Linksys SLM224P, SLM248P Spanning Tree STP Status, Spanning Tree Global STP, Global Setting

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Chapter 4

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  The ID of the bridge with the lowest path cost to the instance ID.

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. This is the default value.

•Flooding  Floods BPDU packets when spanning tree is disabled on an interface.

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. This is the default value.

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Contents Business Series Smart Gigabit Ethernet Switch About This Guide About This GuideIcon Descriptions Online ResourcesTable of Contents Table of Contents Appendix E Contact Information Appendix B Glossary Appendix C SpecificationsAppendix D Warranty and Regulatory Information Chapter Introduction IntroductionChapter Product Overview Product OverviewSLM2048 Back PanelSLM2024 SLM248G SLM248P SLM224G SLM224P Chapter Installation InstallationPre-Installation Considerations Placement OptionsRack-Mount Placement Hardware InstallationDesktop Placement Uplinking the Switch WithSetup Summary Chapter Configuration Using Web-based UtilitySetup Setup Network Settings Device InformationSystem Information IdentificationSetup Time IP ConfigurationLocal Time Daylight SavingPort Management Port Management Port SettingsPort Configuration Port Management Link Aggregation LAG Configuration Port Management PoE Power Settings Port Management LacpGlobal Parameter Port PriorityVlan Management Port Settings Vlan ManagementVlan Management Create Vlan Vlan Management Port to VlanJoin Vlan to Port Port The number of the port being configuredVlan Management Vlan to Port Statistics Statistics Interface StatisticsInterface Ethernet-likeSecurity 802.1x Settings Setting TimerSecurity ParametersSecurity Port Security Security IP Access List Security Storm ControlIP Address Enter the IP address to be allowed Broadcast Only Counts only Broadcast trafficSecurity Radius QoS CoS Settings CoS SettingsCoS Default QoSQoS Basic Mode QoS Queue SettingsQoS Dscp Settings Global Setting Spanning TreeSpanning Tree STP Status Spanning Tree Global STPSpeed Displays the speed at which the port is operating Spanning Tree STP Port SettingsBridge Settings Vlan Igmp Settings MulticastMulticast Igmp Snooping Multicast Bridge MulticastMulticast Bridge Multicast Forward All Admin Admin User AuthenticationUser Authentication Local User EditAdmin Static Address Admin Dynamic AddressQuery Secure The entry is defined for locked portsAdmin Port Mirroring Admin Save ConfigurationAdmin Firmware Upgrade Admin RebootAdmin Factory Default Click the Reboot button, then click OK to confirmAdmin Flash Logs Admin LoggingAdmin Memory Logs Logout If you select Yes, a confirmation screen appearsFiber Optic Cabling Appendix a About Gigabit Ethernet Fiber Optic CablingGigabit Ethernet Appendix B Glossary GlossaryGlossary Packet a unit of data sent over a network Mail protocol on the InternetAppendix B SLM2024/SLM2048 Appendix C SpecificationsSpecifications Power Internal Power Certification Connectors for 10BASE-TButtons Reset Cabling Type UTP CAT 5 or better for UL, cUL, CE mark, CBUnit Weight 39 lb 2.9 kg83 lb 3.1 kg 28 lb 3.3 kgAppendix D Warranty and Regulatory Information Limited WarrantySafety Notices FCC StatementIndustry Canada Statement Règlement d’Industry CanadaDansk Danish Miljøinformation for kunder i EU Appendix D Norsk Norwegian Miljøinformasjon for kunder i EU Appendix D Appendix E Contact Information
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