Hi @IIIdefconIII Thanks for the feedback. May I ask your network scenario in detail? Any screenshot would be appreciated.

Hi @tradenet The current firmware is a little bit outdated with Omada Controller V6, so please try to upload the firmware file manually to 5.2.2 firstly, and then to 5.2.3 (the latest firmware) with...

Hi @AngelaGarza May I know if you checked the dashboard and logged in in local network or remote network? Would the WAN online after a while and restored the connection? You may try to ping 8.8.8.8...

Hi @zisconnected May I know the model of your SFP+ DAC connected between the two switches? Did you try to bypass the switch one by one and check if the speed of the EAP660 HD got better? Can you...

Hi @Thinkster May I know the model number of your switch as well as your network topology? You may refer to the guide below for some advice: How to discover Omada devices via Software Controller and...

Hi @Jeesoon1 May I know what is your network topology? It is mentioned that you have VLAN and VPN connection, so any configuration screenshot would be appreciated.