Spanning-Tree Mst Simulate Pvst Global - Cisco AP775A - Nexus Converged Network Switch 5010 Command Reference Manual

Chapter 2 Ethernet Commands
S e n d c o m m e n t s t o n x 5 0 0 0 - d o c f e e d b a c k @ c i s c o . c o m

spanning-tree mst simulate pvst global

To prevent the Multiple Spanning Tree (MST) switch from automatically interoperating with a
connecting device running Rapid per VLAN Spanning Tree (Rapid PVST+), use the no spanning-tree
mst simulate pvst global command. To return to the default settings, which is seamless operation
between MST and Rapid PVST+ on the switch, use the spanning-tree mst simulate pvst global
command.
Syntax Description This command has no keywords or arguments.
Command Default Enabled. By default, the switch interoperates seamlessly between MST and Rapid PVST+.
Command Modes
Configuration mode
Interface configuration mode
Command History Release
4.0(0)N1(1a)
Usage Guidelines
MST does not require user configuration to interoperate with Rapid PVST+. The PVST simulation
feature enables this seamless interoperability. However, you may want to control the connection between
MST and Rapid PVST+ to protect against accidentally connecting an MST-enabled port to a Rapid
PVST+-enabled port.
When you use the no spanning-tree mst simulate pvst global command, the switch running in MST
mode moves all interfaces that receive a Rapid PVST+ (SSTP) bridge protocol data unit (BPDU) into
the Spanning Tree Protocol (STP) blocking state. Those interfaces remain in the inconsistent state until
the port stops receiving Rapid PVST+ BPDUs, and then the port resumes the normal STP transition
process.
You can also use this command from the interface mode, and the configuration applies to the entire
switch.
To block automatic MST and Rapid PVST+ interoperability for specific interfaces, see the
Note
spanning-tree mst simulate pvst
This command is useful when you want to prevent accidental connection with a device not running MST.
To return the switch to seamless operation between MST and Rapid PVST+, use the spanning-tree mst
simulate pvst global command.
OL-16599-01
spanning-tree mst simulate pvst global
no spanning-tree mst simulate pvst global
Modification
This command was introduced.
command.
Cisco Nexus 5000 Series Command Reference
spanning-tree mst simulate pvst global
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