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[Dyncast] Continue questions for draft-li-dyncast-architecture-00

Lizhong Jin <lizhongj@qti.qualcomm.com> Sat, 13 March 2021 14:15 UTC

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From: Lizhong Jin <lizhongj@qti.qualcomm.com>
To: "dyncast@ietf.org" <dyncast@ietf.org>
Thread-Topic: Continue questions for draft-li-dyncast-architecture-00
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Date: Sat, 13 Mar 2021 14:15:07 +0000
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Subject: [Dyncast] Continue questions for draft-li-dyncast-architecture-00
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Hi all,
Thanks for the presentations. I still have some questions left, and would like to post them here.

  1.  How to identify a new flow for a service? By mismatching the binding table?
  2.  How to identify an end of flow? Timing out a flow would sometimes be dangerous. What if the flow continues while the flow entry has been timed out? For TCP, you could simply using FIN packet instead of timeout. But what to do for UDP?
  3.  How to setup and maintain the same instance affinity for the application with multiple flows? E.g., FTP connection setup with two 5-tuple flows. How would D-Router know the two flows should maintain the same service instance?
  4.  Regarding the Figure 1: Dyncast Architecture, does Dyncast provide end-to-end guarantee for service quality? I ask this question because I don't see how to setup a guarantee path between service instance and D-Router, client and D-Router.

Regards
Lizhong

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