[Tsvwg] FW: I-D ACTION:draft-lefaucheur-rsvp-dste-01.txt
"Francois Le Faucheur \(flefauch\)" <flefauch@cisco.com> Tue, 09 November 2004 22:07 UTC
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From: "Francois Le Faucheur (flefauch)" <flefauch@cisco.com>
To: John Drake <jdrake@calient.net>
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Subject: [Tsvwg] FW: I-D ACTION:draft-lefaucheur-rsvp-dste-01.txt
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Hi John, As discussed today, we will bring the next revision of draft-lefaucheur-rsvp-dste in closer alignment with "LSP Hierarchy" draft. In particular, the IF_ID RSVP_HOP object will be used as per "LSP Hierarchy". I think we could also even go for out of band signaling (also as per "LSP Hierarchy"), then we would probably want to do the "checks" to confirm proper out-of-band signaling. Thanks again for your comments. Francois >> -----Original Message----- >> From: John Drake [mailto:jdrake@calient.net] >> Sent: mardi 9 novembre 2004 17:59 >> To: John Drake; Francois Le Faucheur (flefauch) >> Cc: Bruce Davie (bdavie); Francois Le Faucheur (flefauch) >> Subject: RE: I-D ACTION:draft-lefaucheur-rsvp-dste-01.txt >> >> Francois, >> >> I just checked the hierarchy I-D and the two checks you >> mentioned are for >> the out-of-band case. I.e., you want to check that the far >> end of the FA >> LSP is associated with the node that sent you the Path message. >> >> You could probably state in your I-D that for this check >> isn't necessary for >> the in-band case. I don't know if you should mention that a >> node should >> check the FA LSP specified in the IF_ID is the same as the >> LSP in which the >> Path message was received. >> >> Thanks, >> >> John >> >> > > >> -----Original Message----- >> > > >> From: John Drake [mailto:jdrake@calient.net] >> > > >> Sent: lundi 18 octobre 2004 18:20 >> > > >> To: Francois Le Faucheur (flefauch) >> > > >> Cc: Bruce Davie (bdavie); Francois Le Faucheur (flefauch); >> > > >> Carol Iturralde (cei) >> > > >> Subject: RE: I-D ACTION:draft-lefaucheur-rsvp-dste-01.txt >> > > >> >> > > >> Francois, >> > > >> >> > > >> The issue may be a simple as the fact that you don't make it >> > > >> clear that you >> > > >> are using LSP hierarchy as a base and that you don't >> > > >> explicitly detail what >> > > >> the differences are. This makes your I-D read as though it >> > > >> is proposing >> > > >> something different. >> > > >> >> > > >> I would suggest that you include a normative reference to >> > > >> the LSP hierarchy >> > > >> I-D and indicate that its signaling procedures are to be >> > > >> used; in particular >> > > >> that the FA LSP is identified using the IF_ID RSVP_HOP. (I >> > > >> think it would >> > > >> also help if you used its terminology.) >> > > >> >> > > >> Comments inline. >> > > >> >> > > >> Thanks, >> > > >> >> > > >> John >> > > >> >> > > >> > -----Original Message----- >> > > >> > From: Francois Le Faucheur (flefauch) >> [mailto:flefauch@cisco.com] >> > > >> > Sent: Monday, October 18, 2004 8:27 AM >> > > >> > To: John Drake >> > > >> > Cc: Bruce Davie (bdavie); Francois Le Faucheur (flefauch); >> > > >> Carol Iturralde >> > > >> > (cei) >> > > >> > Subject: RE: I-D ACTION:draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> > > >> > Hi John, >> > > >> > >> > > >> > Thanks for checking the document. >> > > >> [John Drake] >> > > >> >> > > >> You're welcome. >> > > >> >> > > >> > >> > > >> > >> -----Original Message----- >> > > >> > >> From: John Drake [mailto:jdrake@calient.net] >> > > >> > >> Sent: vendredi 15 octobre 2004 18:02 >> > > >> > >> To: Francois Le Faucheur (flefauch) >> > > >> > >> Cc: Francois Le Faucheur (flefauch); Bruce Davie (bdavie) >> > > >> > >> Subject: RE: I-D ACTION:draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> >> > > >> > >> Francois, >> > > >> > >> >> > > >> > >> Is there a reason why you couldn't re-use the signaling >> > > >> > >> procedures of the >> > > >> > >> LSP hierarchy I-D? >> > > >> > >> > > >> > This is what we have tried to do. >> > > >> > The LSP hierarchy draft does specify a number of ways to >> > > >> signal from >> > > >> > Aggregate Head to Aggregate Tail. In particular, it >> > > >> discusses one option >> > > >> > that is required for non-packet-capable optical boxes >> > > >> (RSVP out of band) >> > > >> > and one option which can be used for packet-capable boxes >> > > >> (encpasulate >> > > >> > inside tunnel). We use the latter option. >> > > >> [John Drake] >> > > >> >> > > >> That's fine, but it does stipulate that in all cases >> the FA LSP is >> > > >> identified with the IF_ID RSVP_HOP. >> > > >> >> > > >> > >> > > >> > As I said, one necessary difference comes from the fact >> > > >> that RSVP uses >> > > >> > final destination while RSVP-TE uses ERO. But as you say >> > > >> below, that >> > > >> > doesn't affect things once it is encapsulated. >> > > >> > >> > > >> > >>If the Path message is tunneled from head-end to >> > > >> > >> tail-end, as described in LSP hierarchy I-D, it doesn't >> > > >> > >> matter what is in >> > > >> > >> the destination address field of tunneled IP packet. >> > > >> > >> Also, >> > > >> > >> in checking with >> > > >> > >> Lou Berger, it seems that all RSVP-TE >> implementations place >> > > >> > >> the next hop >> > > >> > >> address in the destination address field. >> > > >> > >> > > >> > Agreed. >> > > >> > Which is why we see a small difference in how to handle >> > > >> aggregation of >> > > >> > end-to-end RSVP from that viewpoint. >> > > >> > >> > > >> > >> >> > > >> > >> It seems to me that having multiple ways of doing the >> > > >> same thing is >> > > >> > >> counter-productive. >> > > >> > >> Also, in section 5, you seem to be recommending that your >> > > >> > >> procedures, rather >> > > >> > >> than the procedures of the LSP hierarchy I-D, be used for >> > > >> > >> LSP hierarchy. >> > > >> > >> > > >> > We are not trying to introduce any change over LSP >> > > >> hierarchy. Again, we >> > > >> > think the behavior is in line with LSP hiererachy >> draft wherever >> > > >> > possible and only differs for what is specific to RSVP >> > > >> end-to-end flows. >> > > >> > Please let us know if you see specific aspects which would >> > > >> be departing >> > > >> > from LSP hierarchy and which could be brought back in line. >> > > >> > >> > > >> > Thanks >> > > >> > >> > > >> > Francois >> > > >> > >> > > >> > >> > > >> > >> >> > > >> > >> Thanks, >> > > >> > >> >> > > >> > >> John >> > > >> > >> >> > > >> > >> > -----Original Message----- >> > > >> > >> > From: Francois Le Faucheur (flefauch) >> > > >> [mailto:flefauch@cisco.com] >> > > >> > >> > Sent: Friday, October 15, 2004 3:31 AM >> > > >> > >> > To: John Drake >> > > >> > >> > Cc: Francois Le Faucheur (flefauch); Bruce >> Davie (bdavie) >> > > >> > >> > Subject: RE: I-D >> ACTION:draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> > >> > > >> > >> > Hi John, >> > > >> > >> > >> > > >> > >> > Thanks for the note. Yes, we are aware of that draft >> > > >> and also see a >> > > >> > >> > number of commonalities. In fact, in section >> 5, we point >> > > >> > >> out that one of >> > > >> > >> > the applicable scenario is the one where the end-to-end >> > > >> > >> reservations are >> > > >> > >> > RSVP-TE tunnel reservations as per lsp-hiererachy. >> > > >> > >> > However, the prime focus of the rsvp-dste draft is, >> > > >> of course, the >> > > >> > >> > aggregation of regular RSVP reservations and its >> > > >> > >> applicablity to CAC for >> > > >> > >> > voice. One of the related aspect is that RSVP-TE >> > > >> > >> reservations use ERO >> > > >> > >> > while regular RSVP Path uses final destination >> addresses. >> > > >> > >> This makes it >> > > >> > >> > much more natural with regular RSVP to encapuslate the >> > > >> > >> Path inside the >> > > >> > >> > tunnel, than with lsp-hiererachy where Path message >> > > >> can be forwrded >> > > >> > >> > out-of-band to the Tunnel tail. >> > > >> > >> > >> > > >> > >> > Looking forward to hearing more comments >> > > >> > >> > >> > > >> > >> > Francois >> > > >> > >> > >> > > >> > >> > >> -----Original Message----- >> > > >> > >> > >> From: John Drake [mailto:jdrake@calient.net] >> > > >> > >> > >> Sent: jeudi 14 octobre 2004 23:05 >> > > >> > >> > >> To: Francois Le Faucheur (flefauch) >> > > >> > >> > >> Subject: FW: I-D >> ACTION:draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> > >> >> > > >> > >> > >> Francois, >> > > >> > >> > >> >> > > >> > >> > >> Are you aware of the following I-D: >> > > >> > >> > >> >> > > >> > >> > >> >> > > >> http://www.ietf.org/internet-drafts/draft-ietf-mpls-lsp-hiera >> > > >> > >> > >> rchy-08.txt >> > > >> > >> > >> >> > > >> > >> > >> I think there's a fair amount of overlap between >> > > >> it and your >> > > >> > >> > >> draft, below, >> > > >> > >> > >> which I just skimmed. (And which I'll read >> more thoroughly >> > > >> > >> > >> later this >> > > >> > >> > >> week.) >> > > >> > >> > >> >> > > >> > >> > >> Thanks, >> > > >> > >> > >> >> > > >> > >> > >> John >> > > >> > >> > >> >> > > >> > >> > >> -----Original Message----- >> > > >> > >> > >> From: Internet-Drafts@ietf.org >> > > >> [mailto:Internet-Drafts@ietf.org] >> > > >> > >> > >> Sent: Thursday, October 14, 2004 1:18 PM >> > > >> > >> > >> To: i-d-announce@ietf.org >> > > >> > >> > >> Subject: I-D >> ACTION:draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> > >> >> > > >> > >> > >> A New Internet-Draft is available from the on-line >> > > >> > >> Internet-Drafts >> > > >> > >> > >> directories. >> > > >> > >> > >> >> > > >> > >> > >> >> > > >> > >> > >> Title : Aggregation of RSVP >> > > >> > >> Reservations over MPLS >> > > >> > >> > >> TE/DS-TE >> > > >> > >> > >> Tunnels >> > > >> > >> > >> Author(s) : F. Le Faucheur, et al. >> > > >> > >> > >> Filename : >> draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> > >> Pages : 18 >> > > >> > >> > >> Date : 2004-10-14 >> > > >> > >> > >> >> > > >> > >> > >> This document provides specification for >> aggregation of >> > > >> > >> RSVP end-to- >> > > >> > >> > >> end reservations over MPLS Traffic >> Engineering (TE) >> > > >> > >> > >> tunnels or MPLS >> > > >> > >> > >> Diffserv-aware MPLS Traffic Engineering (DS-TE) >> > > >> Tunnels. This >> > > >> > >> > >> approach is based on RFC 3175 and simply >> modifies the >> > > >> > >> > >> corresponding >> > > >> > >> > >> procedures for operations over MPLS TE tunnels >> > > >> instead of >> > > >> > >> > >> aggregated >> > > >> > >> > >> RSVP reservations. This approach can be used to >> > > >> > >> achieve admission >> > > >> > >> > >> control of a very large number of flows >> in a scalable >> > > >> > >> > >> manner since >> > > >> > >> > >> the devices in the core of the network are >> > > >> unaware of the >> > > >> > >> > >> end-to-end >> > > >> > >> > >> RSVP reservations and are only aware of the >> > > >> MPLS TE tunnels. >> > > >> > >> > >> >> > > >> > >> > >> A URL for this Internet-Draft is: >> > > >> > >> > >> >> > > >> > >> >> > > >> >> http://www.ietf.org/internet-drafts/draft-lefaucheur-rsvp-dste-01.txt >> > > >> > >> > >> >> > > >> > >> > >> To remove yourself from the I-D >> Announcement list, send >> > > >> > >> a message to >> > > >> > >> > >> i-d-announce-request@ietf.org with the word >> unsubscribe in >> > > >> > >> > >> the body of the >> > > >> > >> > >> message. >> > > >> > >> > >> You can also visit >> > > >> > >> > >> https://www1.ietf.org/mailman/listinfo/I-D-announce >> > > >> > >> > >> to change your subscription settings. >> > > >> > >> > >> >> > > >> > >> > >> >> > > >> > >> > >> Internet-Drafts are also available by >> anonymous FTP. 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- [Tsvwg] FW: I-D ACTION:draft-lefaucheur-rsvp-dste… Francois Le Faucheur (flefauch)
- [Tsvwg] RE: I-D ACTION:draft-lefaucheur-rsvp-dste… John Drake