Lan | EXP Computer S200 specs

Forwarding delay 87 Frame handling

All Route Broadcast 39 duplicate frames 36 single route broadcast 39

Frame passing example 61

Frames

between spoofers 104 frame types not spoofed 104 frame types spoofed 104 LLC description 103 LLC1 TEST 42

LLC2 description 103

Frames Discarded Congestion message 36

H

HDLC 2 Hop

bridge 16

I

IBM NetBIOS 74

IBM LAN Manager functionality 120

IBM LAN Network Manager Bridge View (Figure) 121 LSS Record 123

Incoming Destination Address link function 64

Incoming Destination Address Link Action parame- ter

function 58

Incoming Protocol Link Action parameter description 75

Incoming Source Address example 62

link 64

Incoming Source Address Link Action parameter function 58

IPX 74

L

LAN

port connection 41 LAN Bridge Server 120 LAN Connection 136 LAN Connection Subaddress

defining 22

LAN Connection Table 31 configuring 31

LAN connections example 42

LAN Forwarder Type 32 LAN links 17

LAN Server Subsystem Configuration Report Server 120 Ring Error Monitor 120

Ring Parameter Server 120 See LSS 120

LAN Server Subsystem (LSS) 120 List of Links

parameter function 59

Protocol filtering description 75 LLC1 TEST frame 42

LLC2 recovery procedures 36 Local Termination

autolearn 11 configuring 106 described 10, 100 example 10, 100 supported topologies 102

LSS (LAN Server Subsystem) 120 LSS Record 120

configuring 122

M

MAC Address Filter Table 58 configuring 66 function 58

MAC Address filtering

description 58 examples 62 process 60

MAC Address Filtering Action parameters application 61

Block 59

None 59

Pass 59

MAC Address parameter function 58

MAC Wildcard Filtering 65 Manual spanning tree 87 Multicast Protect Flag 55

N

NCR Bisync 2 NetBIOS

description 76 NetBIOS Name Filtering

Configuring 78 network supplier support A-2Node

Index-2

Image 158

EXP Computer S200 manual Lan

Contents

3Com Corporation Restricted Rights Notification for U.S. Government Users Restricted Rights Legend Proprietary Material Page Functionality SolutionsOverview Multiple LANs No Local Bridging TranslationalBridging Transparent This Manual Topic This Notice Topic Introduction Bridging Features and CapabilitiesSwitches Bridging Primer Ethernet LAN Operation ExampleEthernet Bridge WAN application, but you can also bridge across an X.25 WAN Mixed LAN Bridging MAC Addressing Termination LLC2 Local TerminationLLC2 Local LT Example Autolearn for Local Termination Mac Address NetBIOS NameFiltering Filtering What Is It? Automatic Manual Spanning Tree Support Spanning Tree Protocol Dual Ethernet LANs WAN or Permanent Virtual Circuit PVC for Frame Relay Basic Remote Bridging ExamplesAcross a WAN Example of Bridges in an SVC Arrangement LAN Interface BridgeConnections Support Bridging Setting Up WAN Operation for Bridging Interface Connections Between WAN and LAN Setting Up WAN Operation for Bridging Configure These parameters make up the Bridge Parameter Record Bridge ParametersParameters Maximum Number of Bridge Links AUTO, MAN Bad Hello TimeoutStpe Control MAN Bridge WAN Data Priority used for Ethernet only Learn Only Period used for Ethernet onlyAging Period used for Ethernet only Bridged Protocols Bridge links as links to the networks attached to it Parameters control the characteristics of this connectionBridge Link Parameters Bridge Link BridgeType These parameters make up the Bridge Link RecordEntry Number SR, TB, Bothsrandtb MAC Address Filter Action Hop Count LimitLargest Frame Size NONE, PASS, Block Stpe Link State Netbios Name Filter ActionProtocol Filter Action Normal Link ModeNORMAL,RFC1294, Trans Virtual Ring Number LAN Connection LAN Connection TableOver the WAN Table Parameters Rout LAN Forwarder TypeROUT, BRID, Brout LAN Connection Type Autocall Mnemonic Encapsulation TypeCodex Lcon Queue Limit OFF Billing RecordsOFF, on Traffic Priority Overview Where bridging is done remotely across a WANLimiting Bridge Frame Sizes Transmission times for large frames become significant Maximum frame size Standard FrameSizes Max Frame Size Line Speed Range kbps Configuring Translational Bridging Translational Bridging Example Bridge Frame Handling Node for SRB Configuring Source Route Bridging OperationConfiguring Individual Bridge Bridging LAN for a Source Route Bridging operation Connecting a Station to a Server in Source Route BridgingProcedure Located on remote LAN CCC Figure 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 Step Action Result/Description Then Forwarder Transparent Bridging for Ethernet LANsLearning Statistics LAN link WAN link Link errorForwarder Example Filtering Hardware Accelerator Functions HardwareAccelerator LAN/WAN Handlers Forwarder Functions Forwarder Initialization Learn Only Period Aging Forwarder Database and Spanning Tree Using Filters List, the frame is dropped Multicast LinkFrame is dropped Control menu located in the Main menu Local MAC Address Transparent Bridge Configuration ParametersTB Forwarding Bridge Link Number What is It? How Filtering is Used Bridge Filtering MAC Address Filtering Parameter Action Parameter Parameter Action Value MAC Filtering Process Mac Filtering Process Incoming and Outgoing Frames Example of a Frame Passing on a Bridge Link MAC Address Filtering Examples How To Configure ExampleConfiguring the Bridge Link Record First Example Configuring the MAC Address Filter Table Address Links Why it is ImportantIdentifying Address Links for MAC Addressing Filtering works Series Switch SupportMAC Wildcard Filtering Categories Configuring the MAC Address Filter TableBroadcast frames in the LAN network PASS, BLOCK, PASSLIST, Blocklist These parameters make up the MAC Address Filter TableIncoming Source Address Link Action Pass Outgoing Source Address Link Action Incoming Destination Address Link Action Outgoing Destination Address Link Action List of Links Protocol Filtering Protocol Filter These parameters make up the Protocol Filter Table Record Protocol OUI/IP hex value Protocol TypeProtocol SAP hex value Protocol Value Incoming Protocol Link Action Outgoing Protocol Link Action Dsap Values Parameter Actions Transparent Bridging NetBIOS Name FilteringBroadcasts to and from the SVR* name pattern Domain With Checking NetBIOSForcing a Local Filters NetBIOS Name Filtering Configuring NetBIOS Name FilteringHow to Configure Step Action Entry Number 1 appears Select Configure ConfigureStep Action Result Bridge Bridge Link Bridge -NetBIOS Name Filter Configure NetBIOSNetBIOS Name Filter Table Name Filter Table Ascii Typical FilteringString Type Incoming NetBIOS Name Link Action Incoming NetBIOS Name List of Links Outgoing NetBIOS Name Link Action Outgoing NetBIOS Name List of LInks Each bridge link NetBIOS Name Filtering StatisticsNetBIOS broadcasts filtered on the link Check Detailed All of the following are true NetBIOS Packet FormatsIBM NetBIOS Formats When to Use NetBIOS Name Filtering Either one of the following is true Spanning Tree Configuration Stpe Control= Auto Stpe Control = Manual MenuSpanning Tree Protocol Entity Stpe Tree Bridge Links Spanning Tree Protocol Entity Stpe Bridge Network Stpe Parameter Setting ConsiderationsExample of a Determining Root Links Designated Links Setting the Root Bridge Spanning TreeBridge ID equals Bridge Priority Value in hex + MAC Address Type of Network Speed Stpe Path Cost Expected Number ConsiderNature SVCs Two Bridge Links Between B3 and B4 Spanning Tree Protocol Entity Stpe Hello Timer Spanning Tree TimersTimer Parameters Max Age Other Considerations Bridge Forward Delay Timer Message Events in Network Spanning Tree Protocol Entity Stpe Location and forwards packets to it properly Aging TimerBridges can adjust to the change Preventing session timeouts in a Bridging application LLC2 Local Termination Before Local Well as network delaysTerminal session, causing After Local Improper LT SupportedTopologies Type Name Description Proper LT configurationLLC Protocol LLC Frame Description LLC2 Frame Description Local Termination spoofs Local Termination does not spoof Bridging 105 Configuring Local Termination Local Termination Station Table Entry Number Boot Type LLC LT StationStep Local SAP WAN Parameters T1Reply TimerT2 Rx Ack Timer LLC Profile Name N3 ACK Delay Count Boot Type LLC LT WAN ParametersTi Inactivity Timer N2 Retry Count LCC LT WAN Data Priority Configuration Entry NumberTx Window Size HIGH, MEDIUM, LOW T1 Reply Timer 112 Bridging Deleting LT Configuration Records Mixed LAN Environment Limitations 27x switch, as shown in FigureMixed LAN Operation Bridge Link Parameters from Select Configure BridgeBridge Link Parameters menu CTP Main menu, to activate Bridge link Bothsrandtb System powerup Dual LAN Ethernet Dual Ethernet LAN RoutingSupported Cmem For Details on Parameters LAN Server Subsystem Alarms Record Configuring the LSS RecordExample of LCC Virtual Port’s MAC Address Virtual Bridge ID ENABLE, DisableDisable Path Trace Control Bridge Statistics Statistics Menu screen Status report Spanning Tree StatisticsStpe Status Term Description Are Disabled The Stpe is disabled. If Stpe ControlState Parameter is MAN Detailed Bridge Link Statistics Detailed Bridge Link Statistics First Screen Terms RIF Summary Bridge Link Filter SummaryLink Filter Description Bridging 131 Stats Descriptions Transparent Bridge Forwarding Table StatisticsStats Example Shown in Figure Bridging 133 Transparent Bridge Detailed Bridge Link Statistics Terms-Transparent Bridge Second Received/transmitted of all types on this link FF-FF-FF-FF-FF-FFFrame Totals This is a count of the number of frames Detailed LAN Connection Statistics LAN Connection StatisticsStatistics Menu Detailed LAN Connection Statistics Second Connection and explains why the call was cleared Explains why the last call was clearedLast clear diagnostic code This is the diagnostic code SVCs. The possible states are Blank for PVCs blank Bridging 139 Example of LAN shows the LAN Connection Summary Statistics Connection Summary Statistics SAP LLC2 LT Session Summary StatisticsHeading Description Remote MAC Addr Heading LLC2 LT Detailed Session Statistics Session Statistics Field, ring number, and bridge number information Last Statistics Last time statistics were reset ResetRouting information field used in all frames transmitted Heading Description Local Station Session Summary Heading Description Remote Spoofer Session Summary Reset Statistics 148 Bridging Technical Support Access by Digital Modem Access by Analog Modem3ComFacts Automated Fax Service Country Data Rate Telephone Number Country Telephone Number Support from3Com Country Telephone Number Fax Number Index Numerics LAN OUI URL A-1 Index-5