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 Jon Shallow
> Sent: Thursday, January 17, 2019 3:39 PM
> To: Konda, Tirumaleswar Reddy <[e-mail]>;
> [e-mail]; [e-mail]; 'Benjamin Kaduk'
> <[e-mail]>; [e-mail]
> Subject: Re: [Dots] AD review of draft-ietf-dots-signal-channel-25 (1st Part)
> 
> This email originated from outside of the organization. Do not click links or
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> 
> 
> 
> > -----Original Message-----
> > From: Dots [mailto: [e-mail]] On Behalf Of Konda,
> > Tirumaleswar Reddy
> > Sent: 17 January 2019 09:33
> > To: [e-mail]; Benjamin Kaduk;
> > draft-ietf-dots-signal- [e-mail]
> > Cc: [e-mail]
> > Subject: Re: [Dots] AD review of draft-ietf-dots-signal-channel-25
> > (1st Part)
> >
> > > -----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)
> > >
> > > This email originated from outside of the organization. Do not click
> > > links or open attachments unless you recognize the sender and know
> > > the content is safe.
> > >
> > > 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.
> 
> How frequently should the client retry when all 4 connection methods fail -
> 10 minutes is excessive to me?

10 minute change is for successful outcome only.

-Tiru

> 
> ~Jon
> 
> >
> > -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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