Switch User Manual

Chapter 4 Command-Line Reference 4-107
■ rstp – Rapid Spanning Tree Protocol (IEEE 802.1w)
Default Setting
rstp
Command Mode
Global Configuration
Command Usage
■ Rapid Spanning Tree Protocol
RSTP supports connections to either STP or RSTP nodes by monitoring the
incoming protocol messages and dynamically adjusting the type of protocol
messages the RSTP node transmits, as described below:
■ STP Mode – If the switch receives an 802.1D BPDU after a port’s migration
delay timer expires, the switch assumes it is connected to an 802.1D bridge and
starts using only 802.1D BPDUs.
■ RSTP Mode – If RSTP is using 802.1D BPDUs on a port and receives an RSTP
BPDU after the migration delay expires, RSTP restarts the migration delay
timer and begins using RSTP BPDUs on that port.
Example
The following example configures the switch to use Rapid Spanning Tree:
4.3.11.3 spanning-tree forward-time
Use this command to configure the spanning tree bridge forward time globally for
this switch. Use the no form to restore the default.
Syntax
spanning-tree forward-time seconds
no spanning-tree forward-time
seconds – The time in seconds. (Range: 4-30 seconds)
Console(config)#spanning-tree mode rstp
Console(config)#