[c-nsp] ASR920 Break Into ROMMON

[Scott Miller]

I have a ASR-920-12SZ-IM, which I inadvertently entered the wrong boot
command in the config, saved the config and rebooted.  Now it's stuck in a
boot loop.  I've tried breaking the boot, it asks if I want to reset to
factory default, and I enter "y", it reboots but still tries to find that
same bad ios file I entered in the initial configuration which was supposed
to have been whipped when it went to factory default.  I can't for the life
of me figure out how to get into ROMMON on this box.  Each time I break the
boot, it just goes back to the same question, asking if I want to factory
default.

Here's what it's doing:


System Bootstrap, Version 15.5(3r)S2, RELEASE SOFTWARE (fc1) Technical
Support: http://www.cisco.com/techsupport Copyright (c) 2015 by cisco
Systems, Inc. Compiled Wed 01-Jul-15 03:53 by sdcunha Starting
Initialization of FMAN0 Loading ucode for FMAN0, size: 31424, ver:
106.04.14 Silicon Rev Major:Minor [1:1] Initializing the pci.. IOFPGA
version[17082912] Boot ROM0 Last reset cause: BootFromUpgradeRegFail UEA
platform with 1572863 Kbytes of main memory PASSWORD RECOVERY FUNCTIONALITY
IS DISABLED .....Break detected: (0x1) Do you want to reset the router to
the factory default configuration and proceed [y/n] ?y Router rebooting
with factory default configuration System Bootstrap, Version 15.5(3r)S2,
RELEASE SOFTWARE (fc1) Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2015 by cisco Systems, Inc. Compiled Wed 01-Jul-15 03:53 by
sdcunha Starting Initialization of FMAN0 Loading ucode for FMAN0, size:
31424, ver: 106.04.14 Silicon Rev Major:Minor [1:1] Initializing the pci..
IOFPGA version[17082912] Boot ROM0 Last reset cause: BootFromUpgradeRegFail
UEA platform with 1572863 Kbytes of main memory PASSWORD RECOVERY
FUNCTIONALITY IS DISABLED .....Resetting upgrade counter from failed
upgrade Directory asr920-universalk9_npe.16.06.05a.SPA.bin not found Unable
to locate asr920-universalk9_npe.16.06.05a.SPA.bin directory Unable to load
asr920-universalk9_npe.16.06.05a.SPA.bin boot: error executing "boot
bootflash:asr920-universalk9_npe.16.06.05a.SPA.bin" autoboot: boot failed,
restarting...

 The boot file  bootflash:asr920-universalk9_npe.16.06.05a.SPA.bin is
invalid and does not exist.  The correct file which is on the box
is  bootflash:asr920igp-universalk9_npe.16.06.05a.SPA.bin

Anyone know how to break into ROMMON to blow out this config?  I've been at
it for a couple hours, nothing I've found googling seems to work.

Thanks.