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[Jonathan Woytek]

Really, really dumb question: Have you tried clearing and reloading/rebuilding your patch with Dante Controller?

I’m using DVS on High Sierra with an older (2010-vintage) MBP and a 2014 MBAir with no serious issues. I have had issues if Dante Controller was running before I started DVS. My process now is to make sure I have DVS running before I start DC, if I intend to use DVS on that machine.

Just some food for thought..

Jonathan

[Andrew Broughton]

After troubleshooting this over several weeks with Audinate, it turns out the issue is one of IGMP v2 being enabled. MacOS does not properly support IGMP v2, which I suspect the switches have enabled. It's a rental system with password-protected switches so it's something I'm not going to fix until the equipment goes back.
IGMP v3 is supposedly fine,  but if IGMP v2 is enabled anywhere, it stops DVS from working on Macs.

https://serverfault.com/questions/819793/os-x-network-stack-ignores-igmp-membership-queries

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjE8f-77JfaAhUI5mMKHeTwAtAQFggpMAA&url=https%3A%2F%2Fwww.audinate.com%2Fsites%2Fdefault%2Ffiles%2FPDF%2Fadvanced-dante-networking-avnw-2015-audinate.pdf&usg=AOvVaw07-DSC95qdO5IgFO66Zb5x
(pg 66)

[Scott Holtzman]

After troubleshooting this over several weeks with Audinate, it turns out the issue is one of IGMP v2 being enabled. MacOS does not properly support IGMP v2, which I suspect the switches have enabled. It's a rental system with password-protected switches so it's something I'm not going to fix until the equipment goes back.
IGMP v3 is supposedly fine,  but if IGMP v2 is enabled anywhere, it stops DVS from working on Macs.

https://serverfault.com/questions/819793/os-x-network-stack-ignores-igmp-membership-queries

https://www.google.ca/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjE8f-77JfaAhUI5mMKHeTwAtAQFggpMAA&url=https%3A%2F%2Fwww.audinate.com%2Fsites%2Fdefault%2Ffiles%2FPDF%2Fadvanced-dante-networking-avnw-2015-audinate.pdf&usg=AOvVaw07-DSC95qdO5IgFO66Zb5x
(pg 66)

That is really interesting Andrew.  If you ever get access to switches you can turn on IGMP snooping and watch the negotiation.

I didn't think Dante used Multicast so it seems like turning it off is a better bet.

Sent from my VS995 using Tapatalk

[Andrew Broughton]

I didn't think Dante used Multicast so it seems like turning it off is a better bet.

It’s a big part of Dante when sending to multiple locations. Look up FLOWS on the Audinate or Yamaha website to learn more.
In my setup certainly MC is not needed, but it’s very commonly used. However, IGMP may not be necessary unless you have a ton of data and/or are sharing the network with Non-Dante traffic. (Who does that anyway??)



Sent from my iPhone using Tapatalk Pro

[David Sturzenbecher]

It’s a big part of Dante when sending to multiple locations. Look up FLOWS on the Audinate or Yamaha website to learn more.
In my setup certainly MC is not needed, but it’s very commonly used. However, IGMP may not be necessary unless you have a ton of data and/or are sharing the network with Non-Dante traffic. (Who does that anyway??)



Sent from my iPhone using Tapatalk Pro

I feel like I heard (from the Yamaha guide) that IGMP only needed to be turned on only when you were using multicast and an access point on the network. I have used both, but fortunately not at the same time, so I have never enabled IGMP. 

Was it determined if this was related to all macs? Or just those running high sierra?


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[Robert Lofgren]

According to the link provided macos does the right thing according to the rfc while windoze doesn’t care with respect to igmp3.

MacOS does not properly support IGMP v2

[Andrew Broughton]

According to the link provided macos does the right thing according to the rfc while windoze doesn’t care with respect to igmp3.

Audinate says:
“This is the IGMP snooping issue. You will need to find the IGMP version 2 device in the network that is causing this problem and remove it.
Or disable IGMP snooping on the Dante network. Apple will discard our clock packets if IGMP version 2 packets are detected. It’s a known issue that they refuse to fix.”


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[Ade Stuart]

That is really interesting Andrew.  If you ever get access to switches you can turn on IGMP snooping and watch the negotiation.

I didn't think Dante used Multicast so it seems like turning it off is a better bet.

Sent from my VS995 using Tapatalk

Dante uses unicast for audio transport by default and can use multicast for audio, this can be useful when there are lots of receivers.
It does however need multicast for clocking and name resolution.

From Audinate
 mDNS and DNS‐SD for discovery and enumeration of other Dante devices (including Dante Controller and Dante Virtual
Soundcard).
o This traffic is on 224.0.0.251:5353.
 Precision Time Protocol (PTP) for time synchronization.
o This is generally a few small packets, a few times per second. This traffic is on 224.0.1.129 - 224.0.1.132 ports 319/320.
 Dante-specific monitoring traffic on multicast addresses 224.0.0.230 - 224.0.0.232:8700-8706.

[ProSoundWeb Community]