CONTENTS Title Page Copyright Page Preface Part 1 DECnet Transport 1 DECnet Tools Invoking NCP on VMS Invoking NCP on PCs NCP Command Syntax Identifying Nodes and Objects Circuit and Line Values Logging Events NCP Help Using NCP on the Configuration Database DEFINE Command SET Command LIST and SHOW Commands PURGE and CLEAR Commands Using NCP for Troubleshooting LOOP Commands MIRROR Command LOOP EXECUTOR Command LOOP LINE CONTROLLER Command LOOP NODE Command LOOP CIRCUIT Command Token Ring Diagnostics Running DEQRA$DIAGS Board Status Test Lobe Loopback Test Ring Loopback Test 2 Isolating DECnet Problems DECnet Problem-Isolation Flowcharts VMS Server Master Procedure (DECnet) VMS Server Transport Procedure (DECnet) VMS File Server Procedure (DECnet) VMS Remote Printing Procedure (DECnet) ULTRIX Server Master Procedure (DECnet) ULTRIX Server Transport Procedure (DECnet) ULTRIX File Server Procedure (DECnet) ULTRIX Remote Printing Procedure (DECnet) OS/2 Server Master Procedure (DECnet) OS/2 Server Procedure (DECnet) OS/2 LAN Manager Procedure (DECnet) DOS Client Master Procedure (DECnet) DOS Client Transport Procedure (DECnet) DOS Client LAN Manager Procedure (DECnet) DOS Client Remote Printing Procedure (DECnet) OS/2 Client Master Procedure (DECnet) OS/2 Client Transport Procedure (DECnet) OS/2 Client LAN Manager Procedure (DECnet) OS/2 Client Remote Printing Procedure (DECnet) Client Loopback Test (DECnet) Troubleshooting Hardware and Configuration (DECnet) Duplicate Node Definition Procedure (DECnet) Maximum Links/Connections Procedure (DECnet) Loop Tests (DECnet) Server-to-Server Loop Test (DECnet) Client-to-Server Loop Test (DECnet) Client-to-Client Loop Test (DECnet) Network Connection Procedure (DECnet) Daisy Chain Segment Test (DECnet) DEMPR Configuration Segment Test (DECnet) Network Segment Interface Procedure (DECnet) 3 DECnet Messages Organization Troubleshooting Notes Aborted Service Request Adjacency Rejected/Adjacency Up Asynchronous DECnet Problems Babbling Device Broadcast Storm Circuit State Problems Connect Failed, Access Control Rejected Connect Failed, Unrecognized Object Device Not Mounted Dialup Problems Insufficient Resources at Remote Node Invalid Parameter Value LAN Bridge Cannot Downline Load LAN Segment Communication Problem Line Synchronization Lost Login Information Invalid Network Object Unknown Network Partner Exited Node Out of Range Packet Loss Partial Routing Update Loss Partitioned Area Permission Denied Remote Node Is Not Currently Reachable Verification Reject PC-Based Messages Part 2 Transmission Control Program and Internet Protocol (TCP/IP) 4 TCP/IP Tools VMS Tools Log Files SYS$MANAGER:OPERATOR.LOG VMS Netserver Log File SYS$ERRORLOG:ERRLOG.SYS SYS$MANAGER:ACCOUNTNG.DAT LOOP Command Installation Verification Procedure (IVP) RUNNING IVP IVP Messages ULTRIX Tools arp Command netstat Command ping Command Log Files ULTRIX Counters DOS Tools arp Command netstat Command ping Command 5 Isolating TCP/IP Problems TCP/IP Problem-Isolation Flowcharts VMS Server Master Procedure (TCP/IP) VMS Server Transport Procedure (TCP/IP) DECnet Transport Verification (TCP/IP) UCX Transport Verification VMS File Server Procedure (TCP/IP) VMS Remote Printing Procedure (TCP/IP) ULTRIX Server Master Procedure (TCP/IP) ULTRIX Server Transport Procedure (TCP/IP) ULTRIX File Server Procedure (TCP/IP) ULTRIX Remote Printing Procedure (TCP/IP) DOS Client Master Procedure (TCP/IP) DOS Client Transport Procedure (TCP/IP) DOS Client LAN Manager Procedure (TCP/IP) DOS Client Remote Printing Procedure (TCP/IP) Troubleshooting Hardware and Configuration (TCP/IP) Duplicate Node Definition Procedure (TCP/IP) Maximum Links/Connections Procedure (TCP/IP) Network Connection Procedure (TCP/IP) Daisy Chain Segment Test (TCP/IP) DEMPR Configuration Segment Test (TCP/IP) Network Segment Interface Procedure (TCP/IP) 6 TCP/IP Messages Organization Troubleshooting Notes Server-Based Messages Connection Timed Out Host Is Unreachable Login Incorrect Network Is Unreachable Permission Denied Client-Based Messages for DOS Message Format Load/Init Errors FTP Errors Network Maintenance Errors Part 3 Local Area Transport (LAT) 7 Local Area Transport (LAT) Tools LAT Control Program (LATCP) LAN Traffic Monitor (LTM) LTM Hardware and Software LTM Privilege Requirements Running LTM Terminal Server Manager (TSM) TSM Requirements Running TSM 8 Isolating Local Area Transport (LAT) Problems LAT Problem-Isolation Flowcharts Troubleshooting Notes VMS Server Master Procedure (LAT) VMS Server Transport Procedure VMS Server LAT Service Procedure VMS Server Maximum Links/Connections Procedure VMS Server Remote Printer Services Procedure (LAT) ULTRIX Server Master Procedure DOS Client Master Procedure (LAT) DOS Client Configuration Procedure DOS Client Transport Procedure (LAT) DOS Client Printer Services Procedure (LAT) DOS Client Maximum Links/Connections Procedure OS/2 Client Master Procedure (LAT) OS/2 Client Configuration Procedure Introduction to OS/2 Configuration Files Sample Configuration Files for OS/2 Sample OS/2 CONFIG.SYS File Sample OS/2 STARTUP.CMD File Sample OS/2 PCSAOS2.CMD File OS/2 Client Transport Procedure (LAT) Network Connection Procedure Network Segment Interface Procedure Common Network Problems Using LAT LAT Client Problems Unable to connect to LAT server node Cannot connect to a particular LAT service LAT connects to the wrong service LAT will not load LAT loses connections LAT loses characters when using SETHOST or VT320 LAT uses too much memory LAT does not work under an operating environment LAT Terminal Server Problems Terminal server connection failures 9 LAT Messages DOS Client Messages OS/2 Client Messages Part 4 Local Area System Transport (LAST) 10 Local Area System Transport (LAST) Tools LASTCP on VMS EXIT HELP SHOW Showing Information About Nodes Showing Network Counters Showing the LASTDRIVER Status Showing Known Servers START TRANSPORT START TRANSPORT /ALL_CONTROLLERS START TRANSPORT /CHECKSUM START TRANSPORT /CIRCUIT_MAXIMUM START TRANSPORT /CONTROLLERS START TRANSPORT /DEVICE START TRANSPORT /GROUP START TRANSPORT /NODE_NAME START TRANSPORT /SLOW_MODE START TRANSPORT /TIMEOUT START TRANSPORT /TRANSMIT_QUOTA STOP ZERO LASTCP on OS/2 Installing and Starting LAST Changing the Characteristics or Displaying Information LAST on DOS 11 Isolating Local Area System Transport (LAST) Problems LAST Problem-Isolation Flowcharts VMS Server Master Procedure (LAST) VMS Server Transport Procedure (LAST) VMS Server Disk Services Procedure (LAST) VMS Server File and Print Services Procedure (LAST) VMS Server Maximum Connections Procedure (LAST) Disk Services Maximum Connection Procedure File and Printer Services Maximum Connection Procedure DOS Client Master Procedure (LAST) Troubleshooting Considerations DOS Client Required Components Procedure (LAST) Component Load Order DOS Client Memory Interaction Procedure (LAST) DOS Client Transport Procedure (LAST) DOS Client Disk Services Procedure (LAST) DOS Client File and Printer Services Procedure (LAST) OS/2 Client Master Procedure (LAST) Troubleshooting Considerations OS/2 Client Required Components Procedure (LAST) Component Load Order OS/2 Client Transport Procedure (LAST) OS/2 Client Disk Services Procedure (LAST) Network Connection Procedure Network Segment Interface Procedure 12 LAST Messages LAST-Related Messages on VMS LASTCP Messages LAD$KERNEL Messages LAD Log File Messages LAST-Related Messages on DOS Messages Generated by LAST LADDRV.SYS Messages LAD Messages LANSESS Messages LAST-Related Messages on OS/2 LASTCP Messages LASTDD.SYS Messages LADDRV Messages Part 5 Appendixes A Routing Layer Events B Tuning the DOS Client Responsiveness to Lost Packets Connection Persistence Executor Retransmit Factor Parameter Executor Confidence Timer Parameter C Ethernet Configuration Guidelines Baseband Ethernet ThinWire Ethernet Fiber-Optic Cable DELNI Local Network Interconnect DEMPR ThinWire Multiport Repeaters DEREP Ethernet Repeaters Bridges D Token Ring Concepts and Terms Glossary /etc/hosts . . . Asynchronous communications Attaching device . . . Carrier Sense Multiple-Access with Collision Detect (CSMA/CD) Channel . . . DAP Dedicated line . . . Domain name system Dotted decimal notation . . . Filtering Flow control . . . ICMP Icon . . . IP Job Spawner . . . Level 2 router Lines . . . Local resources Logical links . . . Name server Netacp . . . Network number Network Services Protocol (NSP) . . . Parity Path . . . Printer services Process identification (PID) . . . Resolver Resource sharing . . . Routing node Routing table . . . SNA SNMP . . . TCP/IP Test port . . . Zone EXAMPLES 3-1 SYSGEN SHOW/DEVICE Display 7-1 LAN Traffic Monitor Display 7-2 Terminal Server Manager Output FIGURES 2-1 Problem with Untried Network (DECnet Flowchart 1) 2-2 When Hardware Has Changed (DECnet Flowchart 2) 2-3 When Software Is Unmodified (DECnet Flowchart 3) 2-4 Transport Problem (DECnet Flowchart 4) 2-5 File Server Problem (DECnet Flowchart 5) 2-6 Remote Printing Problem (DECnet Flowchart 6) 2-7 Examples of Node Databases 2-8 Examples of Node Databases 2-9 Examples of Node Databases 2-10 Examples of Node Databases 2-11 Loopback Connector Assembly 2-12 Disconnecting ThinWire Cabling From Client 2-13 Loopback Connector Installation 2-14 Examples of Node Databases 2-15 Checking Daisy Chain Configuration Segments 2-16 Checking DEMPR Configuration Segments 3-1 VMS Access Control 3-2 Area Partitioned Due to Multiple Failures 3-3 Area Partitioned Due to Configuration Weaknesses 5-1 Problem with Untried Network (TCP/IP Flowchart 1) 5-2 When Hardware Has Been Changed (TCP/IP Flowchart 2) 5-3 When Software Is Unmodified (TCP/IP Flowchart 3) 5-4 Transport Problem (TCP/IP Flowchart 4) 5-5 File Server Problem (TCP/IP Flowchart 5) 5-6 Remote Printing Problem (TCP/IP Flowchart 6) 5-7 Correct Setup for VMS Server 5-8 Correct Setup of ULTRIX Server 5-9 Correct Setup for DOS Client 5-10 Checking Daisy Chain Configuration Segments 5-11 Checking DEMPR Configuration Segments 8-1 Problems on an Untried Network (LAT Flowchart 1) 8-2 When Hardware Has Changed (LAT Flowchart 2) 8-3 When Software Is Unmodified (LAT Flowchart 3) 8-4 Problem with Transport (LAT Flowchart 4) 8-5 Printing Problems (LAT Flowchart 5) 8-6 VMS Server Set Up Correctly 11-1 Problem with Untried Network (LAST Flowchart 1) 11-2 When Hardware Has Changed (LAST Flowchart 2) 11-3 When Software Is Unmodified (LAST Flowchart 3) 11-4 Problem with Transport (LAST Flowchart 4) 11-5 Problem with Disk Services (LAST Flowchart 5) 11-6 Problem with File Services (LAST Flowchart 6) 11-7 Problem with Print Services (LAST Flowchart 7) 11-8 VMS Server Set Up Correctly 11-9 DOS Client Set Up Correctly 11-10 OS/2 Client Set Up Correctly D-1 Example of Token Ring Network D-2 Example of Token Ring Attaching Device, Lobe, and MAU TABLES 1-1 Example of NCP Command Syntax 1-2 Definition of Circuit and Line ID 1-3 DECnet-VAX Device Names 1-4 DECnet-PC Device Names 2-1 Key Questions for DECnet 3-1 Network Problems and Extent of Disturbance on the Network 3-2 NCP Executor Proxy Access Parameters 3-3 Specifying the Device Type 3-4 LAN Bridge 100 or 150 Indicator Lights 3-5 LAN Bridge 100 or 150 Switch Settings 3-6 NCP Proxy Access Parameters 4-1 Troubleshooting Tools 4-2 IVP Error Messages 4-3 netstat Command Options 4-4 ping Command Options 4-5 arp Command Options 4-6 netstat Command Options 5-1 Key Questions for TCP/IP 5-2 DOS-Based NMF Device Drivers 5-3 DOS-Based NMF TSR Programs 7-1 LAT Control Program 8-1 Key Questions for LAT 8-2 Print Queue States and Conditions 11-1 Key Questions for LAST 11-2 CONFIG.SYS Components Required With DLLDEPCA.EXE 11-3 CONFIG.SYS Components Required with DLLNDIS.EXE B-1 Delay Weights B-2 Delay Factors B-3 Default Retransmit Factors