@pman2022 On the router DHCP settings, change the lease time to the maximum you can use.

@urbnsr It will be much easier to choose an ER605. Although you need to do all configurations, consider the performance improvement, it's still worth it to get the upgrade.

@KTuulos Yes ER605 is suitable to create multi VLANs and can do access control between them. However I'm not using IPv6 so I don't know if it work for pure IPv6 devices. The router has some basic...

@urbnsr Sad thing is, there is not way to translate the old router config file to ER605. You may contact local tp-link support or just purchase it from Amazon

@NumberingRavens I feel like it's the web browser issue... What will happen if you login the controller vie omada cloud website? Try clean the web browser cache and use incognito mode.

@buy.guru What kind of " maintenance page" you want? Like a status page? But under my testing, the tp-link portal will not work when internet is not working. The authentication page just cannot come...