Stp Features; Figure 7-3 Spanning Tree And Redundant Connectivity - Cisco ONS 15454 SDH 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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STP Features, page 7-1
RSTP, 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 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 7-4
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
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