Understand The Boot Process - Cisco GoQAM Installation And Operation Manual

Chapter 5 Operating the RF Modulator

Understand the Boot Process

This section describes the boot process and lists examples of the screens that appear
during a normal boot process. The Bootstrap (BOOTP) protocol is used to initialize
and to acquire the following configuration information:
IP address

Address mask

Location of default gateway

Addresses of important servers

Name and location of software download file(s) from the network BOOTP server

Note: The GoQAM downloads software using Trivial File Transfer Protocol (TFTP),
which is a simplified version of FTP.
See Change the Boot Mode (on page 81) for a description of the boot modes available
and instructions for changing the boot mode.
See Troubleshooting Boot Screen Error Messages (on page 143) for troubleshooting
booting conditions.
1 The GoQAM sends a BOOTP request to the DNCS.
2 The DNCS responds to the BOOTP request, sending the IP address for the
GoQAM.
The GoQAM sends a TFTP request for the configuration file.
3
Note: The configuration file (goqam.config) contains environment variables,
download files, and server addresses.
4 The DNCS sends the TFTP goqam.config file.
If the files in the goqam.config file are different from those stored in the GoQAM,
5
then the GoQAM requests the download files, which consist of the following:

Boot code for Host, NP1, NP2, and NP3

Application code for Host, NP1, NP2, and NP3

RF module code for RF Modules 1, 2, 3, and 4
Note: The messages that appear on the front panel of the GoQAM during the
boot process are described in Initial Boot Screens and Code Download Screens.
The following illustrations show examples of the initial boot screens.
Note: Actual screen settings may differ from the examples presented in this guide.
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