@nogueiratech https://www.tp-link.com/en/support/faq/2609/

@Darksigns Only hint is "System tools>Firmware Upgrade"

@Darksigns I am almost ready to give up with this old fw:) Try to enable AAA just globally by "aaa enable" command (not sure about the command), and try again enable-admin

@Darksigns Ok, I think I've got it. Go to full admin mode by "enable-admin".

@Darksigns by the way, if you do not want to update and Andone's solution is OK for you, you still can try to check full configuration by "show run" and you will see, what commands switch used for...

@Darksigns dafaq?)) Upgrade your FW. I will just say one more time, that I advise you to upgrade your v2 switch with v3 firmware, which has different design on some features, e.g. vlans, but it is...