Windows 10: Windows Server 2019 Cannot Join A Multicast Groups

Hi, We currently utilize a recording software that is operating on a Windows Server 2019 within an S2D system, specifically hosted on Hyper-V infrastructure. We've recently identified an unusual occurrence where the Windows Server is unable to join the unused multicast group. To resolve this, we've found that initiating the multicast group join request from a Windows 10 Pro workstation enables the Windows Server to successfully request the desired multicast stream. Our multicast configuration is established in Sparse mode, utilizing specific multicast addresses. We're interested in discoverin

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Joined multicast groups limit

What is maximum amount of joined multicast groups by application in windows? (2012R2/2016) For example in Linux, the default one is 20, but it can be increased. I have not found any documentation mentioning it, also anything in registers.

 

Joined multicast groups limit

Hi,



Thank you for posting your concern on Microsoft Answer Community.



Your issue related to multicast groups limit is more appropriate to be posted in Microsoft TechNet forum. Please post this question in the
TechNet forum to get proper support.



Hope it helps.



Aditya Roy

Microsoft Community – Moderator

 

MDT Multicast

Hello Everyone,

I am new to MDT multicast and was hoping someone can answer my question, I set my MDT server up for multicast and it goes all the way to 99% and I watch it in the WDS console under my deployment share, I can see three clients and when they reach 99% and
I hit refresh the clients disappear which i think means it reached 100% but then on the client side its rolls back to installing operating system and starts the percent count again. Is multicast on MDT work different, does it first download the image to one
computer and once downloaded it distributes that one image to all others . I found an article below that explains how it should work but I am not sure if I am understanding it correctly.

Here is the overall process:

• ClientA starts a multicast session to download Win7SP1x86.wim from the MDT/WDS Server.
• When the broadcast session of Win7SP1x86.wim reaches 25%, ClientB joins the session in progress. ClientB knows that it missed the first ¼ of the Win7SP1x86.wim file, so it starts writing 25% into its local copy of Win7SP1x86.wim.
• When the multicast session reaches 100% of Win7SP1x86.wim, ClientA is done and drops off. However, ClientB is still missing the first ¼ of the file, and stays on the multicast chanel as it restarts (rolls back) to zero.
• Eventually the multicast session of Win7SP1x86.wim reaches the 25% mark where ClientB first joined. ClientB now has 100% of the file and drops off. No clients are connected, and the server stops broadcasting.