Cisco Headend Digital Broadband Delivery System Guide De Montage
Appendix B
Load Multiple Versions of MQAM Code
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Loading Multiple Versions of MQAM Code
Note: If you need to determine which config files are being used by each MQAM,
refer to Checking for Multiple Config Files (on page 13) for details. For this
procedure, we will assume that mqam.config is the current configuration file.
1 Go to the /tftpboot directory on the DNCS and rename the current mqam.config
1 Go to the /tftpboot directory on the DNCS and rename the current mqam.config
file as mqam.current.
2 Install the new version of MQAM software that you intend to use using
Install
MQAM Software onto the DNCS (on page 17).
3 From the /tftpboot directory on the DNCS, rename the new mqam.config file as
mqam.new.
4 From the /tftpboot directory on the DNCS, rename the original backup file (for
example, rename mqam.current to mqam.config).
5 From the QAM List window on the DNCS, open the entry for the MQAM that
should download the new code.
6 Click the Advanced Parameters tab, and change the configuration file name from
mqam.config to mqam.new.
7 Click Apply.
8 From the QAM List window on the DNCS, reset the MQAM to which you want
8 From the QAM List window on the DNCS, reset the MQAM to which you want
to download the new code.
9 Repeat steps 6 through 8 for each MQAM to which you want to download the
new code.
10 When you are ready to load code to all of your MQAMs, perform one of the
following approaches:
Preferred Approach
a Go to the /tftpboot directory and rename mqam.new as mqam.config.
b From the QAM List window on the DNCS, reset all the MQAMs that are
b From the QAM List window on the DNCS, reset all the MQAMs that are
using the mqam.config file.
c From the QAM List window on the DNCS, change the configuration file
value for all MQAMs that currently use mqam.new to mqam.config. These
units do not need to be reset.
Alternative Approach
a From the QAM List window, change the configuration file value for all
modulators using mqam.config to use mqam.new.
b Reset the changed MQAMs.
Note: Units that were already using mqam.new as their configuration file do
not need to be reset.