C H A P T E R
13-1
Cisco ME 3800X and 3600X Switch Software Configuration Guide
OL-23400-01
13
Configuring STP
This chapter describes how to configure the Spanning Tree Protocol (STP) on port-based VLANs on the
Cisco ME 3800X and ME 3600X switch. The switch can use the per-VLAN spanning-tree plus (PVST+)
protocol based on the IEEE 802.1D standard and Cisco proprietary extensions, or the rapid per-VLAN
spanning-tree plus (rapid-PVST+) protocol based on the IEEE 802.1w standard. On the Cisco ME
switch, STP is enabled by default on physical interfaces.
For information about the Multiple Spanning Tree Protocol (MSTP) and how to map multiple VLANs
to the same spanning-tree instance, see
Chapter 14, “Configuring MSTP.”
For information about other
spanning-tree features such as Port Fast, root guard, and so forth, see
Chapter 15, “Configuring Optional
Spanning-Tree Features.”
Note
For complete syntax and usage information for the commands used in this chapter, see the command
reference for this release.
•
Understanding Spanning-Tree Features, page 13-1
•
Configuring Spanning-Tree Features, page 13-10
•
Displaying the Spanning-Tree Status, page 13-22
Understanding Spanning-Tree Features
•
STP Overview, page 13-2
•
Spanning-Tree Topology and BPDUs, page 13-2
•
Bridge ID, Switch Priority, and Extended System ID, page 13-3
•
Spanning-Tree Interface States, page 13-4
•
How a Switch or Port Becomes the Root Switch or Root Port, page 13-7
•
Spanning Tree and Redundant Connectivity, page 13-7
•
Spanning-Tree Address Management, page 13-8
•
Accelerated Aging to Retain Connectivity, page 13-8
•
Spanning-Tree Modes and Protocols, page 13-9
•
Supported Spanning-Tree Instances, page 13-9
•
Spanning-Tree Interoperability and Backward Compatibility, page 13-10
•
STP and IEEE 802.1Q Trunks, page 13-10
