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