Re: [Dots] AD review of draft-ietf-dots-signal-channel-25 (1st Part)

["Konda, Tirumaleswar Reddy" <[e-mail]>]

> -----Original Message-----
> From: Dots <[e-mail]> On Behalf Of
> [e-mail]
> Sent: Thursday, January 17, 2019 1:16 PM
> To: Konda, Tirumaleswar Reddy <[e-mail]>;
> Benjamin Kaduk <[e-mail]>; [e-mail]
> Cc: [e-mail]
> Subject: Re: [Dots] AD review of draft-ietf-dots-signal-channel-25 (1st Part)
> 
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> 
> Re-,
> 
> OK.
> 
> Given that we don't have an explicit mention about this in 8305, I added this
> NEW sentence echoing what was in 6555:
> 
>    Note that the DOTS client must cache information regarding the
>    outcome of each connection attempt, and it uses that information to
>    avoid thrashing the network with subsequent attempts.

Minor change:

Note that the DOTS client must cache information regarding the
outcome of each connection attempt for a specific time period (e.g. 10 minutes), and it uses that information to
avoid thrashing the network with subsequent attempts.

-Tiru

> 
> Cheers,
> Med
> 
> > -----Message d'origine-----
> > De : Konda, Tirumaleswar Reddy
> > [mailto:[e-mail]]
> > Envoyé : jeudi 17 janvier 2019 08:16
> > À : BOUCADAIR Mohamed TGI/OLN; Benjamin Kaduk; draft-ietf-dots-signal-
> > [e-mail] Cc : [e-mail] Objet : RE: AD review of
> > draft-ietf-dots-signal-channel-25 (1st Part)
> >
> > > -----Original Message-----
> > > From: [e-mail]
> > > <[e-mail]>
> > > Sent: Thursday, January 17, 2019 12:33 PM
> > > To: Konda, Tirumaleswar Reddy
> <[e-mail]>;
> > > Benjamin Kaduk <[e-mail]>;
> > > [e-mail]
> > > Cc: [e-mail]
> > > Subject: RE: AD review of draft-ietf-dots-signal-channel-25 (1st
> > > Part)
> > >
> > >
> > >
> > > Hi Tiru,
> > >
> > > As you know RFC8305 obsoletes RFC6555.
> > >
> > > I fail to see where caching results is mentioned in 8305. Do you?
> >
> > Though RFC8035 obsoletes RFC6555, it is still compatible with RFC6555
> > (see https://tools.ietf.org/html/rfc8305#appendix-A)
> > It is useful to cache the happy eyeball results for a specific time.
> >
> > -Tiru
> >
> > >
> > > Cheers,
> > > Med
> > >
> > > > -----Message d'origine-----
> > > > De : Konda, Tirumaleswar Reddy
> > > > [mailto:[e-mail]]
> > > > Envoyé : mercredi 16 janvier 2019 12:11 À : BOUCADAIR Mohamed
> > > > TGI/OLN; Benjamin Kaduk; draft-ietf-dots-signal- [e-mail] Cc :
> > > > [e-mail] Objet : RE: AD review of
> > > > draft-ietf-dots-signal-channel-25 (1st Part)
> > > >
> > > > Hi Med,
> > > >
> > > > Please see inline
> > > >
> > > > > -----Original Message-----
> > > > > From: Dots <[e-mail]> On Behalf Of
> > > > > [e-mail]
> > > > > Sent: Wednesday, January 16, 2019 1:30 PM
> > > > > To: Benjamin Kaduk <[e-mail]>; draft-ietf-dots-signal-
> > > > > [e-mail]
> > > > > Cc: [e-mail]
> > > > > Subject: Re: [Dots] AD review of
> > > > > draft-ietf-dots-signal-channel-25 (1st
> > > > Part)
> > > > >
> > > > > >
> > > > > >                                   These connection attempts are
> > > > > >    performed by the DOTS client when it initializes.  The
> > > > > > results of
> > the
> > > > > >    Happy Eyeballs procedure are used by the DOTS client for
> > > > > > sending
> > its
> > > > > >    subsequent messages to the DOTS server.
> > > > > >
> > > > > > I see this is scoped to "when the client initializes", so I
> > > > > > don't know whether it adds more or not to end with "for the
> > > > > > duration of the DOTS session" or some similar scoping for the
> > > > > > caching of the happy eyeballs results.
> > > > >
> > > > > [Med] The connection attempts are performed each time the client
> > > > > has to select among a list of v4, v6 (tls, dtls). This is
> > > > > particularly true when
> > > > the client
> > > > > initiates, but this may also be true each time the client has to
> > > > > select
> > > > among
> > > > > v4, v6, DTLS, TLS (e.g., the client attaches to a new network).
> > > > >
> > > > > I updated the text to:
> > > > >
> > > > > "These connection attempts are performed by the DOTS client when
> > > > > it initializes, or in general when it has to select an address
> > > > > family and
> > > > transport
> > > > > to contact its DOTS server."
> > > >
> > > > Happy eyeballs mandates caching the results, see
> > > > https://tools.ietf.org/html/rfc6555#section-4 (to avoid thrashing
> > > > the network).
> > > > We may want to update the above line accordingly.
> > > >
> > > > Cheers,
> > > > -Tiru
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