Specifications

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3.7.1. Kernel upgrade
1. Download the kernel file using TFTP to Arctic. In arctic> prompt, enter the following
command:
tftp 20000 <kernel_filename>
Replace the <kernel_filename> with the actual filename of the kernel file, e.g. linux.501.
If you encounter timeouts in transfer, re-check the cabling and IP settings in Arctic and in
PC.
2. After successful TFTP-transfer, erase the Arctic flash using the following commands:
protect off ff820000 ffffffff
erase ff820000 ffffffff
3. After successful flash erasing, copy the kernel to flash memory using the following
command:
cp.b 20000 ff820000 $(filesize)
Note:
• The $(filesize) is not a placeholder for the actual file size, do
not replace it with the size of the kernel file, instead type exactly as
above.
3.7.2. Filesystem image upgrade
1. After successful kernel update, download root filesystem image to Arctic using the
following TFTP command:
tftp 20000 <filesystem_image_filename>
Replace the <filesystem_image_filename> with the actual filename of the filesystem image
file, e.g. jffs.edgerouter508.
2. After successful TFTP download of filesystem image, copy it to flash using following
command:
cp.b 20000 ff900000 $(filesize)
Note:
• The $(filesize) is not a placeholder for the actual file size, do
not replace it with the size of the kernel file, instead type exactly as
above.
• If you haven’t performed the kernel upgrade, you will have to enter
the following commands prior flashing the filesystem image to the
flash memory:
protect off ff900000 ffffffff
erase ff900000 ffffffff
3. After successful copying, the Arctic can be rebooted.
3.7.3. The generation of SSH keys
After reboot Arctic is upgraded and ready for use, except that the SSH-VPN keys need to be
generated manually.