
Troubleshooting Network Boot Problems
117341-A Rev. A B-17
Maintaining the Router Software
The BayStack router file system resides on the flash memory card, which is not
user serviceable.
You use Technician Interface commands to maintain the local file system on the
BayStack router flash memory card. See Using Technician Interface Software and
Using Technician Interface Scripts for more information.
When Technician Interface commands require that you specify a volume, always
specify volume 1 for a BayStack router.
Upgrading the Software Image
You can upgrade a BayStack router’s kernel file (krnl_an.exe for the AN/ANH or
krnl_arn.exe for the ARN) using one or both of the following options:
• Use Netboot to start the router.
This option upgrades the image only in the BayStack router’s RAM.
• Use TFTP to transfer the image to the BayStack router’s flash memory card,
then use Local Boot to start the router.
This option upgrades the image in both the BayStack router’s flash memory
card and in RAM.
Caution: Be very careful when you use the format command. This command
erases all files on the local flash memory card, and the BayStack router will not
be able to local-boot an image or configuration file until you replace the files.
You can avoid this situation by partitioning the flash memory card. See Using
Technician Interface Software or Configuring and Managing Routers with Site
Manager.
Caution: If you use TFTP to transfer an upgraded image to a BayStack router
flash memory card, and the file transfer is interrupted (for example, if the
router resets, reboots, or loses power), the BayStack router’s local file system
on the flash memory card becomes corrupted and the router cannot boot
locally until you restore the file system.
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