STP NX-OS & IOS

Cisco IOS CLI	Cisco NX-OS CLI
Configuring VLANs

vlan 10,20	vlan 10,20

Configuring Rapid PVST+

spanning-tree mode rapid-pvst	Rapid-PVST is enabled by default. spanning-tree mode rapid-pvst

Configuring the Rapid-PVST+ Bridge Priority

spanning-tree vlan 10 root primary spanning-tree vlan 20 root secondary	spanning-tree vlan 10 root primary spanning-tree vlan 20 root secondary

Configuring MST

spanning-tree mode mst	spanning-tree mode mst

Configuring a MST Instance

spanning-tree mst configuration instance 1 vlan 10 instance 2 vlan 20	spanning-tree mst configuration instance 1 vlan 10 instance 2 vlan 20

Configuring the MST Bridge Priority

spanning-tree mst 1 root primary spanning-tree mst 2 root secondary	spanning-tree mst 1 root primary spanning-tree mst 2 root secondary

Configuring STP Port Types Globally

spanning-tree portfast edge default or spanning-tree portfast network default	spanning-tree port type edge default or spanning-tree port type network default

Configuring STP Port Types per Interface

interface gigabitethernet1/1 switchport spanning-tree portfast edge or spanning-tree portfast network or spanning-tree portfast disable	interface ethernet 1/1 switchport spanning-tree port type edge or spanning-tree port type network or spanning-tree port type normal

Configuring a Trunk as an Edge Port Type

interface gigabitethernet1/1 switchport spanning-tree portfast edge trunk	interface ethernet 1/1 switchport spanning-tree port type edge trunk

Disabling PVST Simulation Globally

no spanning-tree mst simulate pvst global	no spanning-tree mst simulate pvst global

Disabling PVST Simulation per Port

interface gigabitethernet1/1 switchport spanning-tree mst simulate pvst disable	interface ethernet 1/1 switchport spanning-tree mst simulate pvst disable

Verification Command Comparison

The following table lists some useful show commands for verifying and troubleshooting a STP network configuration. The show commands are almost identical for Cisco IOS and Cisco NX-OS Software.

Cisco NX-OS STP	Cisco IOS Software STP	Command Description
show spanning-tree	show spanning-tree	Displays high level process information for all STP enabled VLANs
show spanning-tree active	show spanning-tree active	Displays all ports in an active state
show spanning-tree blockedports	show spanning-tree blockedports	Displays all ports in a blocked state
show spanning-tree detail	show spanning-tree detail	Displays detailed information per STP instance
show spanning-tree inconsistentports	show spanning-tree inconsistentports	Displays inconsistent port status
show spanning-tree interface <type>	show spanning-tree interface <type>	Displays detailed STP information for a specific interface (many sub-options)
show spanning-tree mst	show spanning-tree mst	Displays high-level MST configuration
show spanning-tree mst configuration	show spanning-tree mst configuration	Displays the MST instance configuration
show spanning-tree mst detail	show spanning-tree mst detail	Displays detailed MST information
show spanning-tree mst interface	show spanning-tree mst interface	Displays MST interface information
show spanning-tree pathcost method	-	Displays STP path cost method
show spanning-tree root	show spanning-tree root	Displays STP root information
show spanning-tree summary	show spanning-tree summary	Displays STP summary information
show spanning-tree vlan <#>	show spanning-tree vlan <#>	Displays per VLAN STP information