
Troubleshooting Network Boot Problems
114084 Rev. A A-17
When Technician Interface commands require you to specify a volume, always
specify Volume 1 for an AN/ANH/ARN.
Upgrading the Software Image
You can upgrade an AN/ANH/ARN’s software image (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 router’s RAM.
• Use TFTP to transfer the image to the router’s local file system, and then use
Local Boot to start the router.
This option upgrades the image in both the router’s local file system and in
memory.
Restoring a Local File System
If the local file system becomes corrupted, you must restore it by upgrading the
software image.
If for any reason the router resets, reboots, or loses power while restoring or
compacting its Flash card file system, it automatically Netboots the configuration
file and software image. (You must already have the network set up for Netboot to
succeed.)
Caution: If you use TFTP to transfer an upgraded image to an AN/ANH/ARN
Flash card, and an interruption in the file transfer occurs (for example, if the
router resets, reboots, or loses power), the router’s local file system becomes
corrupted and it cannot boot locally until the file system is restored.
Note: On AN models, if the router reboots while it is writing to or compacting
partitioned Flash memory, the file system becomes corrupted. As a result, the
router will not start after rebooting.
Comentarios a estos manuales