19 Jun
2019
19 Jun
'19
3:31 p.m.
On Wed, June 19, 2019 3:12 pm, Ethan Funk wrote:
I was under the impression...that the AVB's
precision network time management allows all devices to share a sample
clock.
That is correct for AVB as well as for the other RTP/IP (layer 3) based
transports such as Dante, Livewire, Ravenna, etc.
No asynchronous re-sampling would be required
Correct
I am not clear how one goes about setting up which
device on the network is the clock master
If you have access to IEEE specs see IEEE 1588-2008 and IEEE 802.1AS.
802.1AS is a profile of 1588-2008, there is what is known as "best master
clock algorithm" to select the best clock. If multiple devices are
advertising equivalent quality ranking there is a tie breaker, I think
based on MAC address, but don't quote that, I am going from memory and
have not looked at the details in quite a while.
--
Chris Caudle