RE: More context on ATSSS use case

[[e-mail]]

David,

The end-to-end QUIC connection will always survive.

If you refer to https://tools.ietf.org/html/draft-bonaventure-quic-atsss-overview-00#section-5.2, you will see that the external IP address seen by the remote server may be local to the ATSSS proxy or may be the one that is directly assigned to the UE.

Depending whether the UE’s address is preserved or not when the ATSSS proxy is involved, migrating flows outside the tunnel (for whatever reason) may or may not even require a connection migration!

Cheers,
Med

De : QUIC [mailto:[e-mail]] De la part de David Schinazi
Envoyé : lundi 26 octobre 2020 17:58
À : Olivier Bonaventure <[e-mail]>
Cc : QUIC <[e-mail]>
Objet : Re: More context on ATSSS use case

Hi Olivier, responses inline.

>
> The ATSSS Proxy has IP_ATSSS.
> The packets sent by the client are not sent to IP_Server here, they're
> sent to IP_ATSSS.
> If the ATSSS proxy becomes unreachable mid connection, the client's
> connection will break - because it's sending to IP_ATSSS not IP_Server.

The client will detect the failure of the ATSSS proxy and will then be
able to switch to non-ATSSS to directly reach the webserver/edge node.
Since the client uses the ATSSS for multiple applications, a failure of
the ATSSS proxy will be quickly detected.

How can it do this without the end-to-end QUIC connection failing?
Are you saying that the Client will migrate its end-to-end QUIC connection
away from the virtual ATSSS interface and go straight over Wi-Fi?

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