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CHAPTER 2. CLI COMMANDS
spanning-tree mode
Name
spanning-tree mode — Configure the version of the Spanning Tree Protocol to run
Synopsis
spanning-tree mode { rstp | none | backup }
no spanning-tree mode
Description
The spanning-tree mode command configures the version of the spanning tree protocol for the
switch to run. The spanning-tree mode rstp command configures the switch to run the IEEE spanning tree protocol described in the IEEE 802.1D-2004 specification. This version of the spanning
tree protocol is also known as the rapid spanning tree protocol. It was originally specified in the
IEEE 802.1w specification.
The spanning-tree mode none command configures the switch to disable the spanning tree protocol. In this mode, switchport interfaces immediately forward packets once they are connected,
and no spanning tree protocol packets are generated by the switch. Spanning tree protocol packets
received by the switch are forwarded within the vlan on which they are received as normal multicast
data packets.
The spanning-tree mode backup command configures the switch to disable the spanning tree protocol and enable interface pairs configured with the switchport backup interface command.
The no form of the command reverts the spanning-tree mode to the default of rstp.
Mode
Global Configuration
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