ELSA Cable Bedienungsanleitung
Manual
M
ELSA MicroLink
TM
Cable
© 1999 ELSA AG, Aachen (Germany)
While the information in this manual has been compiled with great care, it may not be deemed an
assurance of product characteristics. ELSA shall be liable only to the degree specified in the terms of
sale and delivery.
Thereproductionanddistributionofthedocumentationandsoftwaresuppliedwiththisproductandthe
use of its contents is subject to written authorization from ELSA. We reserve the right to make any
alterations that arise as the result of technical development.
ELSAis DINEN ISO9001 certified.The accreditedTÜV CERTcertification authorityhas confirmedELSA
conformity to the worldwide ISO 9001 standard in certificate number 09 100 5069, issued on June 15,
1998.
Trademarks
Windows®, Windows NT®and Microsoft®are registered trademarks of Microsoft, Corp.
Allothernamesmentioned may betrademarksor registered trademarksoftheirrespective owners.The
ELSA logo is a registered trademark of ELSA AG.
Subject to change without notice. No liability for technical errors or omissions.
www.elsa.com
Aachen, October 1999
ELSA AG
Sonnenweg 11
52070 Aachen
Germany
ELSA, Inc.
2231 Calle De Luna
Santa Clara, CA 95054
USA
No. 20840/1099
Preface
Thank you for placing your trust in this ELSA product.
Withthe
ELSAMicroLinkCable
,youhavechosenamodemthatwillopenthedoortothe
Internet for you with unparalleled speeds and remain online permanently.
Thehighestqualitystandardsinmanufacturingandstringentqualitycontrolarethebasis
for high product standards and consistent product quality.
This documentation contains the following chapters:
KIntroducing the
ELSA MicroLink Cable
KInstallation and configuration
KConfiguration modes
KOperating modes and functions
KTechnical basics
KTechnical reference
KAppendix
Ouronlineservices(Internetserverwww.elsa.com)are availabletoyouaroundtheclock
shouldyouhave anyqueries regardingthe topicsdiscussedin thismanual orrequire any
further support. In the Support file section under 'Know-How', you can find answers to
frequently asked questions (FAQs). The KnowledgeBase also contains a large pool of
information. Current drivers, firmware, tools and manuals can be downloaded at any
time.
The KnowledgeBase can also be found on the CD. Just open the file
\Misc\Support\MISC\ELSASIDE\index.htm.
Content
ELSA Cable Modem
V
English
Content
Introducing the
ELSA MicroLink Cable
.....................................................................1
The
ELSA MicroLink Cable
takes the stage............................................................ 1
What does the unit look like?............................................................................ 1
Node or hub?...................................................................................................... 3
The highlights of the
ELSA MicroLink Cable
.......................................................... 4
Fast Internet....................................................................................................... 4
Internet at all times—always online ................................................................ 5
More than just Internet...................................................................................... 5
CE conformity and FCC radiation standard............................................................. 7
Installation and Configuration ....................................................................................9
First Steps............................................................................................................. 10
Quick Start: Quick configurations......................................................................... 11
Preparations..................................................................................................... 11
Configuration as a bridge ................................................................................ 11
Configuration as a router................................................................................. 13
Set up the workstation computers (Windows 95 or 98)....................................... 15
Configuration modes ..................................................................................................17
The user-friendly method: inband......................................................................... 17
Requirements for inband configuration........................................................... 17
Alternatively: addresses can be managed by the DHCP server...................... 17
Starting inband configuration using
ELSA LANconfig
..................................... 18
Start up inband configuration using telnet...................................................... 18
Configuration commands ..................................................................................... 19
What's happening on the line?............................................................................. 21
Trace Outputs................................................................................................... 21
New firmware with FirmSafe............................................................................... 22
This is how FirmSafe works............................................................................. 22
How to load new software.............................................................................. 23
Configuration using SNMP.............................................................................. 24
General............................................................................................................. 24
Accessing tables and parameters using SNMP.............................................. 25
The Management Information Base (MIB)...................................................... 27
Operating modes and functions ...............................................................................29
Security for your configuration............................................................................. 29
Password protection........................................................................................ 29
Login barring.................................................................................................... 29
Access control via TCP/IP................................................................................ 30
Content
ELSA Cable Modem
VI
English
Security for your LAN............................................................................................ 30
Encryption ........................................................................................................ 31
TCP/IP packet filters ........................................................................................ 31
The hiding place—IP masquerading (NAT, PAT) ............................................ 31
IP routing............................................................................................................... 32
The IP routing table.......................................................................................... 32
Dynamic routing with IP RIP ............................................................................ 34
Local routing .................................................................................................... 35
IP masquerading (NAT, PAT)............................................................................ 36
DNS forwarding............................................................................................... 38
Bridging............................................................................................................ 39
Automatic address administration with DHCP..................................................... 40
The DHCP client............................................................................................... 41
The DHCP server.............................................................................................. 41
DHCP – 'on', 'off' or 'auto'?.............................................................................. 42
How are the addresses assigned?................................................................... 42
Technical basics .........................................................................................................47
Cable modem technology..................................................................................... 47
Standards......................................................................................................... 47
Access.............................................................................................................. 47
Registration in the cable network ................................................................... 48
Network technology.............................................................................................. 50
The network and its components .................................................................... 50
Connection modes ........................................................................................... 50
Kinds of networks............................................................................................ 52
IP addressing......................................................................................................... 52
IP routing and hierarchical IP addressing........................................................ 55
Expansion through local networks................................................................... 57
Appendix .......................................................................................................................63
Technical data ...................................................................................................... 63
Warranty conditions............................................................................................. 65
Declaration of conformity..................................................................................... 67
Description of the menu options ..............................................................................73
Status.................................................................................................................... 75
Status/Operating-time..................................................................................... 76
Status/Current-time......................................................................................... 76
Status/cable-statistics..................................................................................... 76
Status/LAN-statistics ...................................................................................... 77
Status/bridge statistics ................................................................................... 78
Status/TCP-IP-statistics................................................................................... 79
Content
ELSA Cable Modem
VII
English
Status/IP-router-statistics ............................................................................... 83
Status/config statistics.................................................................................... 85
Status/Queue-statistics................................................................................... 85
Status/MCNS-statistics................................................................................... 87
Status/Init-status............................................................................................. 87
Status/DHCP-client-statistics.......................................................................... 88
Setup..................................................................................................................... 88
Setup/cable-module ........................................................................................ 89
Setup/LAN-module.......................................................................................... 89
Setup/bridge-module....................................................................................... 90
Setup/TCP-IP-module....................................................................................... 91
Setup/IP-router-module................................................................................... 94
Setup/SNMP-module..................................................................................... 101
Setup/DHCP-server-module........................................................................... 101
Setup/Config-module..................................................................................... 103
Firmware............................................................................................................. 104
Other................................................................................................................... 106
Content
ELSA Cable Modem
VIII
English
Introducing the ELSA MicroLink Cable
ELSA MicroLink Cable
1
Introducing the
ELSA MicroLink Cable
Internetaccessisthemainapplicationforthe
ELSAMicroLinkCable
. Theoperatorofthe
cablenetworktowhichyouhaveconnectedyourmodemmayofferadditionalservicesor
regional information.
This chapter describes the display elements and connections of the modem, accessing
the Internet, and the characteristics and techniques that ensure fast, secure data
exchange.
Thepreciseuseofthe
ELSAMicroLinkCable
'sfeatureswillbeexplainedinthefollowing
sections and with the aid of the examples in the 'Workshop'.
The term 'router', as used in the remainder of the manual, refers to the router functions
of our ELSA MicroLink Cable
.
The
ELSA MicroLink Cable
takes the stage
This section introduces the unit's hardware. It covers the unit's display elements and
connection options.
What does the unit look like?
We would first like to familiarize you with the device.
You will find a number of LEDs as display elements on the front panel.
Introducing the ELSA MicroLink Cable
ELSA MicroLink Cable
2
ON
This LED flashes once when the power supply is switched on. After the self-test, either
an error is output by a flashing light code or the device starts and the LED remains lit.
Standby
ThisLEDshowsthattheunitisinstand-bymode. The
ELSAMicroLinkCable
isregistered
withthecablenetworkproviderinthisstate,butthereisnoactiveconnectiontothelocal
network. In other words, no data can be exchanged between the Internet and the LAN
in this state.
The
ELSA MicroLink Cable
can be switched to this mode by configuring the function of
the power switch correspondingly and then actuating this switch on the rear of the unit.
Cable-Tx, -Rx,
-Sync, Reg’d
These LEDs display the status of the interface to the cable network:
Blink codes
TheSyncandReg’dLEDscandisplaythevariousphasesofthecablemodemregistration
through combined blink codes, thus offering configuration troubleshooting information.
The meanings of the specific blink codes:
Off Unit switched off, power supply plugged in
red 1 x short Boot procedure (test and load) started
red flashing Display of a boot error (flashing light code)
red Device ready for use
Cable-Tx yellow Data packet sent from the device to the Internet
Cable-Rx green Data packet received from the Internet
Cable-Sync green The device has found a channel on which it can communicate with the
cable network operator's headend.
Cable-Reg’d green The registration and all required negotiations between the unit and the
headendhavebeencompletedand the registration confirmed by the hea-
dend. The unit is ready to exchange data with the Internet in this state.
SYNC REG'd What has been achieved so
far? What is the modem trying to do?
off off channelsearch with 64/256QAM chan-
nel
1 pulse off QAM lock FEC lock
2 pulse off FEC lock TRC lock
on off TRC lock initial ranging
on 1 pulse initial ranging DHCP
on 2 pulse DHCP ToD
on 3 pulse ToD Configuration file
on 4 pulse Configuration file Registration
on on Registration
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