How VLANs Ease Change and Movement 5-2How VLANs Control Broadcast Traffic 5-2How VLANs Provide Extra Security 5-2An Example 5-2VLANs and the Switch 5-3The Default VLAN and Moving Ports From the DefaultVLAN 5-3Connecting VLANs to a Router 5-3Connecting Common VLANs Between Switch Units5-3Using AutoSelect VLAN Mode 5-3Using Non-routable Protocols 5-5Using Unique MAC Addresses 5-5Extending VLANs into an ATM Network 5-5VLAN Configurations 5-5Example 1 5-5Example 2 5-6Example 3 5-7Setting Up VLANs on the Switch 5-8Assigning a Port to a VLAN When Using Port VLANMode 5-10Specifying a Backbone Port 5-10Specifying that a Port is a VLT Port 5-10Setting Up VLANs Using AutoSelect VLAN Mode 5-11Specifying Information About the VLAN Server 5-11Specifying AutoSelect VLAN Mode 5-11Spanning Tree Protocol 5-12What is STP? 5-12How STP Works 5-14STP Initialization 5-14STP Stabilization 5-14STP Reconfiguration 5-14An Example 5-15STP Configurations 5-16Enabling STP on the Switch 5-17Configuring STP on the Switch 5-18Configuring the STP Parameters of VLANs 5-18Configuring the STP Parameters of Ports 5-20RMON 5-22What is RMON? 5-22About the RMON Groups 5-23Statistics 5-23History 5-23Alarms 5-23Hosts 5-23Hosts Top N 5-23Matrix 5-24Filter 5-24Capture 5-24Events 5-24Benefits of RMON 5-25How RMON Improves Your Efficiency 5-25How RMON Allows Proactive Management 5-25How RMON Reduces the Traffic Load 5-25RMON and the Switch 5-26RMON Features of the Switch 5-26About Alarm Actions 5-28About Default Alarm Settings 5-29About the Audit Log 5-296 S TATUS M ONITORING AND STATISTICSSummary Statistics 6-2Port Statistics 6-3Port Traffic Statistics 6-4Port Error Analysis 6-6Status Monitoring 6-8
