled
Loopguard Default is disabled
Pathcost method used is short
Name Blocking Listening Learning Forwarding STP Active
---------------------- -------- --------- -------- ---------- ----------
VLAN0200 0 0 0 1 1
---------------------- -------- --------- -------- ---------- ----------
1 vlan 0 0 0 1 1