DETAILED STEPS
PurposeCommand or Action
Enters the global configuration mode.configure terminal
Example:
Switch# configure terminal
Step 1
Configures a spanning-tree mode. All stack members run the same version
of spanning tree.
spanning-tree mode {pvst | mst |
rapid-pvst}
Step 2
Example:
Switch(config)# spanning-tree mode
pvst
•
Select pvst to enable PVST+ (the default setting).
•
Select mst to enable MSTP (and RSTP).
•
Select rapid-pvst to enable rapid PVST+.
(Recommended for Rapid PVST+ mode only) Specifies an interface to
configure, and enters interface configuration mode. Valid interfaces include
interface interface-id
Example:
Switch(config)# interface
GigabitEthernet1/0/1
Step 3
physical ports, VLANs, and port channels. The VLAN ID range is 1 to
4094. The port-channel range is 1 to 48.
(Recommended for Rapid PVST+ mode only) Specifies that the link type
for this port is point-to-point.
spanning-tree link-type point-to-point
Example:
Switch(config-if)# spanning-tree
link-type point-to-point
Step 4
If you connect this port (local port) to a remote port through a
point-to-point link and the local port becomes a designated port, the switch
negotiates with the remote port and rapidly changes the local port to the
forwarding state.
Returns to privileged EXEC mode.end
Example:
Switch(config-if)# end
Step 5
(Recommended for Rapid PVST+ mode only) If any port on the switch
is connected to a port on a legacy IEEE 802.1D switch, this command
restarts the protocol migration process on the entire switch.
clear spanning-tree detected-protocols
Example:
Switch# clear spanning-tree
detected-protocols
Step 6
This step is optional if the designated switch detects that this switch is
running rapid PVST+.
Related Topics
Spanning-Tree Modes and Protocols, on page 23
Catalyst 2960-XR Switch Layer 2 Configuration Guide, Cisco IOS Release 15.0(2)EX1
OL-29424-01 27
Configuring Spanning Tree Protocol
Changing the Spanning-Tree Mode
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