Cisco Headend Digital Broadband Delivery System
Chapter 2 Upgrading QAM Modulator Software
12
4003389 Rev B
Verify the Current QAM Software Version on the
DNCS
DNCS
Introduction
Before attempting to upgrade to QAM software version 2.4, verify the QAM
software version currently installed on your DNCS. This section describes how to
verify the QAM software version currently installed on your DNCS.
software version currently installed on your DNCS. This section describes how to
verify the QAM software version currently installed on your DNCS.
Checking the Configuration File
On occasion, for testing purposes, the configuration file for a test device or a set of
test devices is changed to a non-standard value (for example qam226.config instead
of qam.config). If your site has been involved in this type of testing (and you are
now ready to use the released code again), you should update the configuration
(config) file setting for your test units to reflect the default values.
test devices is changed to a non-standard value (for example qam226.config instead
of qam.config). If your site has been involved in this type of testing (and you are
now ready to use the released code again), you should update the configuration
(config) file setting for your test units to reflect the default values.
Note: The default value for the CAQAM the file is: /tftpboot/qam.config.
Failure to correct the configuration of a unit from using a unique configuration to
using the default configuration will result in the unit remaining in the uniquely-
specified configuration. Specifically, it will not load the new code and it will
continue to load test code specified in the unique configuration file.
using the default configuration will result in the unit remaining in the uniquely-
specified configuration. Specifically, it will not load the new code and it will
continue to load test code specified in the unique configuration file.
In extremely rare cases, the configuration file may have been specified in or may
need to be specified in the /etc/bootptab file. In the event that a headend device fails
to load the code you intended it to receive, you should check to see if a unique file
was specified either through the DNCS GUI or in the /etc/bootptab file before
contacting Cisco Services for assistance.
need to be specified in the /etc/bootptab file. In the event that a headend device fails
to load the code you intended it to receive, you should check to see if a unique file
was specified either through the DNCS GUI or in the /etc/bootptab file before
contacting Cisco Services for assistance.
Verifying the Current QAM Software Version on the DNCS
1 Open an xterm window on the DNCS.
2 Type cd /tftpboot and press Enter. The tftpboot directory becomes the working
2 Type cd /tftpboot and press Enter. The tftpboot directory becomes the working
directory.
3 Type grep qam_app qam.config and press Enter. The system displays a result
similar to the following:
ApplCodePath - caqam_app226.bin
Note: The preceding result indicates that QAM software version 2.2.6 is installed
on the DNCS.
Note: The preceding result indicates that QAM software version 2.2.6 is installed
on the DNCS.