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EXP Computer S200 manual Bridging

Models: S200

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Configuring the PathBuilder S200 Series Switch for Bridging Operation

•LAN Side: The LAN port connection consists of one link. To configure the bridge module requires that you configure the LAN Port; the LAN Bridge; and the LAN Bridge Link, which passes the LAN traffic from the LAN Port to the LAN Bridge (always numbered “1”).

•WAN Side: The WAN Adapter (default subaddress 94) is used to make the transition from the LAN to the WAN. The WAN links are numbered 5 to 36 and provide up to 32 WAN connection links which correspond to potential bridges. These links pass the LAN traffic from the LAN Bridge to the WAN Adapter. Refer to the sections on Bridge software modules and links for more information.

•WAN Adapter: The WAN Adapter adapts LAN traffic to WAN protocols. It also provides other WAN services for the bridge, such as establishing network calls via a set of configurable records.

Bridging

T0008-16F

Release 5.2M

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Image 45

Contents

3Com Corporation Restricted Rights Legend Restricted Rights Notification for U.S. Government UsersProprietary Material Page Overview SolutionsFunctionality Multiple LANsBridging TranslationalNo Local Bridging TransparentThis Manual Topic This Notice Topic Switches Bridging Features and CapabilitiesIntroduction Bridging PrimerEthernet LAN Ethernet Bridge ExampleOperation WAN application, but you can also bridge across an X.25 WANMixed LAN Bridging MAC Addressing LLC2 Local LLC2 Local TerminationTermination LT ExampleAutolearn for Local Termination Filtering NetBIOS NameMac Address FilteringSpanning Tree Protocol What Is It? Automatic Manual Spanning Tree SupportDual Ethernet LANs Basic Remote Bridging Examples Across a WANWAN or Permanent Virtual Circuit PVC for Frame Relay Example of Bridges in an SVC Arrangement Connections BridgeLAN Interface SupportBridging Interface Connections Between WAN and LAN Setting Up WAN Operation for BridgingSetting Up WAN Operation for Bridging Configure Parameters Bridge ParametersThese parameters make up the Bridge Parameter Record Maximum Number of Bridge LinksStpe Control Bad Hello TimeoutAUTO, MAN MANLearn Only Period used for Ethernet only Aging Period used for Ethernet onlyBridge WAN Data Priority used for Ethernet only Bridged Protocols Bridge Link Parameters Parameters control the characteristics of this connectionBridge links as links to the networks attached to it Bridge LinkEntry Number These parameters make up the Bridge Link RecordBridgeType SR, TB, BothsrandtbLargest Frame Size Hop Count LimitMAC Address Filter Action NONE, PASS, BlockNetbios Name Filter Action Protocol Filter ActionStpe Link State NORMAL,RFC1294, Trans Link ModeNormal Virtual Ring NumberOver the WAN LAN Connection TableLAN Connection Table ParametersROUT, BRID, Brout LAN Forwarder TypeRout LAN Connection TypeCodex Encapsulation TypeAutocall Mnemonic Lcon Queue LimitOFF, on Billing RecordsOFF Traffic PriorityLimiting Bridge Frame Sizes Where bridging is done remotely across a WANOverview Transmission times for large frames become significantSizes Standard FrameMaximum frame size Max Frame Size Line Speed Range kbpsConfiguring Translational Bridging Translational Bridging Example Bridge Frame Handling Configuring Configuring Source Route Bridging OperationNode for SRB Individual BridgeBridging Procedure Connecting a Station to a Server in Source Route BridgingLAN for a Source Route Bridging operation Located on remote LAN CCC FigureServer’s Destination MAC Address Not on LAN AAA LAN Bridge Link WAN Adapter Transmits Each are Frame Across the WAN Server Responds with Specifically Routed Test Frame Then Step Action Result/DescriptionTransparent Bridging for Ethernet LANs LearningForwarder Forwarder Example LAN link WAN link Link errorStatistics FilteringHardware Accelerator LAN/WAN HandlersHardware Accelerator Functions Forwarder Functions Forwarder Initialization Aging Learn Only PeriodForwarder Database and Spanning Tree Using Filters Frame is dropped Multicast LinkList, the frame is dropped Control menu located in the Main menuTB Forwarding Transparent Bridge Configuration ParametersLocal MAC Address Bridge Link NumberBridge Filtering What is It? How Filtering is UsedParameter Action MAC Address FilteringParameter Action Value ParameterProcess MAC FilteringExample of a Frame Passing on a Bridge Link Mac Filtering Process Incoming and Outgoing FramesConfiguring the Bridge Link Record How To Configure ExampleMAC Address Filtering Examples First ExampleConfiguring the MAC Address Filter Table Why it is Important Identifying Address Links for MAC AddressingAddress Links Series Switch Support MAC Wildcard FilteringFiltering works Configuring the MAC Address Filter Table Broadcast frames in the LAN networkCategories Incoming Source Address Link Action These parameters make up the MAC Address Filter TablePASS, BLOCK, PASSLIST, Blocklist PassIncoming Destination Address Link Action Outgoing Source Address Link ActionList of Links Outgoing Destination Address Link ActionProtocol Filtering These parameters make up the Protocol Filter Table Record Protocol FilterProtocol SAP hex value Protocol TypeProtocol OUI/IP hex value Protocol ValueOutgoing Protocol Link Action Incoming Protocol Link ActionDsap Values Parameter Actions NetBIOS Name Filtering Broadcasts to and from the SVR* name patternTransparent Bridging Forcing a Local Checking NetBIOSDomain With FiltersHow to Configure Configuring NetBIOS Name FilteringNetBIOS Name Filtering Step ActionStep Action Result Select Configure ConfigureEntry Number 1 appears Bridge Bridge LinkNetBIOS Name Filter Table Configure NetBIOSBridge -NetBIOS Name Filter Name Filter TableTypical Filtering String TypeAscii Incoming NetBIOS Name List of Links Incoming NetBIOS Name Link ActionOutgoing NetBIOS Name List of LInks Outgoing NetBIOS Name Link ActionNetBIOS broadcasts filtered on the link NetBIOS Name Filtering StatisticsEach bridge link Check DetailedIBM NetBIOS Formats When to Use NetBIOS Name Filtering NetBIOS Packet FormatsAll of the following are true Either one of the following is trueSpanning Tree Protocol Entity Stpe Configuration Stpe Control= Auto Stpe Control = Manual MenuSpanning Tree TreeBridge Links Spanning Tree Protocol Entity Stpe Stpe Parameter Setting Considerations Example of aBridge Network Setting the Root Bridge Spanning Tree Bridge ID equals Bridge Priority Value in hex + MAC AddressDetermining Root Links Designated Links Type of Network Speed Stpe Path Cost Nature ConsiderExpected Number SVCsTwo Bridge Links Between B3 and B4 Spanning Tree Protocol Entity Stpe Timer Parameters Spanning Tree TimersHello Timer Max AgeConsiderations OtherMessage Events in Network Bridge Forward Delay TimerSpanning Tree Protocol Entity Stpe Aging Timer Bridges can adjust to the changeLocation and forwards packets to it properly LLC2 Local Termination Preventing session timeouts in a Bridging applicationTerminal session, causing Well as network delaysBefore Local After LocalSupported TopologiesImproper LT Proper LT configuration LLC Protocol LLC Frame Description LLC2 Frame DescriptionType Name Description Local Termination does not spoof Local Termination spoofsBridging 105 Local Termination Configuring Local TerminationBoot Type LLC LT Station StepStation Table Entry Number T2 Rx Ack Timer WAN Parameters T1Reply TimerLocal SAP LLC Profile NameTi Inactivity Timer Boot Type LLC LT WAN ParametersN3 ACK Delay Count N2 Retry CountTx Window Size Configuration Entry NumberLCC LT WAN Data Priority HIGH, MEDIUM, LOWT1 Reply Timer 112 Bridging Deleting LT Configuration Records 27x switch, as shown in Figure Mixed LAN OperationMixed LAN Environment Limitations Bridge Link Parameters menu Select Configure BridgeBridge Link Parameters from CTP Main menu, to activate Bridge linkBothsrandtb Dual LAN Ethernet System powerupSupported RoutingDual Ethernet LAN CmemParameters For Details onLAN Server Subsystem Alarms Example of LCC Configuring the LSS RecordRecord Virtual Port’s MAC AddressDisable ENABLE, DisableVirtual Bridge ID Path Trace ControlStatistics Menu screen Bridge StatisticsStpe Status Spanning Tree StatisticsStatus report Term DescriptionState Disabled The Stpe is disabled. If Stpe ControlAre Parameter is MANDetailed Bridge Link Statistics First Detailed Bridge Link StatisticsScreen Terms RIF Link Filter Bridge Link Filter SummarySummary DescriptionBridging 131 Stats Example Transparent Bridge Forwarding Table StatisticsStats Descriptions Shown in FigureBridging 133 Terms-Transparent Bridge Second Transparent Bridge Detailed Bridge Link StatisticsFF-FF-FF-FF-FF-FF Frame Totals This is a count of the number of framesReceived/transmitted of all types on this link LAN Connection Statistics Statistics MenuDetailed LAN Connection Statistics Detailed LAN Connection Statistics Second Last clear diagnostic code This is the diagnostic code Explains why the last call was clearedConnection and explains why the call was cleared SVCs. The possible states are Blank for PVCs blankBridging 139 Connection Summary Statistics Example of LAN shows the LAN Connection Summary StatisticsHeading Description LLC2 LT Session Summary StatisticsSAP Remote MAC AddrHeading Session Statistics LLC2 LT Detailed Session StatisticsLast Statistics Last time statistics were reset Reset Routing information field used in all frames transmittedField, ring number, and bridge number information Heading Description Local Station Session Summary Heading Description Remote Spoofer Session Summary Reset Statistics 148 Bridging Technical Support 3ComFacts Automated Fax Service Access by Analog ModemAccess by Digital Modem Country Data Rate Telephone NumberSupport from 3ComCountry Telephone Number Country Telephone Number Fax Number Numerics IndexLAN OUI URL A-1 Index-5