Cabletron Systems CSX200, CSX400 manual Root Bridge, Root Cost, Root Port

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Bridging

Part of a bridgeÕs IdentiÞer is based on its MAC address. In most network installations,

TIP performance differences between bridges may be negligible. You may, however, Þnd your data bottle-necked in installations where both a low-performance bridge and a high-performance bridge are attached to the same LAN segment and the two (or more) bridges have the same Priority component set (e.g., at the default 8000 Hex). In such a scenario you may want to alter the Priority component of the higher performance bridge to ensure that it becomes root for the segment (or overall root). Remember, if Priority components are equal, the bridge on the segment with the lowest MAC address would have a better chance of being selected as the root bridgeÑas it would have a lower Bridge IdentiÞer. If your bridges come from multiple vendors, they will have different MAC address values (e.g., Cabletron devices have a lower MAC address than 3Com devices); if they come from the same vendor, the bridge with the earlier manufacture date will have the lower MAC address value.

Root Bridge

Displays the MAC address of the bridge that is currently functioning as 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 ÒcostÓ 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. (You can edit the Path Cost of bridge ports as described later.) The Root BridgeÕs Root Cost is 0.

Root Port

This Þeld displays the identiÞer (the physical index number) of the device bridge port that has the lowest cost path to the Root Bridge on the network. If the device is currently the Root Bridge, this Þeld will read 0.

Protocol

Displays the Spanning Tree Algorithm Protocol type the device is currently using. The choices are:

¥802.1

¥DEC (DEC Lanbridge 100)

¥None

The following four Þelds display values used for various Spanning Tree timers that are set at the Root Bridge and this bridge. In Spanning Tree operations, the value used for the tree is the one set at the Root Bridge (with the exception of Hold Time, which is a Þxed value); but you can change the value for each bridge on your network in the event that it becomes Root.

Bridge Spanning Tree

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Contents CSX200 and CSX400 User’s Guide Page Virus Disclaimer Page Restricted Rights Notice Page Contents Chapter Bridging Vii Token Ring Physical Status Fields IndexIntroduction HSIM-W6 and HSIM-W84 Using the CSX 200 and CSX400 User’s GuideRelated Manuals Device Name Software ConventionsCommon Window Fields MAC Address Using the MouseIP Address LocationUsing Window Buttons Getting Help from the Cabletron Systems Global Call Center Using On-line HelpGetting Help CSX200 and CSX400 Firmware CSX200 and 400 Chassis View CSX200 and CSX400 Chassis View Windows Viewing Chassis InformationFront Panel Information Date Menu StructureTime Port Status Menu Device MenuPort Menus Utilities MenuHelp Menu Status CSX200/400 Port Status DisplaysSelecting a Port Status View Load Port Status Color Codes Chassis Manager WindowDevice Type Viewing Hardware TypesViewing the Port Description Managing the DeviceViewing I/F Summary Information Using the Find Source Address FeatureDescription IndexRaw Counts Physical StatusLogical Status Interface Performance Statistics/Bar GraphsRate Detail Interface Statistics Viewing Interface DetailNon-Unicast ErrorAddress UnicastMaking Sense of Detail Statistics Enabling and Disabling PortsPackets Transmitted Transmit only CSX200 and 400 Chassis View CSX200 and 400 Chassis View Managing the Device About the CSX200 Series CSX200 and CSX400 WAN ConfigurationWAN Redundancy About the CSX400WPIM-DDS CSX WPIMsEIA-RS449 WAN Logical View Window WAN Logical ViewWAN Logical View Window Fields Changing WAN Logical SettingsCSX200 and CSX400 WAN Configuration CSX200 and CSX400 WAN Configuration WAN Logical View Bridging Basics BridgingAbout Source Route Bridging About Transparent BridgingBridging About Source Route-Translational Bridges About Source Route-Transparent BridgesBridging Viewing and Managing Bridging Interfaces Bridging Bridge Status Window Information Fields Bridge Status WindowBridge State on Interface Up TimeBridge Address Accessing Other Options from the Bridge Status WindowInterface Type Bridging Bridging Bridging From the Bridge Status window Enabling and Disabling BridgingEnabling and Disabling Individual Interfaces From the Chassis View window Enabling and Disabling All Installed InterfacesBridge Statistics Performance GraphsFrom the Bridge Status window Filtered Magenta Bridge Performance Graph Window FieldsFrames Forwarded Green Bridge Detail Breakdown Window Errors RedXmitted Blue Configuring the Bridge Performance GraphsFiltered Frames ForwardedForwarded from XmittedBridge Port Detail Breakdown Window Forwarded toI/F Statistics Window Interface Statistics WindowStatistics Window Fields Transmit Queue Size Csmacd Statistics WindowUnknown Protocol Packets ReceivedAlignment Receive ErrorsTransmission Errors PPP Link Statistics Window Collision ErrorsPackets Too Long ErrorsBad Addresses Bad ControlsStatistics Dot5 Errors Statistics Window Burst Errors Line ErrorsSoft Errors Internal ErrorsCongestion Errors Token ErrorsSource Route Statistics All Paths Expl Bridge Source Routing Window FieldsReceived Frames Specif. RoutedDiscards Transmitted FramesHop Cnt. Exceeded Bridge Spanning TreeBridge Priority Configuring the Bridge Spanning Tree WindowBridge Level Fields Root Port Root BridgeRoot Cost Bridge Port Level Fields Designated Bridge Path CostDesignated Cost Designated RootChanging the Spanning Tree Algorithm Protocol Type Changing Bridge Spanning Tree ParametersChanging Bridge Priority Changing Max Age Time Changing Forwarding Delay TimeChanging Hello Time Changing Path Cost Filtering DatabaseChanging Port Priority Bridging From the Bridge Status window Capacity Filtering Database Window FieldsList NumberReceive Port Configuring the Filtering DatabaseAging Time Source PortChanging the Type of Entry Altering the Aging TimeAdding or Deleting Individual Entries Changing the Receive PortChanging the Port Filtering Action Clearing All Permanent, Static, or Dynamic Entries Ethernet and Token Ring Special Filter DatabasesEthernet Special Filter Database Window 13. Ethernet Special Filter Database Window Token Ring Special Filter Database WindowDestination Address EnableSpecial Filter Database Window Fields FileDefining and Editing Filters in the Special Database This Changing the Port Filtering Action Setting the Port Filtering ActionChanging the Receive Ports Clearing the Port Filtering Action Enabling and Disabling a FilterSaving a Set of Filters to a File Source Route Configuration 16. Source Route ConÞguration Window Information on Source RoutingSource Route Configuration Fields Source Route Configuration WindowHop Count Limit Subnet MaskLocal Segment Target SegmentBridge Number Spanning Tree ExplSpanning Tree Mode Making and Setting Changes Using the Find Source Address FeaturePort Source Addresses Window Setting the Aging Time Duplex Modes Interface Duplex Modes WindowDuplex Modes Window Fields Full Duplex Setting the Duplex ModeEthernet Port Configuration Window Standard ModeFast Ethernet Port Configuration Link State Current Operational ModePort Type Remote Capabilities Desired Operational ModeAdvertised Abilities Setting the Desired Operational Mode for the FE-100FX Setting the Desired Operational Mode for the FE-100TXSONET/SDH Configuration Sonet Port ConfigurationSonet SONET/SDH Statistics Window Bridging 24. The SONET/SDH Statistics Window Loss of Pointer Loss of SignalLoss of Frame Errored SecondsCode Violations Severely Errored SecondsSeverely Errored Framing Seconds Configuring Broadcast Suppression Token Ring Bridge Mode Source Routing Setting The Token Ring Bridge ModeDefining the Bridge Modes TransparentActive Port Using the Physical View WindowsEtwmim Ethernet Port Physical View Ethernet Port Physical Status FieldsEpim Type Etwmim Token Ring Port Physical ViewRing State Token Ring Physical Status FieldsRing Speed Active Monitor FNB StateUsing the Interface Configuration Window 29. Interface ConÞguration Window Defining the Bridge MethodOther Setting the Bridge MethodNetBIOS Defining the Protocol TransmissionUsing the Bridge and Port Configuration Windows From the Bridge Status window Ring Number Virtual Ring NumberBridge Mode/Explorer Type Port ModeNovell Translation Configuring SmartTrunking Name Port# SmartTrunks ModeSmartTrunk State InstanceBridging Bridging 100 Configuring SmartTrunking Index Index-2 Index-3 Index-4
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CSX200, CSX400 specifications

Cabletron Systems was a leading developer of networking solutions, and its CSX400 and CSX200 series of high-performance switches represent some of the key innovations in the field of enterprise networking during their time. Both models were geared towards enhancing network reliability, efficiency, and speed, particularly in environments where heavy data traffic and complex networking demands were prevalent.

The CSX400, designed for larger enterprises, boasts a robust architecture capable of handling significant throughput. One of its standout features is its stackable design, allowing multiple switches to be interconnected and managed seamlessly as a single unit. This scalability provides organizations with the flexibility to expand their networks without significant infrastructure overhauls. The CSX400 supports various Ethernet standards, including 10/100 Ethernet and Gigabit Ethernet, positioning it to effectively manage both legacy and modern networking requirements.

In addition to its scalability, the CSX400 is distinguished by its advanced Layer 2 and Layer 3 routing capabilities. This dual-layer functionality enables efficient data handling and is instrumental in managing traffic between different network segments. Moreover, the switch incorporates features like VLAN (Virtual Local Area Network) support and Quality of Service (QoS) prioritization, allowing for enhanced performance of critical applications and streamlined bandwidth allocation.

On the other hand, the CSX200 series is tailored for smaller enterprises or branch offices needing a reliable yet efficient networking solution. Despite its compact design, the CSX200 is equipped with essential features that promote effective network management and security. It offers a simplified management interface, making it user-friendly for network administrators. The switch also provides essential access control measures, employing technologies like IEEE 802.1X for network access security.

Both the CSX400 and CSX200 prioritize performance through the incorporation of advanced switching technologies. They support features such as Spanning Tree Protocol (STP), enabling loop-free topologies and enhanced network resilience. These attributes are particularly crucial in dynamic networking environments where downtime can have significant repercussions on business operations.

Overall, Cabletron Systems' CSX400 and CSX200 series represent a blend of scalability, advanced routing capabilities, and user-friendly management, making them vital assets for organizations looking to optimize their network infrastructure during a period of rapid technological evolution. With their rich feature sets and unwavering performance, these switches helped pave the way for modern networking solutions that cater to diverse enterprise needs.
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