So, UDM Pro is ordered. Supposedly new as a return for €325.
I did a bit of research. Apparently, you can set this thing so that NAT is disabled and a script via cronjob prevents resetting on reboot. I’m curious.
The plan now is: Telekom DSL, Fritzbox with its own network and static route to the UMD Pro, telephony and Magenta on the Fritzbox, UMD Pro behind it and the rest segmented into VLANs.
I’m curious if it will work as desired.
That should work like this.
Because general tips were asked for.
My opinion:
Especially in the network area, if in doubt, you have to study 1000 protocols to get VoIP, IPTV, or other topics running in your network in the end. You need some enthusiasm or a taste for pain.
Therefore, like Tarnari. If possible, keep things like MagentaTV and VoIP out of the "complex" network. For IPTV, you might get lucky by choosing components that support IGMPv3; with VoIP, you're like on the high seas in God's hands. I witnessed live how 4 T-technicians desperately and nearly in tears tried one after the other to get the SIP trunk running as a PMX replacement on a Cisco gateway. In the end, following my suggestion, they took some kind of digitalization box from the warehouse, and it worked after 10 minutes.
Always keep networks as simple as possible unless it’s your hobby.
For WLAN, the same applies for me. "Professional" equipment doesn’t make everything better, just more difficult. When it comes to APs, pay attention to things like the mentioned DFS, TPC, and Band Steering (which doesn’t just let the client decide which network is better for it). Ubiquiti is a good choice, basically regardless of which APs, but it is more complex to configure and more prone to misconfiguration than, for example, AVM.
Basically, the rule is: the more present the provider is in the German market, the more likely there are adjustments for German providers like Telekom in the area of VoIP or at least guides or a community that can help.
For those who want to tinker: inform yourself beforehand. How does my provider handle multicast, which codec is used for VoIP, which ports, etc. That prevents annoying bad purchases by recognizing in advance where you will have problems.