10-30-2017 11:25 AM - edited 03-08-2019 12:33 PM
Hi Team,
I have cisco 1812 with "c181x-advipservicesk9-mz.124-24.T4.bin" and Router is getting formatted frequently.
Is IOS upgrade will resolve the issue?
Please suggest on the above to resolve the issue.
10-30-2017 11:30 AM - edited 10-30-2017 11:34 AM
Hi
I assume this behavior is seen once the router is restarted, right?. It could be generated because it is not using the correct config-register, probably it has configured 0x2142, it can be seen through: show version
Now you can set up the following command:
conf t
config-register 0x2102
write
Then reboot the device to take effect.
Hope it is useful
:-)
10-30-2017 11:35 AM
Hi Julio,
Thanks for the replay.I have already checked the same and the device Configuration register is 0x2102.
Please let me know is it IOS issue.
10-30-2017 11:38 AM - edited 10-30-2017 11:51 AM
Hi
So It could be a bug. Try with the IOS upgrade, also check the hardware requirements before.
10-30-2017 02:06 PM
What is getting formatted ? The flash ?
10-30-2017 02:11 PM
Entire config is getting erased.
10-30-2017 02:15 PM
Hi
That is very weird, it is pointing to a bug.
10-30-2017 02:20 PM
Could be a bug...I haven't found one so far.
Either way, try to reformat the flash and erase the nvram...
wr erase
erase flash
format flash
11-01-2017 06:18 AM
hi julio,
ihave one more 891 cisco router with "c800-universalk9-mz.SPA.156-2.T1.bin" IOS where we are facing the same issue .
Please suggest on this.
11-01-2017 06:22 AM
Hi
It is a weird situation, different images, try to upgrade to the recent image, have you tried to open a ticket with the Cisco TAC?
11-01-2017 06:45 PM
Have you verified that you are on the current version of ROMMON (12.3(8rYH13))? It could be a ROMMON defect, since it could have to do with the initialization of NVRAM during boot. I also notice you are on a "T"-train IOS with years of security and other defects. Best practice is to operate on M (mainline) release when possible, since T (Technology) train OS often release with bleeding edge features, but before the most proven testing. On top of that, the entire 12.4(24)T line for 1812 was fully removed form the website, so there could be a reason. Do you have the 256MB DRAM and 32MB available flash needed to move to 15.x code? If so, I would patch ROMMON first and see if it resolves, then I would move to the more secure code if simply patch ROMMON didn't resolve. You could simply have bad NVRAM if neither of these work, or you really don't have 0x2102 as your config-register.
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