Digital Equipment DECserver 300 Instruction sheet

DECserver 300
Problem Solving
June 1989
Thismanualdescribesproblemsolvingtools andproceduresfor
the DECserver 300 terminal server. Itis intended forthe server
manager.
Supersession/Update Information: This is a new manual.
Software Version: DECserver 300
Vl.0
This manual applies to Version 1.0 of DECserver 300 and all
subsequentmaintenance releases up tothe next majorproduct
release.
Order Number: AA-NE42A-TE

AA-NE42A-TE
June 1989
Theinformation inthisdocumentissubjecttochangewithoutnoticeand shouldnotbe construedas a
commitmentby Digital EquipmentCorporation. Digital EquipmentCorporation assumes no respon-
sibility for any errors that may appear in this document.
Thesoftwaredescribedin thisdocumentisfurnished underalicense andmayonlybe used or copied
in accordance with the terms of such license.
Noresponsibilityis assumedforthe use orreliability of software on equipmentthat Is notsupplied by
Digital or its affiliated companies.
Copyright © 1989 by Digital Equipment Corporation
All Rights Reserved.
Printed in U.S.A.
The following are trademarks of Digital Equipment Corporation:
DEBNA DESVA
DEBNET DEUNA
DEC
~D~DDmDr"
DECconnect LAN Bridge
DECnet LA120
DECserver LN01
DECUS LN03
DELNI LQP02
DELUA MASSBUS
DELQA Micro/RSX
DEMPR MicroVAX
DEQNA PDP
DESOA Professional
Q-Bus
Rainbow
RSX
RSX-11
M-PLUS
ThinWire
ULTRIX-32
UNIBUS
VAX
VAXcluster
VAXmate
VAXstation
VMS
This manual was produced by Networks and Communications Publications.

Contents
Preface
1 Introduction to DECserver 300 Problem Solving
2 Troubleshooting Tools
2.1
2.2
2.3
2.4
2.4.1
2.4.2
2.5
2.5.1
2.5.2
2.5.3
The Console Port
................................... .
The DECserver 300 Self-Test
.......................... .
Types
of Errors -Fatal and Non-Fatal .................. .
The Seven-Segment Status Display
..................... .
Diagnostic Status and Error Codes
.................... .
Server Software Status Codes
....................... .
DECserver 300
TEST Commands ...................... .
The TEST SERVICE Command
..................... .
The
TEST PORT Command ......................... .
The
TEST LOOP Command ........................ .
3 What to Do First
2-1
2-2
2-2
2-2
2-4
2-6
2-8
2-8
2-9
2-9
iii

4 Problems on All Ports
4.1 Status Display Is Off-No DC Voltage .................. 4-1
4.2 Diagnostic Dot Is Off -Fatal Error or Test in Progress ...... 4-2
4.3 Diagnostic Dot Blinking (Non-Fatal Error) ................ 4-2
4.3.1 Error Messages 920 and 921 ......................... 4-3
4.3.2 Error Message 922 and 923 .......................... 4-3
4.3.3 Error Messages 930 and 931 ......................... 4--4
4.3.4 Error Messages 935 and 936 ......................... 4--4
4.3.5 Error Messages 925 and 926 ......................... 4-5
4.3.6 Error Messages 941, 942, 950, and 952 -Code 9 on
Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
4.4 Insufficient Memory Resources ......................... 4-8
4.5 No Console Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
4.6 Down-Line Loading Problems -Code 3 on the
Status Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 4-10
4.6.1 Down-Line Load Starts, Then Fails. . . . . . . . . .. . . . . . .. .. 4-10
4.6.2 Down-Line Load Does Not Start. . . . . . . . . . . . . . . . . . .. .. 4-12
4.7 Message Number 913 Appears. . . . . . . . . . . . . . . . .. . . . . .... 4-16
4.8 Server Port or PortDevice Hardward Problems. . . . . . . . . . . .. 4-18
5 Problems with Individual Port Devices
5.1 Check These Things First. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
5.2 An Interactive Terminal Is Not Working .................. 5-3
5.3 A PC File Transfer Fails. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-7
5.4 A Line Printer Fails at a Remote-Access Port
5-8
6 Problems with Service Nodes
6.1 Message Timing Problem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-2
6.2 LAT Protocol Errors .................................. 6-3
6.3 Authorized Groups Mismatch . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-4
6.4 Server Capacity Exceeded ............................. 6-4
iv

6.5 Service Node Software Not Rwming ..................... 6-5
6.6 Service Node Not Available ............................ 6-5
7 Problems with the Ethernet
8 Digital Equipment Corporation Service
8.1 Before You Contact Digital Equipment Corporation. . . . . . . . . 8-1
8.2 Repackaging a DECserver for Shipping . . . . . . . . . . . . . . . . . . .
8-2
8.3 Forwarding Up-Line Dump Data ........................ 8-2
Index
Figures
1-1 Network Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
1-2 Composition of Network Components . . . . . . . . . . . . . . . . . . . . 1-2
2-1 DECserver 300 Seven-Segment Status Display. . . . . . . . . . . . . 2-3
Tables
2-1 Self-Test Diagnostics Status and Error Codes .............. 2-5
2-2 Server Software Status Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
5-1 Port Device Problem -Check These Things First .......... 5-1
5-2 Port Device Problem -Check These Things First ........... 5-2
v

Preface
DECserver 300 ProblemSolving describes how to troubleshoot the DECserver 300
system softwareandhardware. Themanual also describes the troubleshooting tools
and their use.
Intended Audience
The manual is intended mainly for the server manager, but also Digital Equipment
Corporation training, field service, and manufacturing personnel. Knowledge
of
Ethernet local area networks is a prerequisitefor using the manual effectively.
Document Structure
Chapter 1
Chapter 2
Chapter 3
Chapter 4
Chapter 5
Chapter 6
Chapter 7
Chapter 8
Briefly introduces DECserver 300 problem solving.
Describes the troubleshooting tools and the hardware and
software features that are useful for troubleshooting.
Describes the initial steps to take when you see a problem.
Describes how to troubleshoot problems that involve all the
server ports.
Describes how to troubleshoot problems that affect one or
more, but not all, ports and port devices.
Describes problems involving communication with service
nodes on the Ethernet.
Describes problems on the Ethernet interface.
Describes how to use Digital Equipment Corporation main-
tenance services.
vii

Graphic Conventions Used In This Guide
viii
To use this manual effectively, familiarize yourselfwith the conventions discussed
below.
The following conventions apply to numbers:
• All numbers are decimal unless otherwise noted.
• All ethemetaddresses are given in hexadecimal.
Convention
Special type
Red type
UPPERCASE
Meaning
This special type in examples indicates system output or user
input.
Red type
in examples indicates user input.
Uppercase letters
in command lines indicate keywords that
must
be entered. You canenter them in either uppercase or
lowercase.; You can abbreviate command keywords to the
fust three characters or the minimum unique abbreviation.
lowercase italics Lowercase italics in command syntax or examples indicate
variables for which either the user
or the system supplies a
value.
I Key Indicates that you press the specified key.
I CTRUx Indicates that you should hold the CONTROL key down and
press the key specified by the
x. The server displays the key
combination as AX.
/ This indicates related alternative commands oroptions. For
example, SET/DEFINE PORT refers to the SET PORT and!
or DEFINEPORT command(s).

1
Introduction to DECserver 300 Problem
Solving
Problem solving, or troubleshooting, of the DEC server 300unit involves isolating
server problems from port device or network problems.
A problem
can derivefrom afailure in one of thefive networkcomponents shown in
Figure 1-1. Eachnetworkcomponentis broken down into its parts as shown in Fig-
ure 1-2.
In Figure 1-2, hardware devices are represented by solid-line rectangles.
Software is represented by rectangles outlined with dashed-line rectangles.
Someexternalcomponents andparts arecustomer-replaceable,but most parts must
be replaced by a qualified Digital Equipment Corporation service representative.
Figure 1-1: Network Components
PORT DEVICE DECserver 300 ETHERNET
SERVICE
NODE
DECnet
LOAD HOST
NODE
LKG-2890-89
1-1