Cisco Headend Digital Broadband Delivery System Guia Da Instalação
Appendix C
Roll Back to the Previous Version of GQAM Software
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4022900 Rev C
Restore the Previous Version of GQAM Software
Introduction
Contact Cisco Services if you notice that the system is reacting adversely after
installing or upgrading the GQAM software. If Cisco Services recommends restoring
the previous GQAM software version, use the instructions in this section to assist
you.
CAUTION:
Contact Cisco Services at 1-800-283-2636 before attempting to restore the
Contact Cisco Services at 1-800-283-2636 before attempting to restore the
previous GQAM software version.
Note: To restore the previous GQAM executable files, restore the configuration
backup file that you saved in Backing Up the Current GQAM Configuration File
(on page 23).
1 Open an xterm window on the DNCS and log on as the root user. The root
1 Open an xterm window on the DNCS and log on as the root user. The root
prompt appears.
2 Type cd /tftpboot and press Enter. The root prompt appears.
3 Type pwd and press Enter. The text /tftpboot appears at the prompt. This text
3 Type pwd and press Enter. The text /tftpboot appears at the prompt. This text
indicates you are in the correct directory.
4 Type cp –p gqam.config gqam.config.yyy and press Enter. The configuration
file named gqam.config, which contains GQAM software version 4.2.1
configuration settings, is saved to a file named gqam.config.yyy.
Note: The yyy represents the GQAM software version number you just installed.
Note: The yyy represents the GQAM software version number you just installed.
5 Type cp –p gqam.config.old gqam.config and press Enter. The configuration file
named gqam.config.old, which contains the previous list of GQAM configuration
files, is copied to a configuration file named gqam.config.
6 Type ls -l and press Enter. A list of files displays. The files gqam.config.old,
gqam.config, and gqam.config.bakyyy appear in the list.
Note: The "l" used in ls and -l is a lowercase letter L.
Note: The "l" used in ls and -l is a lowercase letter L.
7 Confirm that the date and size of gqam.config matches those of
gqam.config.old.
8 Type exit and press Enter.
9 Download the previous version of software to GQAMs by rebooting the
9 Download the previous version of software to GQAMs by rebooting the
modulators. For detailed procedures, go to Download Software to the GQAM
Modulators (on page 29).