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[DMM] questions and comments to draft-ietf-dmm-tn-aware-mobility-07

Linda Dunbar <linda.dunbar@futurewei.com> Sat, 02 September 2023 02:36 UTC

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From: Linda Dunbar <linda.dunbar@futurewei.com>
To: "dmm@ietf.org" <dmm@ietf.org>
CC: "draft-ietf-dmm-tn-aware-mobility@ietf.org" <draft-ietf-dmm-tn-aware-mobility@ietf.org>
Thread-Topic: questions and comments to draft-ietf-dmm-tn-aware-mobility-07
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Date: Sat, 02 Sep 2023 02:36:34 +0000
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Archived-At: <https://mailarchive.ietf.org/arch/msg/dmm/WM9dmvlVirp7zgjwJmCUfYwpFyI>
Subject: [DMM] questions and comments to draft-ietf-dmm-tn-aware-mobility-07
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Uma, John, Sridhar, Jeff, and Praveen,

draft-ietf-dmm-tn-aware-mobility-07 has very good description of 5G system and 5G slices mapping to transport network VPNs.

I have some questions and comments:

  *   Section 3.1:
There are data plane traffic (i.e. UE<-> service instance in DC) and Control Plane traffic (UE<->gNB<-> 5G functions). Is the 5G End-to-End network slicing for the control plane and data plane?
For the data plane traffic, the End-to-End network sliding should continue from UPFs to the service destination (which could be VMs in data center).

  *   Section3.2:
Fronthaul network is very time sensitive. So must have very few links (hops) from IP perspective. Do you see applicability of TE in the Fronthaul network?

  *   Section 4: it would be clearer to emphasize that the transport network is really among 5G functions. So, from data plane perspective, the End-to-End transport has to traverse the IP network between the UPFs and the service destinations.

Thank you.
Linda Dunbar

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