On Mon, Oct 30, 2017 at 01:37:57PM -0400, Frank Carmickle wrote:
It’s not clear to me if the 2xx reply from B is a retransmit, and thus the dialog isn’t actually established everywhere? As you know, the 2xx to the reinvite should be coming from A and not B. Maybe you meant to say A here?
Yep, I meant to say A there. :-) It's not a retransmission.
I’m not certain that I’m understanding your scenario, but if so, maybe this would help.
http://ietf-sip.1820103.n4.nabble.com/Re-Invite-before-ACK-td1820408.html
Thanks!