I am new to LTEⁱ (and networks alike), have a few questions on the S5ⁱ interface:
I was looking at the S5 tunnel creation sequence. I think this is how it goes:

Create Session Request:
SGW->PGW (S5 FTEID has PGW IP/port and TEID for the downlink Tunnel)

Create Session Response:
PGW->SGW (Uplinkⁱ TEID in header)

Q1: Does this establishes the tunnel pair? Does the CSRequest really have a non-zero TEID in the F-TEID, if not then does it come in during the following Modify Bearer Request?

The User plane would subsequently use the same TEID's, albeit it's own port for all communication on the default bearer. For other dedicated bearers, it would use the Create Bearer Request / Response sequence to generate TEID pairs exclusive to those bearers.

Is the above correct or it quite different.

Where can I get Sequence Diagrams for all LTE procedures?

Thanks!