Technical data

218
format disk
save
copy tftp
@xxx.xxx.xxx.xxx:kernel.f2k kernel.f2k
sync
The above assumes that the software presently running from RAM is correctly configured and still functional.
The
save
command re-creates all the configuration files (except the FILTER.DAT file, which you may re-
create manually by typing
save filter
). The
copy
command reinstalls the operational software on the FLASH
file system and
sync
commits all this information to disk.
3. In the event that the software running from RAM is not functional enough to perform those steps, you will
have to boot from the network using a TFTP server, as explained in the section
Software Kernel Upgrades,
page 214
.
If you cannot issue the
format
command as explained in the previous tip, you will have to erase the FLASH
file system from the boot code.
a. Flip configuration switch 6 to the
DOWN
position and reboot the router (by powering down and up
again, for example).
b. At the manual boot menu, enter
5
to select 5.
“Configure boot system”
, and enter the "magical"
number 98. Then, move switch 6 back to its
UP
position.
c. Reboot from the network following the steps described in the Software Upgrade Procedure. You will
notice error messages indicating that the file system is not formatted. Then log in and enter:
format disk
d. Recreate the configuration files either by re-entering the information or by restoring them from a TFTP
server. Re-install the operational software entering the command:
copy [e-mail]:kernel
.f2k kernel.f2k
This assumes that TCP/IP routing is enabled and that an IP address has been assigned to the Ethernet
interface.
Recovering Kernels for Routers with a Reset Button (models 2210)
A router that fails to boot may be an indication that the kernel is corrupted.
In order to use the following recovery steps, you need to have a kernel for the particular router model. If you
installed the DSL Tools and successfully connected to the router, an automatic backup process was started and
saved a copy of the kernel and other files to the PC in a subdirectory under DSL Tools called Sxxxxxx, where
xxxxxx is the serial number of the unit. The file needed for this recovery is called KERNEL.F2K.
Before proceeding with the recovery steps described below, make sure that the router has a good Ethernet
connection to the PC. If a console cable is available, you may want to connect it and start a terminal emulator
session to see the router’s console messages.
Additionally, you may also want to check the LEDs’ blinking patterns (on the front panel of the router). They may
help identify the state of the router.