Configuring Pvst Simulation Per Port - Cisco AP775A - Nexus Converged Network Switch 5010 Configuration Manual

Configuring MST
Procedure
Step 1
Step 2
This example shows how to prevent the switch from automatically interoperating with a connecting switch
that is running Rapid PVST+:
switch# configure terminal
switch(config)# no spanning-tree mst simulate pvst global

Configuring PVST Simulation Per Port

MST interoperates seamlessly with Rapid PVST+. However, to prevent an accidental connection to a switch
that does not run MST as the default STP mode, you may want to disable this automatic feature. If you disable
PVST simulation, the MST-enabled port moves to the blocking state once it detects it is connected to a Rapid
PVST+-enabled port. This port remains in the inconsistent state until the port stops receiving BPDUs, and
then the port resumes the normal STP transition process.
You can block this automatic feature either globally or per port.
Procedure
Step 1
Step 2
Step 3
Step 4
Step 5
OL-16597-01
Command or Action
switch# configure terminal
switch(config)# no spanning-tree
mst simulate pvst global
Command or Action
switch# configure terminal
switch(config)# interface {{type
slot/port} | {port-channel number}}
switch(config-if)# spanning-tree mst
simulate pvst disable
switch(config-if)# spanning-tree mst
simulate pvst
switch(config-if)# no spanning-tree
mst simulate pvst
Purpose
Enters configuration mode.
Disables all interfaces on the switch from automatically
interoperating with connected switch that is running in Rapid
PVST+ mode. The default for this is enabled; that is, by
default, all interfaces on the switch operate seamlessly
between Rapid PVST+ and MST.
Purpose
Enters configuration mode.
Specifies an interface to configure, and enters interface
configuration mode.
Disables specified interfaces from automatically
interoperating with connected switch that is running in
Rapid PVST+ mode.
By default, all interfaces on the switch operate
seamlessly between Rapid PVST+ and MST.
Re-enables seamless operation between MST and Rapid
PVST+ on specified interfaces.
Sets the interface to the switch-wide MST and Rapid
PVST+ interoperation that you configured using the
spanning-tree mst simulate pvst global command.
Cisco Nexus 5000 Series Switch CLI Software Configuration Guide
Configuring PVST Simulation Per Port
195