Boot Option Files
7210 SAS M, X Basic System Configuration Guide Page 97
Configuration and Image Loading
The bootstrap image processes the initialization parameters from the BOF. The bootstrap image 
attempts to locate the configuration file as configured in the BOF. Up to 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. If the 
configuration file is in a remote location, the bootstrap process saves it on the flash as cf1:/
default.cfg. Users must not delete this file or create a file with this name. The configuration file 
includes chassis, IOM, MDA, and port configurations, as well as system, routing, and service 
configurations. Like the configuration file, 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. Figure 3, Figure 4, and Figure 5 
describe the bootstrap process.
Figure 3: Bootstrap Process - System Initialization - Part II-A
Auto Mode
Manual Mode
Yes 
Wait for “wait” seconds 
for user key input
M
Booting for first-time 
or booting after reset-
to-factory default ?
A
Yes 
CLI User 
connected?
No 
No 
R
Restart
“wait” is 
configurable in BOF
Read BOF file for IP 
address, static route.
Boot up
Configure IP on uplink port
Config file 
download
success ?
Yes 
Image download
success?
No 
bootstrap-updated 
flag set and 
completed three
attempts
Yes 
No 
No 
R
Restart
Download Persistence File if 
“persist” is ON in BOF
Check for Primary/ 
Secondary/Tertiary 
config
Yes 
T
TIMOS 
Boot-up
Check for 
Primary/Secondar
y/ Tertiary Image
B
If booting after reset-to-
factory-default, reset bof
Set flag to load 
golden bootstrap, 
and Reboot
If booting after reset-to-
factory-default, reset bof