Cisco Systems ONS 15310-CL manual Configuring STP and Rstp on the ML-Series Card, STP Features

C H A P T E R 7

Configuring STP and RSTP on the ML-Series Card

This chapter describes the IEEE 802.1D Spanning Tree Protocol (STP) and the ML-Series implementation of the IEEE 802.1W Rapid Spanning Tree Protocol (RSTP). It also explains how to configure STP and RSTP on the ML-Series card.

This chapter consists of these sections:

•STP Features, page 7-1

•RSTP Features, page 7-9

•Interoperability with IEEE 802.1D STP, page 7-15

•Configuring STP and RSTP Features, page 7-15

•Verifying and Monitoring STP and RSTP Status, page 7-20

STP Features

These sections describe how the spanning-tree features work:

•STP Overview, page 7-2

•Supported STP Instances, page 7-2

•Bridge Protocol Data Units, page 7-2

•Election of the Root Switch, page 7-3

•Bridge ID, Switch Priority, and Extended System ID, page 7-4

•Spanning-Tree Timers, page 7-4

•Creating the Spanning-Tree Topology, page 7-5

•Spanning-Tree Interface States, page 7-5

•Spanning-Tree Address Management, page 7-8

•STP and IEEE 802.1Q Trunks, page 7-8

•Spanning Tree and Redundant Connectivity, page 7-8

•Accelerated Aging to Retain Connectivity, page 7-9

Cisco ONS 15310-CL, ONS 15310-MA, and ONS 15310-MA SDH Ethernet Card Software Feature and Configuration Guide, R9.1 and R9.2

78-19415-01 7-1