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Chapter 4 Configuring Switch Software 4-13
4.6.1.5 Start Diagnostic Application
This option boots the Broadcom diag shell, currently SDK version 5.4.1. This
environment is provided as is, with no support. Several commands provided in this
shell are not supported and will not work. This shell is provided mainly for debug,
testing, and diagnostics purposes. This shell has many low-level tests, and low-level
register access. It can be used to check the integrity of particular boards. Help is
provided in the shell with ?? and commands followed by a single question mark.
Some commands of interest are TestList and TestRun.
4.7 Primary and Backup Flash
The switch features hardware flash redundancy. If the switch fails to boot from the
primary flash for any reason, the onboard IPMC will reset the board and attempt to
boot out of the backup flash. No user interaction is required.
The switch backup flash comes preprogrammed with default settings. You can
change what is loaded on the backup flash by using the Copy Primary Flash to
Backup Flash command from the utility menu.
4.8 Dual Firmware Images
The switch supports dual firmware images of the Base and Fabric software. While
this feature does not provide high availability (the hardware redundant flash
provides that), it does provide a way to store two copies of the firmware on the
switch. This allows you to switch between firmware, as needed.
4.8.1 Booting the Non-Active Image
Which image is active can be changed several ways.
From the boot menu, the Activate Backup Image option can be used.
From within FASTPATH the boot system command in combination with the
update bootcode commands can be used.