Stp Features - Cisco ONS 15454 Software Feature And Configuration Manual

Configuring STP and RSTP
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:
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STP Features

These sections describe how the spanning-tree features work:
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Cisco ONS 15454 SONET/SDH ML-Series Multilayer Ethernet Card Software Feature and Configuration Guide, R4.0
January 2004
STP Features, page 6-1
RSTP, page 6-9
Interoperability with IEEE 802.1D STP, page 6-15
Configuring STP and RSTP Features, page 6-15
Verifying and Monitoring STP and RSTP Status, page 6-20
STP Overview, page 6-2
Supported STP Instances, page 6-2
Bridge Protocol Data Units, page 6-2
Election of the Root Switch, page 6-3
Bridge ID, Switch Priority, and Extended System ID, page 6-4
Spanning-Tree Timers, page 6-4
Creating the Spanning-Tree Topology, page 6-4
Spanning-Tree Interface States, page 6-5
Spanning-Tree Address Management, page 6-8
STP and IEEE 802.1Q Trunks, page 6-8
Spanning Tree and Redundant Connectivity, page 6-8
Accelerated Aging to Retain Connectivity, page 6-9
C H A P T E R
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6-1