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210 CHAPTER 15: SPANNING-TREE COMMANDS
no spanning-tree mode
Parameters
■ stp — Indicates that the Spanning Tree Protocol (STP) is enabled.
■ rstp — Indicates that the Rapid Spanning Tree Protocol (RSTP) is
enabled.
■ mstp — Indicates that the Multiple Spanning Tree Protocol (RSTP) is
enabled.
Default Configuration
STP is enabled.
Command Modes
Global Configuration mode
User Guidelines
In RSTP mode, the device uses STP when the neighbor device uses STP.
In MSTP mode, the device uses RSTP when the neighbor device uses RSTP
and uses STP when the neighbor device uses STP.
Example
The following example configures the spanning-tree protocol to RSTP.
spanning-tree
forward-time
The spanning-tree forward-time Global Configuration mode
command configures the spanning-tree bridge forward time, which is the
amount of time a port remains in the listening and learning states before
entering the forwarding state. To restore the default configuration, use
the no form of this command.
Syntax
spanning-tree forward-time seconds
no spanning-tree forward-time
Parameters
■ seconds — Time in seconds. (Range: 4-30)
console(config)# spanning-tree mode rstp