@Clive_A Hi, trust me, when I switch over to static IP I have entered the default gateway :-) With a static IP it works for 20-30 pings and then some pings not, after that again 20-30 pings and so...

Hello, sorry for the late answer, but meanwhile I have figured out where the problem is. In my eyes it's definitly a problem of the TP-Link switch. I've testet a lot, with changing default VLAN,...

Hi @Clive_A , thanks for your reply. Wwe have other switches conntected to the core and no problem with them, when we ping it. Currently there is only 1 accesspoint connected to the TP-Link switch....

Hello, we have a TL-SG1016PE switch which is connected to a Dell core switch. Everything is working, but the management website is temporary not available. When I connect to the Dell switch and make...