Hi Sridhar, Inline with PC2.
Thanks! From: Sridhar Bhaskaran <[email protected]> Sent: miércoles, 28 de julio de 2021 15:34 To: Pablo Camarillo (pcamaril) <[email protected]> Cc: David Allan I <[email protected]>; [email protected] Subject: [SUSPECTED SPAM] Re: [DMM] Additional questions/comments on draft-ietf-dmm-srv6-mobile-uplane-13 Hi Pablo / Dave all, See my additional comment inline marked [SB] Regards Sridhar On Wed, Jul 28, 2021 at 12:06 AM Pablo Camarillo (pcamaril) <[email protected]<mailto:[email protected]>> wrote: Hi Dave, Many thanks for your comments. Inline with PC. Cheers, Pablo. -----Original Message----- From: dmm <[email protected]<mailto:[email protected]>> On Behalf Of David Allan I Sent: viernes, 23 de julio de 2021 19:51 To: [email protected]<mailto:[email protected]> Subject: Re: [DMM] Additional questions/comments on draft-ietf-dmm-srv6-mobile-uplane-13 Hi: Looking over this draft it strikes me that IF you are discussing a GTP replacement, there are a few unaddressed gaps...or at least I see no mention of them. - adding X2 to the list of interfaces to be supported [PC] Do you think there is any new mechanism to be added to the currently defined ones? [SB] If we are including X2 then F1U also needs to be considered. Both X2 and F1U also have GTPU flow control mechanism defined in TS 38.425. I am not sure if a corresponding feedback mechanism exists in SRv6 for flow control. [PC2] The user plane message encoding, or Flow control, is out of the scope of this draft; but covered in draft-murakami-dmm-user-plane-message-encoding. Speaking as a co-author of draft-murakami: up to now we did not consider X2, but if the working group believes there is value then we could add it. Thanks. - support for end-marker for handoff stream synchronization (probably could fit the unused bit in Args.Mob.Session but frankly I have not studied this in detail) [PC] User Plane Message encoding is out of the scope of this draft. However, draft-murakami-dmm-user-plane-message-encoding-03 proposes a mechanism to encode the Echo Request, Echo Reply, Error Indication, and End Marker. - support for QMP (quality measurement protocol), which I believe needs to also extend across the radio interface so is not simply local to the GTP domain and can be "stunt doubled" [PC] Excellent point. Seems we missed this one in draft-murakami! We can add in there the QoS Monitoring Packet indicator, as well as the encoding for the timestamps and average DL/UL delays. - support for paging policy presence/indication [PC] Same as previous. Many thanks. [PC], By the way, I've posted an updated revision as the reference to draft-murakami was missing. If this has come up elsewhere, let me know Cheers Dave _______________________________________________ dmm mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/dmm _______________________________________________ dmm mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/dmm -- o__ _> /__ (_) \(_)... Burn fat not fuel - Bike along to a healthier life and cleaner world! :) Sridhar Bhaskaran
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