You can try the beta firmware below to see if it will solve your problem....

Your description is a little confusing. Anyway you can follow the FAQ below to configure your TL-ER6120. If your TL-ER6120's PPTP is working on lan-to-lan mode, please click the following link:...

Set a static IP address for your computer like 192.168.1.121 . Then you can log into the config page of your switch via the IP address 192.168.1.1 .

It is not the switch's fault if you think the OID is not documented in detail. Because the switch is only responsible for offering parameters, and the SNMP software is responsible for explaining...

You can check the following link to see the power supply of TL-SL3428. http://www.tp-link.com/en/products/details/?categoryid=&model=TL-SL3428#spec It is not complicated to check these parameters on...

Sorry, I can't upload the image. You just need to go to system -> system info -> system time, then you will know what to do.