PTP with AirPlay and AES67 on the same device

[marcnnn]

Has anyone experience with ptp4l and Pipe wire AES67 and AirPlay 2 on the same device?
And on the same network interface...
Maybe on different VLAN interfaces could work?
I am thinking to try that on a Pi 5

could be related to this question #1712

[mikebrady]

Not sure this is a runner, TBH. Shairport Sync's companion app, NQPTP, uses ports 319 and 320 to monitor incoming PTP packets and provide timing information. On the face of it, it would mean another PTP app wouldn't be compatible.

[marcnnn]

Is it possible to run NQPTP on a specific VLAN interface so that I could use another VLAN interface for the ptp4l?

[mikebrady]

As it stands, NQPTP looks at all interfaces.

[mikebrady]

It's an interesting idea, though!

[marcnnn]

So I could:

A) add the possibility to use only a specific interface into NQPTP

B) move NQPTP and shairport to a Network namespace with only the VLAN interface in it.

[mikebrady]

Yes indeed. TBH, I don't know how to set up (B), but (A) could work. It could be put on the list of enhancements...