6-2: VLAN Port Assignments 91
Configuring Static VLANs 91
Configuring Dynamic VLANs 91
Verifying VLAN Assignments 93
6-3: Trunking 93
Enabling Trunking 93
Specifying VLANs to Trunk 96
Verifying Trunks 97
Feature Example 97
6-4: VLAN Trunking Protocol 98
Enabling VTP for Operation 98
Setting VTP Passwords 99
Changing VTP Modes 100
Enabling VTP Pruning 101
Changing VTP Versions 102
Verifying VTP Operation 102
Feature Example 103
6-5: Private VLANs 104
Configuring Private VLANs 105
Configuring Private Edge VLANs 106
Verifying Private VLAN Operation 107
Feature Example 107
Chapter 7 Spanning Tree Protocol (STP) 111
7-1: STP Operation 111
STP Process 112
STP Tiebreakers 113
Path Costs 113
STP Port States 114
STP Topology Changes 114
Improving STP Stability 115
STP Operation Example 115
7-2: STP Configuration 116
Displaying Information About STP 120
STP Configuration Examples 120
Poor STP Root Placement 120
STP Load Balancing 122
xii Cisco LAN Switching Configuration Handbook
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