Telechat Review of draft-ietf-dmm-tn-aware-mobility-27
review-ietf-dmm-tn-aware-mobility-27-intdir-telechat-haddad-2026-07-06-00

Request Review of draft-ietf-dmm-tn-aware-mobility
Requested revision No specific revision (document currently at 27)
Type Telechat Review
Team Internet Area Directorate (intdir)
Deadline 2026-07-06
Requested 2026-07-01
Requested by Éric Vyncke
Authors Uma Chunduri , John Kaippallimalil , Sridhar Bhaskaran , Jeff Tantsura , Luis M. Contreras
I-D last updated 2026-07-06 (Latest revision 2026-07-06)
Completed reviews Genart IETF Last Call review of -25 by Linda Dunbar (diff)
Secdir IETF Last Call review of -26 by Jon Geater (diff)
Intdir Telechat review of -27 by Wassim Haddad
Comments 
Thanks in advance, this is probably 3GPP-related
Assignment Reviewer Wassim Haddad
State Completed
Request Telechat review on draft-ietf-dmm-tn-aware-mobility by Internet Area Directorate Assigned
Posted at https://mailarchive.ietf.org/arch/msg/int-dir/YDu6FiJX8CeawG2dHYhQOyqMG1c
Reviewed revision 27
Result Ready w/nits
Completed 2026-07-06
review-ietf-dmm-tn-aware-mobility-27-intdir-telechat-haddad-2026-07-06-00
Summary: The draft describes using the GTP-U bearer outer UDP header source
port as the slice selector on F1-U/N3/N9 interfaces, since the S-NSSAI is
invisible to the transport network. Although the document core idea is well
described, it takes "a while" to get there making the draft a bit "heavy" to go
through until section 3.3. IMHO, the draft can/should be shortened till section
3.3.

Nits: Section 4 says:
"An example with different user plane slice types and transport paths is shown
in the figure." AND "The figure shows UDP port ranges, SST, transport path (in
this example pseudowire/VPN) and transport path characteristics."

=> Would be useful to mention which figure you're referring to.

Thanks!