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Beginner

Downgrading Nexus BIOS

I have a few 5010/5020 switches, and have upgraded some of them to 5.1(3)N1(1a) which contains the 1.5 BIOS.  However, subsequent downgrades either 5.0(3)N2(2b) or 5.0(3)N2(1) did not downgrade the BIOS to 1.3.  Is there a way to force the BIOS downgrade during 'install all' or a separate command to downgrade the BIOS?  I am pasting part of the 'install all' output for your reference.  Thanks.

Addy

Images will be upgraded according to following table:

Module       Image         Running-Version             New-Version  Upg-Required

------  ----------  ----------------------  ----------------------  ------------

     1      system            5.0(3)N2(2b)             5.0(3)N2(1)           yes

     1   kickstart            5.0(3)N2(2b)             5.0(3)N2(1)           yes

     1        bios        v1.5.0(11/30/10)        v1.3.0(09/08/09)            no

     1   power-seq                    v1.2                    v1.2            no

5 REPLIES 5
Cisco Employee

Downgrading Nexus BIOS

There is no way to force a bios upgrade until the OS is upgraded as well. You would need to upgrade to 5.1(3)N1(1a) to get this update.

Beginner

Downgrading Nexus BIOS

Colby, you may have misunderstood my question.  I would like to downgrade the BIOS  from 1.5 to 1.3 when downgrading NX-OS, but install all would not let me.

Cisco Employee

Downgrading Nexus BIOS

Once the bios is upgraded, I don't see a way to downgrade this. Is there a reasoing you are needing this to?

Beginner

Downgrading Nexus BIOS

Colby, I have to certify certain versions of NX-OS, and I need to have matching version of BIOS.

Cisco Employee

Re: Downgrading Nexus BIOS

There is no method to downgrade BIOS and it is not necessary

for us to downgrade BIOS when downgrading NX-OS.


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