Cabletron Systems TSX-1620 manual Max Age, Hello Time, Priority, Root Port, Root Cost, Hold Time

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Using the TSX-1620 Bridge View

Max Age

The current setting for the bridge’s BPDU ageing timer, in seconds. The ageing timer defines the maximum number of seconds that a Configuration BPDU is retained by the bridge before it is discarded. During normal operation, each bridge in the network receives a new Configuration BPDU before the ageing timer expires. If the timer expires before a new Configuration BPDU is received, it indicates that the former Root is no longer active. The remaining bridges begin Spanning Tree operation to select a new Root. The Root Bridge determines the Max Age. The range for this field is from 6 to 40 seconds, with a default value of 20 seconds.

Hello Time

Indicates, in seconds, the length of time the Root Bridge, or bridge attempting to become the Root, waits before resending a Configuration BPDU. The Root Bridge determines the Hello Time.

Priority

The Spanning Tree Algorithm assigns each bridge a unique identifier, which is derived from the individual port’s MAC address and its priority as determined by the Spanning Tree Algorithm or your setting. The bridge with the lowest value of bridge identifier is selected as the Root. A lower priority number indicates a higher priority; a higher priority enhances a bridge’s chance of being selected as the Root.

Acceptable values range from 0-FFFF and can be edited to change the network topology, if needed. The default is 8000.

Root Port

The port identifier (i.e., the physical index number) for the port that provides the lowest cost path to the Root Bridge. The Root Port field displays 0 if this bridging device is the Root Bridge.

Root Cost

Indicates the cost of the data path from this bridge to the Root Bridge. Each port on each bridge adds a “cost” to a particular path that a frame must travel. For example, if each port in a particular path has a Path Cost of 1, the Root Cost would be a count of the number of bridges along the path. This field will read 0 if the TSX-1620 is the Root Bridge. See Changing a Port’s STA Parameters,

page 3-29, to find out how to set a port’s Path Cost.

Hold Time

The minimum time, in seconds, that can elapse between the transmission of Configuration BPDUs. The Hold Time ensures that Configuration BPDUs are not transmitted too frequently through any bridge port. Receipt of a Configuration BPDU starts the Hold Time count at a device. If the Hold Time expires, the port invokes the Transmit Configuration BPDU procedure, which sends configuration change information to the Root. The Hold Time is a fixed value, as specified by the IEEE 802.1d specification.

The Spanning Tree Protocol Window

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Contents Portable Management Application For TSX-1620 User’s Guide Page Virus Disclaimer Applicable to licenses to the United States Government only Restricted Rights NoticeContents Contents Chapter Using the TSX-1620 Bridge ViewIntroduction to Spma for the TSX-1620 Using the TSX-1620 User’s GuideIntroduction to Spma for the TSX-1620 What’s not in the TSX-1620 User’s GuideScreen Displays ConventionsIntroduction to Spma for the TSX-1620 Button Using the MouseFTP Getting HelpTSX-1620 Firmware Introduction to Spma for the TSX-1620 TSX-1620 Firmware Using the Hub View Using the TSX-1620 Hub ViewNavigating Through the Hub View Using the TSX-1620 Hub ViewTSX-1620 Hub View Hub View Front PanelDevice Name UptimeDevice Location IP AddressPort Status Using the Mouse in the TSX-1620 Hub ViewTSX-1620 Application Displays Interface Application Display Menu Structure Interface Application DisplayBridge Application Display Port Display Form Monitoring Device PerformanceInterface Port Display Form Options Oper StatusSpeed TypeInterface Number StatisticsUsing the TSX-1620 Hub View Port Color Codes for the Interface Application Display Bridge Port Display Form Options AdminTp Frames Forwarded Tp Frames Filtered Clearing Statistical InformationSr Frames Forwarded Bridge Port NumberManaging the Device Setting the Polling IntervalsDevice General Status Contact StatusDevice Configuration Port Operational StateUsing the Bridge Config Utility Defining Community Names Configuring Your TSX-1620’s Serial Port Using the TSX-1620 Hub View 11. The if Configuration Window Performing if ConfigurationPerforming Interface Configuration Changing the Displayed InterfaceViewing NetBios Information Name Viewing and Changing System InformationAddress PortConfiguring Port Security Setting the Device Date, Time, and Daylight Savings ModeViewing Your Port Security Settings Using the TSX-1620 Hub View Configuring Your Port Security Settings 17. The Interface List Window Viewing the Interface ListAccessing Bridge Management Accessing the MIB I, II ToolPerforming Source Routing Configuration for a Port Viewing a Bridge Port’s Source Address List Enabling and Disabling Bridge Ports Enabling/Disabling Bridging for TSX-1620 PortsUsing the TSX-1620 Hub View Using the TSX-1620 Hub View Managing the Device Bridging Basics Using the TSX-1620 Bridge ViewSource Route Bridging Transparent BridgingSource Route Transparent Bridges Accessing the Bridge Traffic View WindowNavigating Through the Bridge Traffic View Click on in the Bridge Traffic View front panel Time and Date Bridge Traffic View Front PanelMAC Address Bridge Port Display MAC Port #Enabled Blocking Detail View Showing Two Ports Using the Detail View WindowBridge Status Window Bridge Statistics Window Bridging Type DelayExceedDiscardTotal Ports IfIndexMtuExceedDiscard Filtering Database WindowViewing the Filtering Database Learned Entry Discards Ageing Time secsSource Address StatusDestination Port Receive PortChanging the Filtering Database Dynamic Ageing Time Changing the Filtering Database Ageing Time Changing Forwarding and Static Database EntriesForward To Ports Static AddressFinding a Filtering Database MAC Address Spanning Tree Protocol WindowDeleting a Static Table Entry 11. Spanning Tree Protocol Window Spanning Tree Version Forward DelayDesignated Root Num. Topology ChgsHello Time Max AgePriority Root PortRoot Max Age Root Forward DelayRoot Hello Time Changing Spanning Tree Parameters Spanning Tree Port Parameters WindowPriority Port Designated Cost Path CostChanging a Port’s STA Parameters Source Routing Configuration WindowDesignated Bridge Designated PortHop Count InterfaceBridge Number Local Segment NumberTarget Segment Number Largest FrameChanging Source Routing Port Parameters STE Span Mode14. Pie Chart Window Creating Bridge Traffic Charts, Graphs and MetersConfiguring Forwarding Thresholds 15. Port Forwarding Thresholds Window Using the TSX-1620 Bridge View Viewing the Forwarding Log To clear all logs or just the current log 17. The Polling Intervals Window Changing Polling IntervalsEnabling and Disabling a Transparent Bridge Port Enabling and Disabling PortsDevice Info Bridge Port Display InfoEnabling and Disabling a Source Routing Bridge Port 18. Port Enable/Disable Source Routing WindowUsing the TSX-1620 Bridge View Index Index-2 Index-3 Index-4 Index-5 Index Index-6

TSX-1620 specifications

The Cabletron Systems TSX-1620 is a pioneering piece of network hardware that played a significant role in the evolution of networking technologies during the 1990s. This well-engineered device is primarily recognized as a multi-port Ethernet switch that was designed to provide high-speed, reliable connectivity for local area networks (LANs). As organizations increasingly demanded robust performance and enhanced network capabilities, the TSX-1620 emerged as a powerful solution to address these needs.

One of the key features of the TSX-1620 is its support for both 10Base-T and 100Base-T standards, catering to both standard Ethernet and Fast Ethernet connections. This versatility allowed businesses to easily transition from older Ethernet systems to newer, faster specifications without replacing their entire infrastructure. The switch could intelligently manage traffic between devices, minimizing collisions and ensuring that data packets were transmitted efficiently.

The architecture of the TSX-1620 includes support for various advanced technologies that enhance network performance. Its store-and-forward switching capability improves data integrity by checking packets for errors before forwarding them to their destination. This process reduces the risk of corrupted data affecting network performance, making it especially valuable for mission-critical applications.

Another notable feature is its robust security tools. The TSX-1620 incorporates VLAN (Virtual Local Area Network) support, enabling network administrators to segment traffic and improve security across different departments or user groups. This not only mitigates the risk associated with unauthorized access but also optimizes network traffic by confining broadcasts to designated VLANs.

Scalability is a prominent characteristic of the TSX-1620. With ports available for expansion, organizations could easily increase their network capacity as their needs grew. This feature promoted long-term investment in network infrastructure, allowing businesses to adapt quickly to changing demands without incurring substantial costs.

Reliability is paramount in networking equipment, and the TSX-1620 does not disappoint. Engineered with high-quality components, this switch was built to operate efficiently in a variety of environments while maintaining stable performance. Its design ensures a cooling mechanism that minimizes overheating, thereby prolonging its operational lifespan.

In summary, the Cabletron Systems TSX-1620 represents a significant advancement in network switch technology during its era. Its combination of speed, versatility, security features, and robust architecture made it a valuable asset for organizations seeking to enhance their networking capabilities and prepare for the future.
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