CLI Guide

Layer 2 Switching Commands 825
spanning-tree mode
Use the spanning-tree mode command in Global Configuration mode to
configure the spanning-tree protocol. To return to the default configuration,
use the no spanning-tree form of this command.
Syntax
spanning-tree mode {stp | rstp | mst | pvst | rapid-pvst}
• stp — Spanning Tree Protocol (STP) is enabled.
• rstp — Rapid Spanning Tree Protocol (RSTP) is enabled.
• mst — Multiple Spanning Tree Protocol (MSTP) is enabled.
• pvst— Spanning-tree operates in STP-PV mode.
• rapid-pvst— Spanning-tree operates in RSTP-PV mode.
Default Configuration
Rapid Spanning Tree Protocol (RSTP) is enabled.
Command Mode
Global Configuration mode
User Guidelines
In RSTP mode, the switch uses STP when the neighbor switch is using STP.
In MSTP mode, the switch uses RSTP when the neighbor switch is using
RSTP and uses STP when the neighbor switch is using STP.
Only one of STP, RSTP, MSTP (RSTP), STP-PV or RSTP-PV can be enabled
on a switch. This command stops all spanning-tree instances in the current
mode and enables spanning-tree per VLAN in the new mode. By default,
RSTP is enabled.
If configuring the switch to MSTP mode, be sure to configure the MST
region name. For multiple switches to become members of the same region,
the configuration name, the configuration revision and mapping of VLANs to
MSTIs must be identical.
In the STP-PV or RSTP-PV modes, BPDUs contain per-VLAN information
instead of the common spanning-tree information (MST/RSTP).