D-Link DES-5024 manual Spanning Tree Configuration, STA Operation Levels

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Fast Ethernet Switching System User’s Guide

Spanning Tree Configuration

The Spanning Tree Configuration panel is used to configure the Spanning Tree Algorithm. The Spanning Tree Algorithm (STA) in the DES-5024 allows you to create alternative paths (using multiple switches or bridges) in your network. These backup paths are idle until the DES-5024 determines that a problem has developed in the primary path. If the primary path breaks down STA will activate the backup path. STA is very complicated and you should understand it well before changing the default settings. See Table 7: User Selective STA Parameters.

STA Operation Levels

STA operates on the bridge level and the port level. On the bridge level, STA calculates the Bridge Identifier for each DES-5024, then sets the Root Bridge and the Designated Bridges. On the port level, STA sets the Root Port and Designated Ports.

Spanning Tree Configuration Menu

The Spanning Tree Configuration menu, displayed in Figure 34, allows you to enable or disable STA, set bridge priority and other configurations.

Figure 34: Spanning Tree Configuration

Managing the DES-5024

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Contents DES-5024 Fast Ethernet Switching System User’s Guide Link Limited Warranty Hardware North, Central, and South America Copyright Statement Wichtige Sicherheitshinweise Table of Contents Page Page Audience About This GuideOrganization Introduction FeaturesPage DES-5024 Front Panel Front PanelDES-5024 Rear Panel Rear PanelTelnet Management Management MethodsUpdating Firmware Local Console ManagementUnpacking the DES-5024 Installing the DES-5024Installation Options Install Feet on Bottom Desktop/ Shelf InstallationAttach Feet Rack Installation Attach Mounting Brackets Insert into Rack Installing Modules Remove Blank Bracket Insert Optional Module Power On Cable Specifications Connecting the DES-5024 to the NetworkCopper Cable Cable Diagram Fiber Optic Cable RS-232 Port PortsMDI-X Ports Fiber Optic PortsDES-5024 to DES-5024 Connection Connecting the DES-5024 to other Switches and HubsDES-5024 LEDs LEDsCPU Module PowerLED Link Port 10/100-TX ModuleCol Port 100BASE-FX ModuleLit Dark Act Port 1000BASE-SX ModuleManaging the DES-5024 ∙ Data bits ∙ Parity None ∙ Stop bits ∙ Flow Control None Local Console ManagementTelnet Log ∙ Default User Name D-Link ∙ Default Password D-LinkHelp Message Help MessageSpacebar Panel ConventionsConsole Program System ConfigurationUser Account Management Vlan Port Management 100BASE-FX/ 1000BASE-SX Switch Port ModuleSpanning Tree Configuration Snmp Management ConfigurationSystem Information System Configuration MenuSystem Reset Factory Reset to Default Config ValuesHardware Revision Software UpdateBoot Prom Firmware Version System Information MenuSystem Name LAN Default GatewayMAC Address System DescriptionSystem Reset System ResetFactory Reset Factory ResetFactory Reset confirmation Advantages of Store and Forward System Rate ControlDisadvantages of Store and Forward Disadvantages of Cut-Through Advantages of Cut-ThroughSoftware Update menu Software Update MenuTransfer Firmware Xmodem User Account Change Menu User Account ManagementCreate New User PasswordConfirm Password Access LevelPage Status Delete UsersDelete Page Old Password Change PasswordNew Password Page Switch Port Configuration State Switch Port Configuration MenuPhysical Priority Port StateFlow Control Spanning Tree Configuration Menu Spanning Tree ConfigurationSTA Operation Levels Root Cost Forward Delay TimeSpanning Tree Algorithm Bridge PriorityRoot Port Root BridgeSnmp Management Configuration Snmp Community String Snmp Management Configuration MenuSnmp Manager Setting Access RightLink Change Event Snmp Trap Manager SettingAuthentication Failure Cold StartPage Vlan Port Management Vlan Port Management menu Vlan Port Management MenuTrunkGroup Create New VlanNew Vlan Name Port #Page Vlan Name Delete Vlan MenuVirtual LAN Name Modify Vlan MenuTrunking Port Management menu Trunking Port Management MenuNew Trunking Group Name Create New Trunking PortName Page Trunking Port Delete Trunking PortModify Trunking Port Modify Trunking Port Trunking Port NameProblemSolution TroubleshootingPage Diagnostic LED Switch Specifications Appendix a DES-5024 Technical SpecificationsPort Specifications 10BASE-T EMI Fast Ethernet Switching System User’s Guide Performance Index Access LevelUser Name 50, 52