Stpe Control, Auto, Man, Bad Hello Threshold | EXP Computer S200

Configuring the PathBuilder S200 Series Switch for Bridging Operation

*STPE Control

Range:	AUTO, MAN

Default:	MAN

Description:	The Spanning Tree Protocol Entity (STPE) module in the Path-
	Builder S200 series switch provides automatic calculation of the
	spanning tree. Spanning tree allows for the proper support of single
	route broadcast frames that occur in LANs. This parameter controls
	how a bridge determines the Spanning Tree: either automatically
	using the STPE, or manually using additional parameters in the
	bridge link record.
	• AUTO: The bridge participates in Spanning Tree Protocol
	(STP) and automatically determines the single path between
	LANs using the “Path Costs” assigned to the different links.
	Bridge protocol data units (BPDUs) are special frames used to
	continually communicate this information between bridges.
	• MAN: The Spanning Tree is configured by the network
	administrator. This is done using the STPE Link State
	parameter found in the next section, “Bridge Link Parameters.”
	Configure all bridges in your network to MANual if you are not an
	expert user of Spanning Tree protocol operation. This prevents
	problems in operation, especially when lower speed WAN links are
	involved in forming bridges.

Note

If STPE Control parameter is set to MAN, the following parameter appears.

Bad Hello Threshold

Range:	10 to 30

Default:	15

Description:	Use this parameter to generate alarms when some bridges are
	configured AUTO and others are configured MAN in order to
	detect nonmatching configurations.
	A Bad Hello counter is incremented when a HELLO Protocol Data
	Unit (PDU) is received while the STPE Control parameter is
	configured to MAN. An event (alarm) is generated when the
	counter exceeds the value of this parameter. The event is generated
	only once during the Bad Hello Time.

Note

If STPE Control parameter is set to MAN, the following parameter appears.

Bad Hello Timeout

Range:	10 to 30

Default:	15

Bridging

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T0008-16F

Release 5.2M

Image 27

EXP Computer S200 manual Stpe Control, Auto, Man, Bad Hello Threshold, Bad Hello Timeout

Contents

3Com Corporation Restricted Rights Legend Restricted Rights Notification for U.S. Government Users Proprietary Material Page Multiple LANs SolutionsOverview Functionality Transparent TranslationalBridging No Local Bridging This Manual Topic This Notice Topic Bridging Primer Bridging Features and CapabilitiesSwitches Introduction Ethernet LAN WAN application, but you can also bridge across an X.25 WAN ExampleEthernet Bridge Operation Mixed LAN Bridging MAC Addressing LT Example LLC2 Local TerminationLLC2 Local Termination Autolearn for Local Termination Filtering NetBIOS NameFiltering Mac Address Spanning Tree Protocol What Is It? Automatic Manual Spanning Tree Support Dual Ethernet LANs Basic Remote Bridging Examples Across a WANWAN or Permanent Virtual Circuit PVC for Frame Relay Example of Bridges in an SVC Arrangement Support BridgeConnections LAN Interface Bridging Interface Connections Between WAN and LAN Setting Up WAN Operation for Bridging Setting Up WAN Operation for Bridging Configure Maximum Number of Bridge Links Bridge ParametersParameters These parameters make up the Bridge Parameter Record MAN Bad Hello TimeoutStpe Control AUTO, MAN Learn Only Period used for Ethernet only Aging Period used for Ethernet onlyBridge WAN Data Priority used for Ethernet only Bridged Protocols Bridge Link Parameters control the characteristics of this connectionBridge Link Parameters Bridge links as links to the networks attached to it SR, TB, Bothsrandtb These parameters make up the Bridge Link RecordEntry Number BridgeType NONE, PASS, Block Hop Count LimitLargest Frame Size MAC Address Filter Action Netbios Name Filter Action Protocol Filter ActionStpe Link State Virtual Ring Number Link ModeNORMAL,RFC1294, Trans Normal Table Parameters LAN Connection TableOver the WAN LAN Connection LAN Connection Type LAN Forwarder TypeROUT, BRID, Brout Rout Lcon Queue Limit Encapsulation TypeCodex Autocall Mnemonic Traffic Priority Billing RecordsOFF, on OFF Transmission times for large frames become significant Where bridging is done remotely across a WANLimiting Bridge Frame Sizes Overview Max Frame Size Line Speed Range kbps Standard FrameSizes Maximum frame size Configuring Translational Bridging Translational Bridging Example Bridge Frame Handling Individual Bridge Configuring Source Route Bridging OperationConfiguring Node for SRB Bridging Located on remote LAN CCC Figure Connecting a Station to a Server in Source Route BridgingProcedure LAN for a Source Route Bridging operation Server’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/Description Transparent Bridging for Ethernet LANs LearningForwarder Filtering LAN link WAN link Link errorForwarder Example Statistics Hardware Accelerator LAN/WAN HandlersHardware Accelerator Functions Forwarder Functions Forwarder Initialization Aging Learn Only Period Forwarder Database and Spanning Tree Using Filters Control menu located in the Main menu Multicast LinkFrame is dropped List, the frame is dropped Bridge Link Number Transparent Bridge Configuration ParametersTB Forwarding Local MAC Address Bridge Filtering What is It? How Filtering is Used Parameter Action MAC Address Filtering Parameter Action Value Parameter Process MAC Filtering Example of a Frame Passing on a Bridge Link Mac Filtering Process Incoming and Outgoing Frames First Example How To Configure ExampleConfiguring the Bridge Link Record MAC Address Filtering Examples Configuring 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 Pass These parameters make up the MAC Address Filter TableIncoming Source Address Link Action PASS, BLOCK, PASSLIST, Blocklist Incoming Destination Address Link Action Outgoing Source Address Link Action List of Links Outgoing Destination Address Link Action Protocol Filtering These parameters make up the Protocol Filter Table Record Protocol Filter Protocol Value Protocol TypeProtocol SAP hex value Protocol OUI/IP hex value Outgoing Protocol Link Action Incoming Protocol Link Action Dsap Values Parameter Actions NetBIOS Name Filtering Broadcasts to and from the SVR* name patternTransparent Bridging Filters Checking NetBIOSForcing a Local Domain With Step Action Configuring NetBIOS Name FilteringHow to Configure NetBIOS Name Filtering Bridge Bridge Link Select Configure ConfigureStep Action Result Entry Number 1 appears Name Filter Table Configure NetBIOSNetBIOS Name Filter Table Bridge -NetBIOS Name Filter Typical Filtering String TypeAscii Incoming NetBIOS Name List of Links Incoming NetBIOS Name Link Action Outgoing NetBIOS Name List of LInks Outgoing NetBIOS Name Link Action Check Detailed NetBIOS Name Filtering StatisticsNetBIOS broadcasts filtered on the link Each bridge link Either one of the following is true NetBIOS Packet FormatsIBM NetBIOS Formats When to Use NetBIOS Name Filtering All of the following are true Tree Configuration Stpe Control= Auto Stpe Control = Manual MenuSpanning Tree Protocol Entity Stpe Spanning Tree Bridge 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 SVCs ConsiderNature Expected Number Two Bridge Links Between B3 and B4 Spanning Tree Protocol Entity Stpe Max Age Spanning Tree TimersTimer Parameters Hello Timer Considerations Other Message Events in Network Bridge Forward Delay Timer Spanning 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 application After Local Well as network delaysTerminal session, causing Before Local Supported TopologiesImproper LT Proper LT configuration LLC Protocol LLC Frame Description LLC2 Frame DescriptionType Name Description Local Termination does not spoof Local Termination spoofs Bridging 105 Local Termination Configuring Local Termination Boot Type LLC LT Station StepStation Table Entry Number LLC Profile Name WAN Parameters T1Reply TimerT2 Rx Ack Timer Local SAP N2 Retry Count Boot Type LLC LT WAN ParametersTi Inactivity Timer N3 ACK Delay Count HIGH, MEDIUM, LOW Configuration Entry NumberTx Window Size LCC LT WAN Data Priority T1 Reply Timer 112 Bridging Deleting LT Configuration Records 27x switch, as shown in Figure Mixed LAN OperationMixed LAN Environment Limitations CTP Main menu, to activate Bridge link Select Configure BridgeBridge Link Parameters menu Bridge Link Parameters from Bothsrandtb Dual LAN Ethernet System powerup Cmem RoutingSupported Dual Ethernet LAN Parameters For Details on LAN Server Subsystem Alarms Virtual Port’s MAC Address Configuring the LSS RecordExample of LCC Record Path Trace Control ENABLE, DisableDisable Virtual Bridge ID Statistics Menu screen Bridge Statistics Term Description Spanning Tree StatisticsStpe Status Status report Parameter is MAN Disabled The Stpe is disabled. If Stpe ControlState Are Detailed Bridge Link Statistics First Detailed Bridge Link Statistics Screen Terms RIF Description Bridge Link Filter SummaryLink Filter Summary Bridging 131 Shown in Figure Transparent Bridge Forwarding Table StatisticsStats Example Stats Descriptions Bridging 133 Terms-Transparent Bridge Second Transparent Bridge Detailed Bridge Link Statistics FF-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 SVCs. The possible states are Blank for PVCs blank Explains why the last call was clearedLast clear diagnostic code This is the diagnostic code Connection and explains why the call was cleared Bridging 139 Connection Summary Statistics Example of LAN shows the LAN Connection Summary Statistics Remote MAC Addr LLC2 LT Session Summary StatisticsHeading Description SAP Heading Session Statistics LLC2 LT Detailed Session Statistics Last 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 Country Data Rate Telephone Number Access by Analog Modem3ComFacts Automated Fax Service Access by Digital Modem Support from 3ComCountry Telephone Number Country Telephone Number Fax Number Numerics Index LAN OUI URL A-1 Index-5