Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-02
John E Drake <jdrake@juniper.net> Fri, 09 August 2013 16:39 UTC
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From: John E Drake <jdrake@juniper.net>
To: "Zafar Ali (zali)" <zali@cisco.com>, "Matt Hartley (mhartley)" <mhartley@cisco.com>, "CCAMP (ccamp@ietf.org)" <ccamp@ietf.org>
Thread-Topic: [CCAMP] draft-ietf-ccamp-te-metric-recording-02
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Date: Fri, 09 Aug 2013 16:32:30 +0000
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Subject: Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-02
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Zafar, Given that a client has no idea what the TE metric it receives from the server network means, how exactly does this work? Yours Irrespectively, John > -----Original Message----- > From: Zafar Ali (zali) [mailto:zali@cisco.com] > Sent: Friday, August 09, 2013 8:54 AM > To: John E Drake; Matt Hartley (mhartley); CCAMP (ccamp@ietf.org) > Subject: Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-02 > > Hi John: > > Please see in-line. > > Thanks > > Regards Š Zafar > > > -----Original Message----- > From: "jdrake@juniper.net" <jdrake@juniper.net> > Date: Friday, August 9, 2013 11:41 AM > To: "Matt Hartley (mhartley)" <mhartley@cisco.com>, "ccamp@ietf.org" > <ccamp@ietf.org> > Subject: Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-02 > > > > > > >Yours Irrespectively, > > > >John > > > >> -----Original Message----- > >> From: Matt Hartley (mhartley) [mailto:mhartley@cisco.com] > >> Sent: Friday, August 09, 2013 8:07 AM > >> To: John E Drake; CCAMP (ccamp@ietf.org) > >> Cc: Matt Hartley (mhartley) > >> Subject: RE: draft-ietf-ccamp-te-metric-recording-02 > >> > >> John, > >> > >> The point you raise is a good one, but I don't think it has much to > >>do with this draft. > > > >JD: This draft is proposing that the cumulative TE metric associated > >with the establishment of an LSP in the server network be passed to the > >client LSP endpoints. My point is that this is probably useless at best. > > This is all controlled by policy at the client layer and depends on the use cases > of independent vs. dependent costs. > > > > >> > >> > I think there is a basic issue with this draft, which is that the > >> > server network manages its own TE metrics and those metrics almost > >> > certainly have nothing in common with the TE metrics used in a > >> > given > >>client > >> network. > >> > >> So if I understand you correctly, you're just saying that "cost" is a > >>somewhat vague thing that may mean different things to different > >>network operators? > >> This is true sometimes, but that doesn't mean it will always be the > >>case. > > > >JD: You have no way of knowing whether there is any congruence between > >the TE metrics in the server network and the TE metrics in a client > >network. > > This is all controlled by policy at the client layer. > ><snip> > >
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Matt Hartley (mhartley)
- [CCAMP] draft-ietf-ccamp-te-metric-recording-02 John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Igor Bryskin
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Zafar Ali (zali)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Igor Bryskin
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Zafar Ali (zali)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Zafar Ali (zali)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Matt Hartley (mhartley)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Matt Hartley (mhartley)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Matt Hartley (mhartley)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Gert Grammel
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Igor Bryskin
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Zafar Ali (zali)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Igor Bryskin
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… Zafar Ali (zali)
- Re: [CCAMP] draft-ietf-ccamp-te-metric-recording-… John E Drake