Handy to know:-
switch console (hidden command, grrrr to Cisco)
Bug Id : CSCds38294
Headline MSFC cannot be accesed via switch console or session commands
Product cat6000 Model f6k-msfc
Componentsup-msfcDuplicate of
Severity 2 Status C
Version Found 12.12E Fixed-in Version
Release Notes
In certain rare instances while performing disaster recovery, the cat6000
Supervisor
Engine is not able to see the MSFC module installed on it. The "show module"
will
not show the module 15 or 16, even though it is physically present. The
"session 15"
or "session 16" command returns an error stating that "module # not
installed".
"reset 15" will return the same message.
There are a few disaster recovery methods to deal with this situation:
(i) The first method is to try the "switch console" command, which actually
switches
the console port over to the MSFC. In most cases you will find the MSFC
sitting in
"rommonitor" mode. From the rommon prompt, you can invoke the standard
disaster recover
procedure i.e. type "boot" to boot off any existing bootable files in
bootflash,
or do an x-modem to download an msfc-boot image. In some cases, this will
fail
and you will see the console hang at "connecting to router" message. At
this point,
you should try entering the appropriate break sequence e.g. ctrl-break, and
then you should be able to
break in to the rommonitor mode. In the extreme cases, the break sequence
will not work
and you will either drop back to the switch prompt or get stuck in the
"connecting
to router" message".
(ii) If the methods described in (i) fail, the last option is to try and
use the physical
console port on the MSFC card and connect to it using a Straight-Through
cable.
If you are able to acces the command line from here, you can invoke the
standard disaster recovery procedure. In extreme cases
even this will fail. Refer to (iii) for the last technique in this
situation.
(iii) In this extreme situation, and having tried all of the techniques
described above, remove the Supervisor Engine
from the chassis and then remove the Bootflash Simm on the MSFC card.
Reinsert the Bootflash Simm and
make sure it is seated propery in the simm slot. Put the Supervisor back in
the chassis
and this time the MSFC should get recognized by the switch upon reload.
(Try the "switch console" command just in case the
MSFC comes up in rommon on the reload, because it will not show up in the
"sh mod" in this case).
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