Cisco Systems SLM224G4PS Spanning Tree STP Status, Spanning Tree Global STP, Global Setting

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Chapter 5

Configuration Using the Web-based Utility

Spanning Tree

Spanning Tree Protocol (STP) provides tree topography for any arrangement of bridges. STP also provides one path between end stations on a network, eliminating loops.

Loops occur when alternate routes exist between hosts. Loops in an extended network can cause bridges to forward traffic indefinitely, resulting in increased traffic and reducing network efficiency.

The Switch supports the Classic STP version of STP, which provides a single path between end stations, avoiding and eliminating loops.

Spanning Tree > STP Status

The STP Status screen displays the STP status on the Switch. This information is read-only and cannot be modified.

Spanning Tree > STP Status

Spanning Tree State  Indicates whether STP is enabled on the device.

Spanning Tree Mode  The STP mode by which STP is enabled on the device.

Bridge ID  The Bridge priority and MAC address.

Designated Root  Identifies the bridge priority and MAC address of the root bridge.

Root Port  The port number that offers the lowest cost path from this bridge to the Root Bridge. It is significant when the Bridge is not the Root. The default is 0.

Root Path Cost  The cost of the path from this bridge to the root.

Root Maximum Age (sec)  The device Maximum Age Time, which indicates the amount of time in seconds a bridge waits before sending configuration messages. The default is 20 seconds. The range is 6 to 40 seconds.

Root Hello Time (sec)  The device Hello Time. The Hello Time indicates the amount of time in seconds a root bridge waits between configuration messages. The default is 2 seconds. The range is 1 to 10 seconds.

Root Forward delay (sec)  The device forward delay time. The Forward Delay Time indicates the amount of time in seconds a bridge remains in a listening and learning state before forwarding packets. The default is 15 seconds. The range is 4 to 30 seconds.

Topology Changes Counts  The total amount of STP state changes that have occurred.

LastTopology Change  The elapsed time since the bridge was initialized or reset, and the last topographic change occurred. The time is displayed in a day hour minute second format, for example, 2 days 5 hours 10 minutes and 4 seconds.

Spanning Tree > Global STP

The Global STP screen contains global parameters for STP on the Switch.

Spanning Tree > Global STP

Global Setting

Spanning Tree State  Select Enable or Disable from the drop-down menu to enable or disable STP on the Switch. The default is Enable.

BPDU Handling  Determines how BPDU packets are managed when STP is disabled on the port or Switch. BPDUs are used to transmit spanning tree information. The possible values are:

•Filtering  Filters BPDU packets when spanning tree is disabled on an interface.

•Flooding  Floods BPDU packets when spanning tree is disabled on an interface. This is the default value.

Path Cost Default Values  The method used to assign default path costs to STP ports. The possible values are:

•Short  Specifies a range of 1-65,535 for port path costs.

•Long  Specifies a range of 1-200,000,000 for port path costs. The default path costs assigned to an interface varies according to the selected method. This is the default value.

24/48-Port 10/100 + 4-Port Gigabit Smart Switch with Resilient Clustering Technology and PoE

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Contents Port or 48-Port 10/100 + Icon Descriptions About This GuideAbout This Guide Online ResourcesTable of Contents Snmp Snmp Global Parameters Snmp Views Snmp Group ProfileAppendix B About Switch Stacking Gigabit Ethernet Fiber Optic CablingAppendix C Glossary Appendix D Specifications Appendix G Contact InformationChapter IntroductionProduct Overview Switch LEDs and ports are located on the front panelChapter Product Overview Front PanelPower The Power port is where you connect the AC power Switch’s LEDs and ports are located on the front panelBack Panel Product Overview Pre-Installation Considerations Chapter InstallationInstallation Placement OptionsHardware Installation Desktop PlacementRack-Mount Placement Uplinking the Switch Configuring Stack ModeTo set up a stack with six switches, follow these steps Power off the new unit 5 the former master unit Connect port G1 on Unit 2 to port G2 on UnitConnect port G1 on Unit 3 to port G2 on Unit Chapter Configuration Using Console Interface Using telnetLogin screen appears. Proceed to the Login section below Switch Main Menu How to Use the Console InterfaceLogin System Configuration MenuManagement Settings System InformationUser & Password Settings Security SettingsIP Configuration Http Stack Configuration Restore System Default SettingsReboot System File ManagementPort Configuration Port Status MenuHelp System ModePoE Settings LogoutSetup Summary Chapter Configuration Using Web-based UtilitySetup Device InformationOrange The administrator has closed down this port Setup ZoomSetup Network Settings Clicking on a port displays the Port Configuration screenLocal Time Setup TimeSet Time Daylight SavingPort Management Setup Stack ManagementPort Management Port Settings Sntp ServersPort Management Port Settings Port Configuration LAG Configuration Port Management Link AggregationPort Management PoE Power Settings Port Management LacpVlan Management Create Vlan Vlan Management Port SettingVlan Management Vlan TableVlan Management Port to Vlan Vlan Management Vlan to PortJoin Vlan to Port Statistics Statistics Rmon StatisticsStatistics Rmon History Rmon History Log TableRmon History Table Statistics Rmon Alarms Add AlarmAlarm Table Statistics Rmon Events Statistics Port UtilizationStatistics Interface Statistics Ethernet-like Security 802.1x SettingsSecurity ParametersSetting Timer Security Port SecuritySecurity Management Access List Security Storm ControlQoS Security RadiusBroadcast Only Counts only Broadcast traffic CoS Settings QoS CoS SettingsQoS Queue Settings CoS DefaultQoS Dscp Settings QoS Basic ModeQoS Bandwidth Spanning Tree STP Status Global SettingSpanning Tree Spanning Tree Global STPSpanning Tree STP Port Settings Bridge SettingsSpeed Displays the speed at which the port is operating Multicast Igmp Snooping Vlan Igmp SettingsMulticast Multicast Bridge MulticastMulticast Bridge Multicast Forward All Snmp Global ParametersSnmp Views Snmp Group ProfileSnmp Group Membership Snmp CommunitiesUser Name Provides a user-defined local user list Base Table Snmp Notification FilterSnmp Notification Recipient Advanced TableUser Authentication AdminAdmin User Authentication Local User EditAdmin Static Address Admin Dynamic AddressSecure The entry is defined for locked ports Query Admin Port MirroringAdmin Cable Test Clear Table If selected, this clears the MAC Address tableAdmin Save Configuration Admin Firmware Upgrade Admin RebootAdmin Factory Default Admin Logging Admin Server LogsAdmin Memory Logs Admin Flash Logs LogoutGigabit Ethernet Appendix aAppendix a About Gigabit Ethernet Fiber Optic Cabling Fiber Optic CablingAppendix B Appendix B About Switch StackingAbout Switch Stacking Stack Building Quick StartUnit IDs Advanced StackingStack Resiliency Unit ID AllocationStack Units Startup Process Master DiscoveryMaster Election Stacking Examples Unit and Port ConfigurationUser Controls Replacing a Failed Stack Member in a Running StackStack Master Failure and Replacement Subgroup Contains Both Master Unit and Backup Master Unit Splitting a StackMerging Two Stacks Both Stacks Kept Running During InsertionStacking Cable Failure Inserting Too Many UnitsAppendix C Appendix C GlossaryGlossary Glossary Packet a unit of data sent over a network Mail protocol on the InternetAppendix C Appendix D Specifications SpecificationsAppendix D Dimensions Class of Service Port-based 802.1p Vlan priority-basedPower in compliance with Ieee Management VlanAppendix E Warranty InformationObtaining Warranty Service Exclusions and LimitationsWarranty Information Technical SupportAppendix F Regulatory InformationRegulatory Information Appendix F Norsk Norwegian Miljøinformasjon for kunder i EU Appendix F Appendix G Contact Information
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