@soulfran 

In the OC, you can speed test your WAN speed periodically according to the rule...

And, you can set up a reboot schedule on it.

 Check the UG: https://www.tp-link.com/en/support/download/omada-software-controller/

6020 not avail. So, maybe consider an upgrade. 6020 is EOL from my research.

https://www.tp-link.com/en/business-networking/all-omada/

@Yannie Thanks, but what I need at least a way to ssh to the router and execute both task or any legally management tool used by TP Link. Do you know if there any option? Thanks!!!

@soulfran 

Not certain. There is one thing allows you to remote management your router. This router simply does not support these functions. Uncertain about if they'll add this or not. You can write emails to the support team and suggest this. We'll give feedback to the R&D. 

Log in your router and manually reboot it. How to configure remote management on SMB router using the new GUI?

Bandwidth control... I don't know. You need to fill out the up/down stream in the WAN settings. That's not smart but it is the way. Bandwidth control has its rules. You can check its UG and learn more

UG: https://www.tp-link.com/us/support/download/tl-er6020/#Emulators

How to configure Session Limit and Bandwidth Control to control traffic on SafeStream routers using the new GUI?