Nexus 7009: Downgrading from 6.2.1 to 5.2.9

[dfranjoso]

Hello!

When i try to downgrade a N7009 from 6.2.1 to 5.2.9, i got htis error

switch# show install all impact kickstart n7000-s1-kickstart.5.2.9.bin system n7000-s1-dk9.5.2.9.bin
Installer will perform impact only check. Please wait.

Verifying image bootflash:/n7000-s1-kickstart.5.2.9.bin for boot variable "kickstart".
[#                   ]   0% -- FAIL.
Return code 0x40450030 (Digital signature verification failed).
Pre-upgrade check failed. Return code 0x40930011 (Image verification failed).

Still the MD5 checksum from both files are absolutely identical! Need you help.

David                 

[Steve Fuller]

Hi David,

Is NX-OS 6.2(1) the correct version? The reason I ask this is because as far as I'm aware this release is not officially available at this time. I've just checked again and there are no release notes or download option for NX-OS 6.2 on CCO currently.

Assuming you've not made a typo in the release you're trying to downgrade from, the best advice I can offer at this point would be to attempt a multistep downgrade to either NX-OS 6.1 or 6.0 first. It may be that a single step downgrade from NX-OS 6.2 to 5.2 is not a supported option, but as there's no documentation for NX-OS 6.2 at this time we don't know.

At least if you can get to either a 6.1 or 6.0 release, then when you attempt the downgrade to NX-OS 5.2 it'll be one shown as supported.

Regards

[rakdutt]

Hi David,

Please provide below outputs:

1. show ver

2. show mod

3. dir bootflash:

Cheers!!

Rakesh

[relsethagen · Accepted solution]

A 7009 with a supervisor 1 is a fairly rare beast. If your 7009 has supervisor 2 you cannot downgrade to 5.2.

[dfranjoso]

You are absolutely right! Thanks.