Toni,
This is a common misconception. AES67 has been developed to work on any standard ethernet switch. It has no requirement for PTP on the switching infrastructure. There is a PTP requirement on the endpoints. An excerpt from
this FAQ.
"What is the difference between AES67 and AVB?The AVB standards define improvements to the standard Ethernet layer 2 protocol to provide synchronization, Quality of Service (QoS) and an admission control behaviour that prevents the network from becoming overloaded by media traffic;
an AVB network requires use of specific AVB Ethernet switches. AES67 utilizes protocols on layer 3 or above, so is able to function using standard Ethernet switches. While it is entirely possible for AES67 to function over an AVB network, AES67 will not receive any performance benefits from the capabilities of the AVB network, except if the AES67 device fully supports the AVB layer 2 protocol stack."
I am not as familiar with SMPTE ST-2059-2, but I know it uses AES67 for the audio transport and therefore I suspect it has similar requirements (standard network switch).
