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September 29, 1999
These release notes discuss features, caveats, and open issues for the Cisco 627 asymmetric digital subscriber line (ADSL) Discrete Multitone (DMT) modem as of Release 2.2.0 of the Cisco Broadband Operating System (CBOS). This is the first supported release of the Cisco 627.
For more detailed information about the features in these release notes, refer to the "Related Documentation" section. Information about electronic documentation can be found in the "Cisco Connection Online" section and in the "Documentation CD-ROM" section.
These release notes provide the following information:
CBOS is the common operating system for Cisco customer premises equipment (CPE). The CBOS is modeled after Cisco IOS software and features a similar command syntax and format. This operating system is bundled with the Cisco 627 ADSL DMT Modem, and can also be downloaded from Cisco Connection Online.
CBOS Release 2.2.0 supports the following error log enhancements:
DDD:HH:MM:SSIf the Exec password is null, CBOS Release 2.2.0 refuses Telnet login and displays the message "Connection refused, password not set" or equivalent.
CBOS Release 2.2.0 supports the Trivial File Transfer Protocol (TFTP) client, which is a key feature needed to support the emerging configuration-less CPE architecture. The Cisco 627 can now request configuration files and software loads with the TFTP client support. Previous versions of CBOS supported TFTP server functionality only.
This feature allows you to set a timer for reboot at a specified interval, which prevents you from correcting the configuration locally.
ATM scrambling is now enabled by default on the Cisco 627.
This feature allows you to download a new image file or configuration file to the Cisco 627 through the serial port using the XMODEM protocol. See the "Serial Download" section for detailed instructions.
The CBOS Release 2.2.0 supports the following new commands:
The upgrade process is the same whether you use TFTP or serially download the new image of the CBOS software. After the new file is written to the Flash memory, enter the reboot command from the CBOS command line to reset your system. The new image loads, decompresses two images, and programs the new images to the correct Flash memory locations.
 | Caution Do not reset the system or halt its operation in any way during the upgrade process. Resetting while writing a new image to Flash memory will corrupt Flash memory. |
See the following instructions to use TFTP to download a new software image.
Step 1 Login to the Cisco equipment using the Enable password.
Step 2 Enable TFTP on the Cisco equipment.
set tftp enabled
Step 3 Determine the equipment's IP address.
show int atm0
Step 4 From the DOS window or TFTP client, transfer the image to the CPE. In a DOS window, enter:
tftp -i ip address of CPE put filename
Step 5 To ensure that file is downloaded correctly, enter:
show errors
You should see an "Image downloaded successfully" message.
Step 6 Reboot the CPE.
To serially download the image, enter the following settings through a serial console connected to your system:
Step 1 To turn debug monitor on, enter:
debug monitor on
Step 2 To save your changes, enter:
write
Step 3 To reboot the device, enter:
reboot
After the modem reboots, press Enter twice. The prompt should change to =>.
Step 4 To start serial download, enter:
df 10008000
Step 5 When the download is complete, the following message appears:
Transferred xxxxxxxx bytes
Record the number of bytes transferred.
Step 6 To erase sector 0, enter:
es 0
Step 7 To erase sector 1, enter:
es 1
Step 8 To erase sector 2, enter:
es 2
Step 9 To erase sector 3, enter:
es 3
Step 10 Enter:
pb 10008000 fef00000 xxxxxxxx
where xxxxxxxx is the value recorded in Step 5.
Step 11 To turn debug monitor off, enter:
m0
Step 12 To reboot, enter:
rb
The following list describes known issues and functionality details:
nscfg.xxx, where xxx can be any extension.
Table 1 lists open caveats for the Cisco 627 as of CBOS Release 2.2.0.
| Bug Number | Description |
|---|---|
CSCdp04764 | Prompt returns when Enter is pressed during TFTP client download. Impact: Could potentially cause a problem if the user reboots the CPE while TFTP download is still in process, or if other commands are entered that could interrupt the process. Workaround: Do not touch the keyboard while TFTP transfer is in progress. Wait until TFTP completes before entering any other commands. |
This section addresses errors in the Cisco 627 ADSL DMT Modem User Guide and information that was not available when the user guide was printed.
Use these release notes in conjunction with the following user documentation:
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You can access CCO in the following ways:
For a copy of CCO's Frequently Asked Questions (FAQ), contact cco-help@cisco.com. For additional information, contact cco-team@cisco.com.
Cisco documentation and additional literature are available in a CD-ROM package, which ships with your product. The Documentation CD-ROM, a member of the Cisco Connection Family, is updated monthly. Therefore, it might be more current than printed documentation. To order additional copies of the Documentation CD-ROM, contact your local sales representative or call customer service. The CD-ROM package is available as a single package or as an annual subscription. You can also access Cisco documentation on the World Wide Web at http://www.cisco.com, http://www-china.cisco.com, or http://www-europe.cisco.com.
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Posted: Fri Sep 24 10:53:36 PDT 1999
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