T1 Reply Timer | EXP Computer S200 manual

LLC2 Local Termination

T1 Reply Timer

Range:	1 to 25 (seconds)

Default:	1

Description:	This Ack timer is used by a station to detect a failure of the
	remote station to acknowledge an outstanding I frame or supervi-
	sory frame with the pole bit set to 1.

Boot Type:	Tables and Node Record.

T2 Rx ACK Timer

Range:	1 to 255 (tenths of seconds)

Default:	1

Description:	Specifies how long the station withholds acknowledgment of a
	frame from the remote station that requires acknowledgment. This
	reduces the number of acknowledgments generated by a link
	station. When the timer expires, the link station immediately sends
	an acknowledgment for all received frames not yet acknowledged.

Boot Type:	Tables and Node Record.

Ti Inactivity Timer

Range:	2 to 255 (seconds)

Default:	30

Description:	The Idle Timer is used by a station to detect an inoperative
	condition of the logical link. This timer starts when the link is idle
	(no data to pass and no outstanding acknowledgments). When the
	timer, expires, the station sends a supervisory frame with the poll
	bit set to 1.

Boot Type:	Tables and Node Record.

N2 Retry Count

Range:	1 to 20

Default:	8

Description:	Specifies the number of times an I frame or supervisory frame
	with poll bit set to 1 is transmitted due to T1 acknowledgment
	timeout before the logical link is declared down (inoperative).

Boot Type:	Tables and Node Record.

Bridging

111

T0008-16F

Release 5.2M

Image 115

EXP Computer S200 manual T1 Reply Timer

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 Across a WAN Basic Remote Bridging ExamplesWAN 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 Aging Period used for Ethernet only Learn Only 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 Protocol Filter Action Netbios Name 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 Learning Transparent Bridging for Ethernet LANsForwarder Filtering LAN link WAN link Link errorForwarder Example Statistics Accelerator LAN/WAN Handlers HardwareHardware 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 Identifying Address Links for MAC Addressing Why it is ImportantAddress Links MAC Wildcard Filtering Series Switch SupportFiltering works Broadcast frames in the LAN network Configuring the MAC Address Filter TableCategories 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 Broadcasts to and from the SVR* name pattern NetBIOS Name FilteringTransparent 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 String Type Typical FilteringAscii 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 Example of a Stpe Parameter Setting ConsiderationsBridge Network Bridge ID equals Bridge Priority Value in hex + MAC Address Setting the Root Bridge Spanning TreeDetermining 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 Bridges can adjust to the change Aging TimerLocation 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 Topologies SupportedImproper LT LLC Protocol LLC Frame Description LLC2 Frame Description Proper LT configurationType Name Description Local Termination does not spoof Local Termination spoofs Bridging 105 Local Termination Configuring Local Termination Step Boot Type LLC LT StationStation 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 Mixed LAN Operation 27x switch, as shown in FigureMixed 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 Frame Totals This is a count of the number of frames FF-FF-FF-FF-FF-FFReceived/transmitted of all types on this link Statistics Menu LAN Connection StatisticsDetailed 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 Routing information field used in all frames transmitted Last Statistics Last time statistics were reset ResetField, 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 3Com Support fromCountry Telephone Number Country Telephone Number Fax Number Numerics Index LAN OUI URL A-1 Index-5