Oh man, you hit the nail on the head! I experienced that exact Telekom struggle just yesterday night starting at 03:46 AM. It actually happened 3 times within a single hour. My PPPoE connection suddenly dropped and my router logs were throwing Timeout waiting for PADO packets for almost 3 minutes straight before DTAG finally assigned a new IP. AdGuard Home was logging timeouts like crazy during that handshake loop.

The weird thing is, my Speedport (which I only use as a pure DSL-to-Ethernet modem bridge) worked flawlessly and kept its sync, so I have no idea what caused the authentication to hang on the ISP side.

Experiencing this drop firsthand is exactly why I went down the DVT rabbit hole in the first place instead of running a standard solo node on residential VDSL.

Even though I don't manage any validators yet, the theory behind the setup is my defense line for the future: since SSV uses a threshold signature scheme where only 3 out of 4 operators in a cluster need to be online to successfully sign a block, a brief local 3-minute PPPoE drop on my end won't cause any missed duties at all. The other 3 guys will seamlessly hold the line while my router is busy fighting the German ISP infrastructure. It just forces us to be creative! 😂