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Finding DLNA renderer in "Playing Now"

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PhDSM:
For several years, which means several versions of MC,  I face a problem with the list of DLNA renderers in Playing Now.
I have 3 DNLA renderers running on Raspberries Pi with upmdcli as client.
My issue is the following :
When I restart windows and then autostart Media server and Media Center, most of the time no DNLA renderer shows  on the "Playing Now" list (even if I press Refresh Dynamic Entries). I have to exit MC and start again  and then they are all there.
Sometimes also, one of them disapear. If I check on windows explorer, it appears as media device but not on the MC Playing Now list (even if I use Refresh Dynamic Entries), again I have to exit and restart MC to find it.
How to investigate and fix such problem ?

Regards
Philippe

markf2748:
First WAG:  some issue with MC's Discovery Server on your system.  Here's an investigation to try:

(1) Open a tab showing (Left panel tree) > Services & Plug-ins > Media Network > Server > Device Discovery Server (SSDP)

(2) Look at the Port which MC lists right there for the Discovery Server.  Usually it is Port 1900 (UDP), which of course must be open in your LAN firewall.

(3) Look for events where your MC server does UDP polls asking for other network devices to identify themselves.  These have:
"Source" = your MC Server's IP Address
"Resource" = M-SEARCH: http://. . . . . :1900

(4) Now press "Refresh Dynamic Entries" as you described.

(5) On my system that press results in an immediate group of events of type (3) above.

Is that happening on your system after restart?

BTW, the rightmost button (just below the tabs) SSDP (Device Discovery) handily gives you discovered IP information, and also contains a rescan button.

It would take an auto-started Wireshark session to get all the response details, but maybe this little investigation can tell you something.

Another thing (Startup settings):

Under Windows Services, look for JRiver Media Center 30 Service.  RMB > Properties > Start up type > Manual
Seems counter-intuitive, but Manual startup currently works for me in conjunction with:

MC Options > Startup > Windows Startup > Run on Windows startup:  Media Center and Media Server.

At least for me on a simple Wi-Fi LAN, this combination apparently results in correct timing for the initial UDP polls.

I also have Media Center 30 set to "On" in Windows > Settings > Apps > Startup

Windows 11 Pro (64-bit)  JRiver MC 30.0.87

JimH:
PhDSM, it's DLNA, not DNLA.  I changed your subject.

What is the full version of MC that you're running?

PhDSM:
I'm currently running MC30.0.82 on Windows 10 pro version 21H2.
However I've faced this problem for many years (at least since MC28)
I didn't report before because the work around was easy as I need just to restart MC again to fix it, but after few years of restart MC at reboot, it starts to be annoying especialy when I use MC as remote media server and I'm away with no direct access to the interface to restart MC remotely.

System infos:
Processor I56500
Mother board ASUS H270-Pro
Link to internet via on board Ethernet 1G Adapter

Do you need more config info ?

JimH:
Something is different about your setup.  Two network segments?

What does the PC Ethernet connect to?  A cable modem/router?

Try running Media Server on Windows startup.

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