Contents
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Catalyst 2950 Desktop Switch Software Configuration Guide
78-14982-01
Guidelines for Using LRE Profiles 10-7
CPE Ethernet Link Guidelines 10-7
Considerations for Connected Cisco 575 LRE CPEs 10-7
Considerations for Connected Cisco 585 LRE CPEs 10-8
Assigning a Global Profile to All LRE Ports 10-8
Assigning a Profile to a Specific LRE Port 10-9
Assigning a Global Sequence to All LRE Ports 10-9
Assigning a Sequence to a Specific LRE Port 10-10
Using Rate Selection to Automatically Assign Profiles 10-10
Precedence 10-11
Profile Locking 10-11
Link Qualification and SNR Margins 10-12
LRE Link Persistence 10-14
LRE Link Monitor 10-14
Upgrading LRE Switch Firmware 10-15
Configuring for an LRE Upgrade 10-15
Performing an LRE Upgrade 10-16
Global Configuration of LRE Upgrades 10-17
Controller Configuration of LRE Upgrades 10-17
LRE Upgrade Behavior Details 10-18
LRE Upgrade Example 10-18
CHAPTER
11 Configuring STP 11-1
Understanding Spanning-Tree Features 11-1
STP Overview 11-2
Supported Spanning-Tree Instances 11-2
Bridge Protocol Data Units 11-2
Election of the Root Switch 11-3
Bridge ID, Switch Priority, and Extended System ID 11-4
Spanning-Tree Timers 11-4
Creating the Spanning-Tree Topology 11-5
Spanning-Tree Interface States 11-5
Blocking State 11-7
Listening State 11-7
Learning State 11-7
Forwarding State 11-7
Disabled State 11-8
Spanning-Tree Address Management 11-8
STP and IEEE 802.1Q Trunks 11-8
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