Enterasys Networks VH-2402S manual Spanning Tree Protocol Parameters

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Spanning Tree Protocol Parameters

Several configuration parameters control the operation of the Spanning Tree Protocol. Table A-1 describes the parameters and lists the VH-2402S switch default settings for each parameter.

You can cause serious network performance degradation if you do not fully understand Spanning Tree concepts. Be sure to consult personnel experienced with this process prior to configuring Spanning Tree parameters.

Table A-1. Spanning Tree Protocol Defaults

Parameter

Description

 

 

Default Value

 

 

 

Bridge Group

Unique MAC group address, recognized by all bridg-

 

Address

es in the network.

 

 

Bridge Identi-

Identifier for each bridge. This parameter consists of

32768 (bridge

fier

two parts: a 16-bit bridge priority and a 48-bit network

priority)

 

adapter address. Ports are numbered in absolute

 

 

numbers starting from 1 regardless of their bridge at-

 

 

tachment. The network adapter address is the same

 

 

address as the first port of the bridge.

 

Port Identifier

Port Identifier Identifies each port of each bridge, with

 

 

an incremental default value given for each port.

 

 

Port 1 -32768

Port 9 -32776

Port 17 -32784

 

 

Port 2 -32769

Port 10 -32777

Port 18 -32785

 

 

Port 3 -32770

Port 11 -32778

Port 19 -32786

 

 

Port 4 -32771

Port 12 -32779

Port 20 -32787

 

 

Port 5 -32772

Port 13 -32780

Port 21 -32788

 

 

Port 6 -32773

Port 14 -32781

Port 22 -32789

 

 

Port 7 -32774

Port 15 -32782

Port 23 -32790

 

 

Port 8 -32775

Port 16 -32783

Port 24 -32791

 

Port Priority

Indicates the priority of a specific port in relation to

128

 

other ports.

 

 

 

Cost Compo-

The Spanning Tree Protocol calculates and ensures

19

nent of Each

that an active topology generates minimal cost paths.

 

Port

A value of 100 is generally used for 10Mbps Ethernet

 

 

networks, a value of 19 for 100Mbps Fast Ethernet,

 

 

and a value of 4 for 1000Mbps Gigabit Ethernet.

 

For detailed information on the operation of the Spanning Tree Protocol, consult Section 4 of IEEE Standard 802.1D, ISO/IEC 10038:1993.

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Contents Management Guide Fast Ethernet SwitchPage 9033645-01 9033645-01 Table of Contents Appendix A. Spanning Tree Concepts Snmp ManagementIndex Vi Table of Contents VH-2402S Console Port Out-of-Band Connections Configuration OptionsManagement Overview Required ConnectionsIn-Band Connections Configure the Switch SiteConfigure the Remote Site Remote Management via the Console PortIn-Band Network Connection Management Overview VH-2402S Overview VH-2402S 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 InformationSwitch Information Displaying Switch Version and Module InformationManagement 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 NetworkParameter Description 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 Ports or Modules25. 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 Ports or ModulesRules 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 System66 VH-2402S 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 MirroringDownloading Via Tftp Downloading Via the Serial Port9033645-01 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 Configuring & Monitoring the Switch VH-2402S Snmp Protocol Snmp ManagementMIB Objects RFC 1493 Bridge MIB RFC 1213 MIB-IIRFC 1573 Interfaces Evolution MIB RFC 1643 Ethernet-Like MIBEnterasys 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 VH-2402S SwitchesSpanning Tree Protocol Parameters Table A-1. Spanning Tree Protocol DefaultsSpanning Tree Protocol Operation 9033645-01 Spanning Tree Concepts VH-2402S VLANs and Frame Tagging Appendix B. Virtual Lans VlansPort Overlapping VH-2402S 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 FilteringPage Index Tftp Page 150524-103 R02