Alcatel-Lucent 7950 XRS Series, Configuration Manual

Page: 178 / 502

System Initialization
Page 178 7950 SR OS Basic System Configuration Guide
Configuration and Image Loading
When the system executes the
boot.ldr
file, the initialization parameters from the BOF are
processed. Three locations can be configured for the system to search for the files that contains the
runtime image. The locations can be local or remote. The first location searched is the primary
image location. If not found, the secondary image location is searched, and lastly, the tertiary
image location is searched.
If the
BOF
cannot be found or loaded, then the system enters a console message dialog session
prompting the user to enter alternate file locations and file names.
The boot.ldr can be interrupted during the boot sequence by pressing any key on the CPM console
port. The operator must then type sros and press ENTER within 30 seconds or the boot.ldr will
continue trying to boot the system. This key sequence ensures that noise or misconfiguration does
not inadvertently interrupt the boot sequence. If the operator types
sros and presses ENTER
within 30 seconds, they are brought to a console message dialog session prompting the user to
enter file locations and other boot information.
When the runtime image is successfully loaded, control is passed from the bootstrap loader to the
image. The runtime image attempts to locate the configuration file as configured in the BOF. Like
the runtime image, three locations can be configured for the system to search for the configuration
file. The locations can be local or remote. The first location searched is the primary configuration
location. If not found, the secondary configuration location is searched, and lastly, the tertiary
configuration location is searched. The configuration file include chassis, XCM (card), XMA
(mda), and port configurations, as well as system, routing, and service configurations.
Figure 9 displays the boot sequence.