Cisco Systems DGS-1224T manual Configuration 802.1D Spanning Tree, Configuration Spanning Tree

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Configuration > 802.1D Spanning Tree

802.1D Spanning Tree Protocol (STP) implementation is designed to prevent network loops that could cause a broadcast storm. When physical links forming a loop provide redundancy, only a single path will be forwarding frames. If the link fails, STP activates a redundant link automatically.

Figure 37 – Configuration > Spanning Tree

By default, Spanning Tree is Disabled. If Enabled, the Switch will listen for BPDU packets and its accompanying Hello packet. BPDU packets are sent even if a BPDU packet was not received. Therefore, each link between bridges is sensitive to the status of the link. Ultimately this difference results in faster detection of failed links, and thus faster topology adjustment. A draw-back of 802.1D is this absence of immediate feedback from adjacent bridges.

After Enabling STP, setting the STP Global Setting includes the following options:

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Contents LinkDGS-1224T Building Networks for PeopleTable of Contents Page Page Purpose Terms/UsageGigabit Ethernet Technology IntroductionFast Ethernet Technology Switching Technology Ieee 802.1Q VlanFeatures IEEE802.1Q VlanTechnical Specifications Flash Memory Ieee 802.3 complianceTemperature Storage Temperature Power consumptionEmission EMI and Safety Certifications Physical & EnvironmentInstallation UnpackingRack Mounting Attach the adhesive rubber pads to the bottomConnecting Network Cable Attach the mounting brackets to the SwitchAC Power LED Indicator Front PanelRear panel of the Switch Rear PanelPower and System LEDs Understanding LED IndicatorsBlinking Installing the SmartConsole Utility Supported web browsersSmartConsole Utility Features Menu ToolbarPage Definitions of the Discovery List features Discovery ListMonitor List Definitions of the Monitor List functions and terms View trapDevice Setting Trap informationThis space has been intentionally reserved for notes Firmware Upgrade Login Web-based UtilityLog in screen Tool Menu Tool MenuTool Menu Configure Backup and Restore Setup Menu Tool Menu System RebootSystem System Setting System Trap SettingSystem Trap Setting System Port Setting System Port SettingSystem Snmp Setting System Snmp Setting System Password Access Control System Password Access ControlConfiguration Jumbo Frame Configuration 802.1Q VlanConfiguration 802.1Q Vlan Default Setting Configuration 802.1Q Vlan Example VIDs Configuration Trunking Configuration Igmp SnoopingConfiguration Igmp Snooping Configuration Page Configuration Igmp Router port Settings Configuration Igmp Multicast Entry Table Configuration 802.1D Spanning Tree Configuration Spanning TreePage Configuration Port Mirroring Configuration Port MirroringQoS 802.1p Default Priority Security Safeguard EngineSecurity Safeguard Engine Security Broadcast Storm ControlSecurity 802.1X Setting Security Broadcast Storm ControlQoS 802.1X Setting Page Security Mac Address Table Static MAC Security Static Mac AddressSecurity Mac Address Table Dynamic Forwarding Table Security Dynamic Forwarding TableMonitoring Statistics Monitoring StatisticsMonitoring Port Statistics