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Transition Networks Section Vll: FBRM/BFFG Operation
Firmware upgrades, continued
OAM firmware upgrades are done by the local active peer Device to its remote
passive peer Device automatically. This occurs when the active peer Device finds that
its remote peer has a firmware revision different from its own. The active peer Device
sends a bootloader command to its remote peer. When the firmware upgrade on the
remote peer Device is completed, it will perform a “reset” to activate the new
firmware—no user intervention is required. (Active and passive peer relationships are
established during configuration.)
OAM method
What happens
when the
upgrade fails?
The FBRM/BFFG Devices can have a corrupted image for a variety of reasons. If the
image is corrupt, the following will occur: The bootloader checks the CRC to make
sure the image is good; if the check fails, it will re-initiate each method (XMODEM,
TFTP, OAM) in an attempt to accomplish the upgrade. The sequences is a follows:
Stage Description
A. XMODEM will re-initiate if there is no input from the console; it will try
the OAM method.
B.
OAM initiates to locate an active peer on the network to get the upgrade
image; if an active peer is not available, it will try the TFTP method.
C.
TFTP initiates a request to the TFTP server to get the upgrade image for
the Device.
D.
This process continuously loops through these upgrade methods until one
of the methods successfully upgrades the firmware image.
Admin
intervention
To do a firmware upgrade from the console, before the bootloader moves to the next
method, it waits for ‘2’ seconds for user input displaying the following message:
“Moving to XMODEM upgrade, Hit 'ESC’ to skip or ctrl-C
for CLI.”
Bootloader CLI
The “bootloader” has a CLI to configure network setting, such as the TFTP server
address, filename, and the boot method to use for upgrading the firmware.
The CLI can be started by pressing any key within ‘2’ seconds before it starts the
CRC validation, or by pressing the CTRL-C keys when it shows the following
message:
Transfer Failed
Moving to OAM, XMODEM or TFTP upgrade, Hit 'ESC' to skip/
<ctrl-c> for CLI.
Continued on next page
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