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I'm facing issues enabling mDNS in Windows 10.

I've implemented the solution provided in this question and it works, but after running PC 24 hrs it vanishes and Bonjour Services can't find any mDNS locals:

A graphic of a blank BonjourServices window

IMG:

Running Service Browser app on my phone found mDNS locals :

IMG:

Restarting the PC is the only solution I have now.

Note: I Always use windows Sleep instead of Shutdown. Sleep does not prevent Bonjour Services from finding mDNS locals.

I hope the following PC info helps :

Windows info Screenshot

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  • I thought Windows 10 finally got its own built-in mDNS support and doesn't require Apple's Bonjour Services for Windows any more.
    – Spiff
    Commented May 4, 2020 at 17:29
  • Thanks for your insight @Spiff, However both cases whether I run Bonjour or not, The software I'm using can't find mdns locals (when it's considered not working). And the software(s) can find mdns locals (when it's considered working).
    – Hamza Hajeir
    Commented May 4, 2020 at 18:29
  • Possible duplicate of How to enable mDNS on Windows 10 build 17134?
    – Run5k
    Commented May 6, 2020 at 3:06
  • 1
    It seems that my first comment had the correct explanation. Is it good enough for an answer?
    – harrymc
    Commented Mar 17, 2021 at 21:06
  • 1
    The answer is submitted.
    – harrymc
    Commented Mar 18, 2021 at 8:52

1 Answer 1

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+100

The final comment in the post MDNS not sending queries to the network says:

This is most likely a known windows bug regarding multicast routing. Chased this issue for a year until finally Intel and Microsoft teamed up and gave this reply:

The engineering team has investigated this multicast issue with Microsoft. Microsoft is aware there's an issue with the multicast address managed by the OS. The issue has been introduced together with Windows 10 (WDI arch for WiFi Drivers.) Any scenarios of WLAN reconnected (i.e. Airplane mode, roaming out and back into RF range, or disconnect and reconnect to the same SSID) and then the multicast packets might be affected by this issue. Currently this issue is expected to be fixed for Windows 10 Version 21H1.

Basically will multicast stop to work if your wifi has any issues. Can only be resolved by disabling/enabling the interface, reboot machine (or toggle the ipv6 setting).

The problem here is with WiFi disconnection not being reestablished automatically. This is a bug with Windows which will (hopefully) be fixed in the next Windows release in the first half of 2021.

In the meantime, you might investigate the cause for WiFi disconnections, perhaps a problem of the hardware, of the working conditions or software/firmware not being up to date. You could also try to disable IPv6 in your local network. If nothing is found or can be improved, you will need to wait for the next Windows release.

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