Cisco 2950 - Catalyst Switch

Contents
xiii
Catalyst 2950 and Catalyst 2955 Switch Software Configuration Guide
78-11380-10
Configuring CPE Toggle 13-22
Configuring Syslog Export 13-22
Upgrading LRE Switch Firmware 13-23
Configuring for an LRE Upgrade 13-24
Performing an LRE Upgrade 13-24
Global Configuration of LRE Upgrades 13-25
Controller Configuration of LRE Upgrades 13-25
LRE Upgrade Details 13-26
LRE Upgrade Example 13-26
Displaying LRE Status 13-27
CHAPTER 14 Configuring STP 14-1
Understanding Spanning-Tree Features 14-1
STP Overview 14-2
Spanning-Tree Topology and BPDUs 14-3
Bridge ID, Switch Priority, and Extended System ID 14-4
Spanning-Tree Interface States 14-4
Blocking State 14-6
Listening State 14-6
Learning State 14-6
Forwarding State 14-6
Disabled State 14-7
How a Switch or Port Becomes the Root Switch or Root Port 14-7
Spanning Tree and Redundant Connectivity 14-8
Spanning-Tree Address Management 14-8
Accelerated Aging to Retain Connectivity 14-8
Spanning-Tree Modes and Protocols 14-9
Supported Spanning-Tree Instances 14-9
Spanning-Tree Interoperability and Backward Compatibility 14-10
STP and IEEE 802.1Q Trunks 14-10
Configuring Spanning-Tree Features 14-11
Default Spanning-Tree Configuration 14-11
Spanning-Tree Configuration Guidelines 14-12
Changing the Spanning-Tree Mode 14-13
Disabling Spanning Tree 14-14
Configuring the Root Switch 14-14
Configuring a Secondary Root Switch 14-16
Configuring the Port Priority 14-17
Configuring the Path Cost 14-19