Enterasys Networks VH-8G manual Spanning Tree Concepts

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There are five (5) states that the ports can be in for spanning tree:

•Blocking: A port in this state does not participate in the transmission of frames, thus preventing duplication arising through multiple paths existing in the active topology of the bridged LAN.

•Listening: A port in this state is preparing to participate in the transmission of frames. The transmission of frames is temporarily disabled in order to prevent temporary loops, which may occur in a bridged LAN during the lifetime of this state as the active topology of the bridged LAN changes.

•Learning: A port in this state is preparing to participate in the transmission of frames.

•Forwarding: A port in this state is participating in the transmission of frames.

•Disabled: A port in this state does not participate in the transmission of frames or the operation of the spanning tree process.

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Contents Management Guide Vertical Horizon VH-8G Gigabit Ethernet SwitchPage 9033640 9033640 Table of Contents Appendix A. Spanning Tree Concepts Snmp ManagementAppendix B. Virtual Lans Vlans Vi Table of Contents Console Port Out-of-Band Connections Configuration OptionsManagement Overview Required ConnectionsIn-Band Network Connection In-Band ConnectionsTelnet Connection Overview VH-8G User InterfaceUser Access Factory Default Settings Factory DefaultsGvrp Selection Description Main MenuDisplays/configures extended bridge capabilities provided by System Information Menu System Information MenuSystem Information Displaying System InformationParameter Description Displaying Switch VersionManagement Setup Menu Management Setup MenuNetwork Configuration Changing the Network ConfigurationIP Configuration IP ConfigurationIP Connectivity Test IP Connectivity Test Ping10. Http Configuration Http Configuration11. Serial Port Configuration Configuring the Serial PortAssigning Snmp Parameters 12. Snmp Configuration13. Snmp Communities Configuring Community Names14. IP Trap Managers Configuring IP Trap Managers15. Console Login Configuration Console Login ConfigurationDownloading System Software Using Tftp Protocol to Download Over the Network17. Configuration Save & Restore Saving the System Configuration18. Management Configuration Configuring Management Access19. Device Control Menu Configuring the SwitchNot implemented in the current firmware release 20. Port Configuration Configuring Port Parameters21. Port Information Viewing the Current Port Configuration22. Spanning Tree Configuration Configuring Bridge STA Using the Spanning Tree AlgorithmDevice with the lowest MAC address will then 24. Spanning Tree Port Configuration Configuring STA for Ports25. Spanning Tree Information Viewing the Current Spanning Tree Configuration26. Bridge STA Information Displaying the Current Bridge STA27. Spanning Tree Port Information Displaying the Current STA for PortsRules defining port status are 28. Mirror Port Configuration Using a Mirror Port for AnalysisConfiguring Port Trunks 29. Port Trunking Configuration Igmp Multicast Filtering 30. Igmp Configuration Configuring Igmp31. Broadcast Storm Control Configuration Configuring Broadcast Storm Control32. Extended Bridge Configuration Configuring Bridge MIB ExtensionsBy setting this parameter to False 33 .1P Configuration Configuring Traffic Classes34 .1P Port Priority Configuration Port Priority Configuration35 .1P Port Traffic Class Information 802.1P Port Traffic Class Information802.1Q Vlan Base Information Configuring Virtual LANs37 .1Q Vlan Current Table Information 802.1Q Vlan Current Table Information38 .1Q Vlan Static Table Configuration 802.1Q Vlan Static Table Configuration39 .1Q Vlan Static Table Configuration Example 40. Port Assignment Vlan Configuration Port Assignment Vlan Configuration41. Multicast Router Port Information Multicast Router Port Information42. Static Multicast Router Port Configuration Static Multicast Router Port Configuration43. Igmp Member Port Configuration Igmp Member Port Configuration44. Port Security Configuration Port Security Configuration45. Network Monitor Menu Monitoring the Switch46. Port Statistics Displaying Port Statistics47. Rmon Statistics Displaying Rmon StatisticsDrop Events 48. Unicast Address Table Displaying the Unicast Address Table49. IP Multicast Registration Table Displaying the IP Multicast Registration Table50. Static Unicast Addreeess Table Configuration Configuring Static Unicast AddressesLogging Off the System Resetting the System64 VH-8G User Interface Common Tasks Configuring & Monitoring the SwitchSetting Password Protection Assigning an IP Address Checking Network Configuration StatusConnecting via Telnet Viewing Switch Statistics Setting Snmp Management AccessDownloading a Software Upgrade Configuring Port MirroringSuccess Downloading Via the Serial PortDownloading Via Tftp Configuring Spanning Tree Parameters Configuring Class of Service Configuring VLANsConfiguring Port Operation Configuring the Unicast Address Table Configuring BootP Setting a Default GatewayConfiguring Port Trunks VH-8G Snmp Protocol Snmp ManagementRFC 1213 MIB-II MIB ObjectsRFC 1493 Bridge MIB RFC 1573 Interfaces Evolution MIBRFC 1643 Ethernet-Like MIB Enterasys Proprietary MIB Extensions Compiling MIB Extensions Enterasys WebsiteIeee 802.1Q Q-MIB General Spanning Tree FeaturesAppendix A. Spanning Tree Concepts Spanning Tree Protocol in a Network Figure A-1. Spanning Tree Using an VH-8G SwitchSpanning Tree Protocol Parameters Table A-1. Spanning Tree Protocol DefaultsSpanning Tree Protocol Operation 9033640 Spanning Tree Concepts VH-8G VLANs and Frame Tagging Appendix B. Virtual Lans VlansPort Overlapping VH-8G Vlan ConfigurationAssigning Ports to VLANs Vlan ClassificationAutomatic Vlan Registration Forwarding Tagged/Untagged FramesForwarding Traffic with Unknown Vlan Tags Incoming tagged frames contain a priority level range Appendix C. Class of ServiceFigure C-1. Class of Service Example Igmp Snooping and IP Multicast Filtering Appendix D. IP Multicast FilteringVH-8G Index Tftp 9033640 Index Page Page 150183-102 R01