12-30-2021 12:57 AM
My cisco2921 router always boots into ROMMON. I can manually boot it by using the IOS in flash0.
What's the problem? what can I do?
Thanks in advance!
The following is the output of console:
System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2012 by cisco Systems, Inc.
Total memory size = 512 MB - On-board = 512 MB, DIMM0 = 0 MB
CISCO2921/K9 platform with 524288 Kbytes of main memory
Main memory is configured to 72/-1(On-board/DIMM0) bit mode with ECC enabled
Readonly ROMMON initialized
program load complete, entry point: 0x80803000, size: 0x1b340
program load complete, entry point: 0x80803000, size: 0x1b340
IOS Image Load Test
___________________
Signature did not verify
Signature DID NOT VERIFY
boot: cannot load "flash0:"
System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 2012 by cisco Systems, Inc.
Total memory size = 512 MB - On-board = 512 MB, DIMM0 = 0 MB
CISCO2921/K9 platform with 524288 Kbytes of main memory
Main memory is configured to 72/-1(On-board/DIMM0) bit mode with ECC enabled
Readonly ROMMON initialized
Compact Flash1: Not present
...... ......
rommon 2 > dir flash0:
program load complete, entry point: 0x80803000, size: 0x1b340
Directory of flash0:
2 97991400 -rw- c2900-universalk9-mz.SPA.152-4.M2.bin
23926 3064 -rw- cpconfig-29xx.cfg
24307 0 drw- ccpexp
24837 2464 -rw- home.shtml
23927 229065 -rw- crashinfo_20131015-093011-UTC
rommon 3 > boot flash0:c2900-universalk9-mz.SPA.152-4.M2.bin
program load complete, entry point: 0x80803000, size: 0x1b340
IOS Image Load Test
___________________
Digitally Signed Release Software
program load complete, entry point: 0x81000000, size: 0x5d736b0
Self decompressing the image : #################################################
...... ......
C2921>
12-30-2021 02:49 AM
Post the complete output to the command "sh version".
The boot-variable string could be configured to boot into ROMMON.
12-30-2021 05:08 PM
Thanks!
C2921>show version
Cisco IOS Software, C2900 Software (C2900-UNIVERSALK9-M), Version 15.2(4)M2, REL
EASE SOFTWARE (fc2)
Technical Support: http://www.cisco.com/techsupport
Copyright (c) 1986-2012 by Cisco Systems, Inc.
Compiled Wed 07-Nov-12 14:08 by prod_rel_team
ROM: System Bootstrap, Version 15.0(1r)M16, RELEASE SOFTWARE (fc1)
C2921 uptime is 5 minutes
System returned to ROM by power-on
System image file is "flash0:c2900-universalk9-mz.SPA.152-4.M2.bin"
Last reload type: Normal Reload
Last reload reason: power-on
This product contains cryptographic features and is subject to United
States and local country laws governing import, export, transfer and
use. Delivery of Cisco cryptographic products does not imply
third-party authority to import, export, distribute or use encryption.
Importers, exporters, distributors and users are responsible for
compliance with U.S. and local country laws. By using this product you
agree to comply with applicable laws and regulations. If you are unable
to comply with U.S. and local laws, return this product immediately.
A summary of U.S. laws governing Cisco cryptographic products may be found at:
http://www.cisco.com/wwl/export/crypto/tool/stqrg.html
If you require further assistance please contact us by sending email to
export@cisco.com.
Cisco CISCO2921/K9 (revision 1.0) with 487424K/36864K bytes of memory.
Processor board ID FGL1711115S
3 Gigabit Ethernet interfaces
1 terminal line
DRAM configuration is 64 bits wide with parity enabled.
255K bytes of non-volatile configuration memory.
250880K bytes of ATA System CompactFlash 0 (Read/Write)
License Info:
License UDI:
-------------------------------------------------
Device# PID SN
-------------------------------------------------
*0 CISCO2921/K9 FGL1711115S
Technology Package License Information for Module:'c2900'
-----------------------------------------------------------------
Technology Technology-package Technology-package
Current Type Next reboot
------------------------------------------------------------------
ipbase ipbasek9 Permanent ipbasek9
security None None None
uc None None None
data None None None
Configuration register is 0x2102
12-30-2021 05:41 PM - edited 12-30-2021 05:43 PM
@Sonnywo wrote:
boot: cannot load "flash0:"
Can we see the output to the following commands:
sh run | include boot sh bootvar
Update the firmware of the router as well. The current one is >7 years old.
01-03-2022 06:58 PM
It works now. Thank you so much!
The output and what I did:
rommon 4 > confreg
Configuration Summary
(Virtual Configuration Register: 0x2102)
enabled are:
load rom after netboot fails
console baud: 9600
boot: image specified by the boot system commands
or default to: cisco2-CISCO2921/K9
do you wish to change the configuration? y/n [n]:
... ...
C2921(config)#boot system flash0 c2900-universalk9-mz.SPA.152-4.M2.bin
... ...
01-03-2022 07:17 PM
@Sonnywo wrote:
C2921(config)#boot system flash0 c2900-universalk9-mz.SPA.152-4.M2.bin
The boot variable string syntax is not correct.
The router will boot the first useable image.
01-03-2022 10:13 PM
syntax is not correct? but the system didn't give an error:
C2921(config)#boot system flash0 c2900-universalk9-mz.SPA.152-4.M2.bin
C2921(config)#exit
C2921#wr
01-03-2022 11:24 PM
@Sonnywo wrote:
syntax is not correct? but the system didn't give an error:
Because you were not watching carefully. The syntax boot system flash0 c2900-universalk9-mz.SPA.152-4.M2.bin is not correct.
But it is OK. The developers have coded a fall-back where the router will boot the first useable IOS.
01-04-2022 12:30 AM
Thanks for you patience!
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