K-Series 'set ssh enabled' command is Lost upon 7.31.04 to 8.02.01 Upgrade

[FAQ_User]

Article ID: 15069

Products
K-Series; firmware 7.31.02.0008, 7.31.03.0010, 7.31.04.0002

Changes
Enabled SSH access to system management ('set ssh enabled').
Then, upgraded firmware from 7.31.04.0002 (or lower) to 8.02.01.0012, and rebooted onto it.

Symptoms
The non-default 'set ssh enabled' command is no longer present ('show config ssh').

Cause
Design differences in NVRAM format prevent the pre-upgrade SSH state from being read post-upgrade, defaulting it to "disabled".

Solution/Workaround
Rather than upgrading to 8.02, upgrade to firmware 8.11.03.0005 or higher.

Workaround:
After the fact, use telnet or serial console to re-add the missing command.

To prevent such configuration loss, use the CLI in order to boot onto firmware 8.02.01.0012 with the refreshed configuration.
That is...

code:

show config outfile slot11/.cfg

[Locally save the non-volatile config]

code:

set boot system K-80201-0012

[Set up to load the new firmware upon reset]
(

code:

Reboot to new code?

Type "

code:

n

" for no) [ but don't reset yet]

code:

configure slot11/.cfg

[Initiate a load of the saved configuration]
(

code:

Reboot and reload config?

Type "

code:

y

" for yes) [Confirm it, then load the new firmware]