Amazing this can be done! 
thank you but the issue is 1024 specific with full load
You could get an unmanaged switch (one with metal case and needed specs) and connect your router to it through single cable and then everything else to the switch.
Routers have some kind of switch built-in to have multiple ports, but detailed specs for these are rarely available.
For example this should do…
See here
Output through a NAA in this case removes any need to use DoP, since macOS CoreAudio is not involved at all.
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Some news…
I might actually be facing a network issue. I had a ramapage of static with… PCM mode before I got pure tone (1K Hz ?) and “no way to host” message and HQP seeing only naa…RED… or no naa at all in preferences
I was streaming from Qobuz with all ethernet cables plugged back to the ISP switch/box and fixed address to the Time Capsule with a single ethernet cable in for better WIFI (not used for music but for Client on iPad). Yesterday I had a seemingly ""problem solved session listening to France Musique radio channeled to HQP upsampling @1024. I left home for a couple of hours just muting preamp and when back I had the 1 (?) Khz tone. back then, all ethernet cables were plugged to the TC in DHCP router mode.
Seems the issue is unsolvable, that even if I acquire, say a second hand Cisco 801, a switch I won’t be able to trust the ISP provided box and they don’t have boxes without switches, wifi phone, you name it.
For the time being I convinced myself AHM7EC8B @1024 is too different/sweet from SDM with either ASDM7EC modulator or PCM (PCM LNS15 @ 16 or 32 x is much much closer to the ASDM7EC modulators than is AHM7EC8B) to be true.
I reverted my network to no static address, TC in bridge mode and I will be just happy if I don’t get stressful 1 KhZ and need to reboot everything after a while anytime I tap from the internet for music content
TWIMC, I revert all HQP preferences to default, DSP/CPU greyed, with PCM route limited to 768 for PCM sources so I can use ps hb m whenever apod counter is cool and ASDM7EC light as modulator for DSD souces
@jussi_laako I’d be happy to read your conclusions about my previous post and if you believe it would be worthy to introduce a new switch in my system, eventually using a thunderbolt to ethernet adapter to link the Mac Studio to the Time Capsule (or directly to the ISP provided box), with only the Studio (via its ethernet port) and the Red connected to it. Would a < to 20 € Netgear switch 802.3az be fine in the context of Studio/Red/May or should I put more money, ie in the power supply ?? I also have a very short ethernet cable between the box and the TC. I did not notice a difference with a longer cable but is short (0.5 m) ethernet cable bad practice ?
In the meantime thank you for the 2s versions of the hb, I’m back upsampling PCM to DSD with acceptable initialisation time and gorgeous sound.
I’m puzzled by the fact that I can’t sustain (regular dropouts) 512 x 48 while 512 X44.1 is OK even with n48 sources. It’s true even with the 512 fs version of ASDM7EC Light. BTW, I don’t hear a benefit (maybe the other way round) using 512 fs version @512. Should I ?
Has anyone an experience with 3M EMI RMF RMI absorbers ? Sometimes I indulge a good laugh reading reviews of multi bucks accessories such as ART’s which are probably a repackaging of 3M stuff…
No, don’t add more ethernet interfaces to any of your devices. You just place a suitable switch between all your devices and your firewall/router. What ever you use to provide internal network now. So only one link from the switch towards internet. And locally everything talks to each other through the switch. This is for example how I have it.
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