Nortel CM 100 Instruction Manual

305471-B Rev 02
July 1999
Version 2.1
Release Notes for the
CM 100 V2.1

Radio Frequency Interference Statement
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable pro-
tection against harmful interference when the equipment is operated in a commercial environment.
This equipment generates, uses, and can radiate radio frequency energy and, if not installed and
used in accordance with the instruction manual, may cause harmful interference to radio communi-
cations. Operation of this equipment in a residential area is likely to cause harmful interference in
which cause the user will be required to correct the interference at his own expense.
This digital apparatus does not exceed the Class B limits for radio noise emissions from digital
apparatus set out in the Radio Interference Regulations of the Canadian Department of Communi-
cations
Le présent appareil numérique n’émet pas de bruits radioélectriques dépassant les limites applica-
bles aux appareils numériques de classe B prèscrite dans le Règlement sur le brouillage
radioélectrique édict par le Ministère des Communications du Canada.
To maintain compliance with FCC radio frequency emission limits the use of quadshield, RG-6/U
type CATV cable is required for connection to the CATV system. Any changes or modifications may
void the user's authority to operate this equipment.
EN 55 022 Statement
This is to certify that Bay Networks, Inc. CM is shielded against the generation of radio interfer-
ence in accordance with the application of Council Directive 89/336/EEC, Article 4a. Conformity is
declared by the application of EN 55 022 Class B (CISPR 22).
Voluntary Control Council for Interference (VCCI) Statement
This is a Class B product based on the standard of the Voluntary Control Council for Interference
from Information Technology Equipment (VCCI). If this is used near a radio or television receiver
in a domestic environment, it may cause radio interference. Install and use the equipment accord-
ing to the instruction manual.
Règlement sur le brouillage radioélectrique du ministère des Communications
Cet appareil numérique CM respecte les limites de bruits radioélectriques visant les appareils
numériques de Classe B prescrites dans le Règlement sur le brouillage radioélectrique du Min-
istère des Communications du Canada.
EC Declaration of Conformity
This product conforms to the provisions of Council Directive 89/336/EEC and 73/23/EEC.
B

305471-B Rev 02 iii
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CM 100 Release Notes
iv 305471-B Rev 02
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IF NORTEL NETWORKS HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. IN NO EVENT

CM 100 Release Notes
305471-B Rev 02 v
SHALL THE LIABILITY OF NORTEL NETWORKS RELATING TO THE SOFTWARE OR THIS AGREEMENT
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CM 100 Release Notes
vi 305471-B Rev 02

Table of Contents
305471-B Rev 02 vii
About This Document
Before You Begin .............................................................................................................. ix
Customer Service ..............................................................................................................x
How to Get Help ................................................................................................................x
Conventions Used in This Document ............................................................................... xi
Acronyms ..........................................................................................................................xii
Technical Publications ......................................................................................................xii
Associated Documents ....................................................................................................xiii
Release Notes
Product Description ........................................................................................................1-1
Software Requirements ..................................................................................................1-1
Hardware Requirements .................................................................................................1-1
Restrictions ..............................................................................................................1-2
Upgrade Recommendations ...........................................................................................1-2
Upgrade Procedure Summary .................................................................................1-3
Step #1: Verify Contents of Upgrade Package ..................................................1-3
Step #2: Configure TFTP File Server ................................................................1-3
Step #3: Initiate Upgrade Process .....................................................................1-4
New Features .................................................................................................................1-5
Software Upgrade Integrity Check ...........................................................................1-5
Log Messages ..........................................................................................................1-5
Problems Fixed ...............................................................................................................1-5

CM 100 Release Notes
viii 305471-B Rev 02

305471-B Rev 02 ix
About This Document
Product: Software V2.1
Date: July 1999
Distribution: External
Software Version: V2.1
BEFORE YOU BEGIN
Before using this document, you should be familiar with RF measuring
equipment, data over cable TV system installation procedures, the Cable
Modem Provisioning Server, and general RF cable plant operating
methods. You should also be familiar with an SNMP manager.

Release Notes for the CM 100
x305471-B Rev 02
CUSTOMER SERVICE
You can purchase a support contract from your Nortel Networks distributor
or authorized reseller, or directly from Nortel Networks Services. For
information about, or to purchase a Nortel Networks service contract,
either call your local Nortel Networks field sales office or one of the fol-
lowing numbers:
Information about customer service is also available on the World Wide
Web at support.baynetworks.com.
HOW TO GET HELP
If you purchased a service contract for your Nortel Networks product from
a distributor or authorized reseller, contact the technical support staff for
that distributor or reseller for assistance.
If you purchased a Nortel Networks service program, call one of the fol-
lowing Nortel Networks Technical Solutions Centers:
Support Center Telephone
Number Fax Number Email
Andover, MA 800-2LANWAN*
(978-916-3700) 978-682-3200 Attn: Support
Contracts
[e-mail]
Valbonne,
France 33-4-92-96-69-68 33-4-92-96-69-98 baypoint@baynetworks. com

About This Document
305471-B Rev 02 xi
* For cable modems and cable modem family products, use Express Rout-
ing Code 174.
CONVENTIONS USED IN THIS DOCUMENT
Italic text Indicates text that you need to enter, command names,
and buttons in menu paths.
Example: Enter wfsm &
Example: Use the dinfo
command.
screen text Indicates data that appears on the screen.
Example: Set cable-level#
Region Telephone
number Fax number Email
United States
and Canada 800-2LANWAN* (978-916-3700) 978-682-3200 Attn: Support
Contracts
[e-mail]
Europe 33-4-92-96-69-68 33-4-92-96-69-98

Release Notes for the CM 100
xii 305471-B Rev 02
ACRONYMS
CM Cable Modem
dB Decibel
DOCSIS Data Over Cable Service Interface Specification
IP Internet Protocol
LLC Logical Link Control
MAC Media Access Control
MIB Management Information Base
SNMP Simple Network Management Protocol
TFTP Trivial File Transfer Protocol
TECHNICAL PUBLICATIONS
You can now print technical manuals and release notes free, directly from
the Internet. Go to support.baynetworks.com/library. At the bottom of the
screen that comes up, select Versalar products and select the product for
which you desire information. Using Adobe Acrobat Reader, you can open
the manuals and release notes, search for the sections you need, and print
them on most standard printers. You can download Acrobat Reader free
from the Adobe Systems Web site, www.adobe.com.
Documentation sets and CDs are available through your local Bay
Networks sales office or account representative.

About This Document
305471-B Rev 02 xiii
ASSOCIATED DOCUMENTS
Refer to the following documents for further information:
•Getting Started with the CM 100 is directed at the end user, this
document provides operating and installation instructions for the CM
100 Cable Modem.
•Installing the CMTS 1000 provides installation instructions for the
CMTS 1000 Cable Modem Termination System and its supporting
provisioning server and SNMP management software.
•Installing CMTS 1000 Upstream Receivers describes how to install
CMTS Upstream Receivers and how to verify a successful installation.
•Managing and Operating the CMTS 1000 provides operating
instructions for the CMTS 1000’s provisioning server, its command
line interface (CLI) and its Management Information Base (MIB)
SNMP agent.
•Release Notes for the CMTS 1000 provides additional information not
available at the time of the CMTS 1000 Installation Manual’s printing.
•Release Notes for the DOCSIS LCn Provisioning Server provides
additional information not available at the time of the Managing and
Operating the CMTS 1000 printing.

Release Notes for the CM 100
xiv 305471-B Rev 02

305471-B Rev 02 1-1
Release Notes for the
CM 100 V2.1
PRODUCT DESCRIPTION
The Cable Modem 100 provides full Data Link and Network Layer
bridging functionality and supports up to 16 users for scalable network
access. It complies with Data Over Cable Service Interface Specifications
(DOCSIS) standards, which define standards for networking equipment
that will be attached to the cable plant. The Cable Modem 100 delivers the
data forwarding and filtering capabilities required by the most demanding
applications.
SOFTWARE REQUIREMENTS
DOCSIS LCn Provisioning Server by Nortel Networks, Broadband
Technology Division, or an equivalent DOCSIS-compliant provisioning
system.
HARDWARE REQUIREMENTS
Ethernet cable (maximum length of 10 feet with RJ 45 connector).

Release Notes for the CM 100
1-2 305471-B Rev 02
Restrictions
The equipment has an international auto-ranging internal power supply
which allows it to be powered from any 100–120, 220–240 VAC (50-60
Hz) source.
UPGRADE RECOMMENDATIONS
• Read software upgrade “readme” file for latest released software
upgrade information.
• Use a standard Simple Network Management Protocol (SNMP) manage-
ment station such as CastleRock’s SNMPc™.
• Have the network manager and TFTP file server residing on the same
PC.
• Ensure the person that is performing the software upgrade is proficient in
the operation and configuration of DOCSIS Cable Modems and Cable
Modem Termination Systems.
Traffic should be minimal on the network during the upgrade process
(including any automatic network management polling such as SNMPc™
Trend Watch and Auto Discover). After the upgrade has started, the
process takes approximately one minute per cable modem or cable modem
termination system. Network users should be notified that they will
experience interruptions during the upgrade process.

Release Notes for the CM 100
305471-B Rev 02 1-3
Upgrade Procedure Summary
There are six basic steps to perform an upgrade to a CM 100 using a
standard SNMP manager.
1. Verify contents of upgrade package.
2. Configure TFTP file server.
3. Initiate upgrade process.
4. Upgrade and compile the latest cable modem SNMP MIB.
5. Verify upgrade completed successfully.
Note: If unit fails to respond after upgrade procedure, remove the unit from
the cable system before performing any troubleshooting procedures,
especially resetting the unit to factory defaults.
Step #1: Verify Contents of Upgrade Package
The distribution method for the CM 100 upgrade is via a Nortel
Network-maintained FTP server and web site. Upgrade software directories
will include separate software files for the CM 100 and the CMTS 1000.
All pertinent SNMP MIB files are also included.
Step #2: Configure TFTP File Server
Perform the following procedure to setup the TFTP file server and install
the upgrade software.
Set the TFTP server’s default or public directory to the directory where you
will be copying the upgrade software.
Copy the CM 100 and CMTS 1000 upgrade software files to the TFTP
server’s default directory. We recommend using the data directory that you
use to save and provision the cable modem’s configuration and MD5 files.

Release Notes for the CM 100
1-4 305471-B Rev 02
Step #3: Initiate Upgrade Process
Software Upgrade via SNMP
Use the following procedure to upgrade a CM 100 using an SNMP
manager.
1. Select cable modem device to be upgraded.
2. Select the DocsDev MIB Object ID.
3. Select the Docs_Software MIB Object ID. The SNMP manager
displays the softwareInfo Table.
4. Set the Server (docsDevSwServer) IP Address to the IP Address of the
TFTP server.
5. Set the Filename (docsDevSWFilename) to the filename of the upgrade
software that you copied into the TFTP server’s default directory. Enter
only the filename. Do not enter the full path to the TFTP server’s public
directory.
Caution: All parameters must be set exactly as stated. Verify that all
previous steps are complete and accurate, especially file names and IP
Addresses. Verify that the TFTP server is ON and the loadable files are in
the TFTP server’s public directory.
6. Initiate the upgrade process by setting the AdminStatus MIB
(docsDevSWAdminStatus) to upgradeFromMgt.
You can monitor the process if your TFTP server has a display window, or
returns status information to you. The process takes about one minute.
The modem will reset itself during this process. To verify that the software
loaded correctly, examine the SysDescr MIB object, which shows the
software revision.

Release Notes for the CM 100
305471-B Rev 02 1-5
NEW FEATURES
Software Upgrade Integrity Check
The Cycle Redundancy Check is being verified during software upgrade, in
addition to being checked on system start up.
Log Messages
If a CM declines a DHCP offer, it now logs the reason.
PROBLEMS FIXED
The following problems were discovered in Release 2.0 of the CMTS and
corrected.
1. Multiple DHCP NAK responses could cause modems to reset.
2. The CM reset when the provisioning file was greater than 8192 bytes.
3. CM requests now include DHCP client ID option and the Log Server
option.
4. The CM reset when it received two DHCP ACK responses.
5. DHCP Renew Request now includes the Client ID option.
6. The CM no longer registers with the CMTS when a change in the
upstream and/or downstream is directed by the provisioning file.
7. An NMAccess table that contains only notInService entries incorrectly
caused the CM to be in a restricted access state.
8. When ARPing for a duplicate IP address, the CM may ignore an ARP
response.

Release Notes for the CM 100
1-6 305471-B Rev 02