@CarlosGuida I would say it is very unlikely, that your switch is broken. Try to upgrade with other PC, browser in Private mode. You can try to bring it back to the shop, but usually FW upgrade...

@CarlosGuida I can't say anything about Utility, but Web-interface cares a lot for browser cache. https://community.tp-link.com/en/business/forum/topic/161894 - check this topic.

@Chanax TL-ER6120 has several IPSec tunnels and only R600VPN has a problem? It is not clear, why you do not give info about your 6120....

@RevM Maybe it is possible, but I do not know, how to do it :)

@alfredudu You either use Link Backup feature to have only 1 WAN enabled and 2nd WAN enabled only after 1st WAN is down, or you tick Enable Application Optimized Routing, so 1 APP works through 1...

@RevM I use not Putty, but Kitty with Scripting. It has Line delay for cisco-like switches. You can easily batch commands.