Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd working grouplast call o
<hideki.endo.es@hitachi.com> Wed, 13 March 2013 22:31 UTC
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Subject: Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd working grouplast call o
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Sharam, Very simple question. >Assume there are 2 ingress interfaces A & B. Each interface maps Ethernet traffic >to its own PW (PW-A and PW-B). Now assume both these PWs go inside the same LSP that exists Interface C. Why is this assumption mandatory? "Assume there are 1 ingress interfaces A. Two VLAN flows in the interface A are mapped to different PWs (PW-A and PW-B). Now assume both these PWs go inside the same LSP." In this case, UP-MEP of the LSP can be at interface A, right? Thanks, Hideki Endo >Greg, > >RFC6371 is very high level and does not define whether UP MEP applies to LSP or PW. Assume there are 2 ingress interfaces A & B. Each interface maps Ethernet traffic to its own PW (PW-A and PW-B). Now assume both these PWs go inside the same LSP that exists Interface C. Now please explain if we were to have an UP-MEP for LSP then on which interface would that LSP UP-MEP reside? Interface A? B? C? > >This simple example shows you can't have an LSP UP-MEP. > >Thx >SD > >From: Gregory Mirsky [mailto:gregory.mirsky@ericsson.com] >Sent: Tuesday, March 12, 2013 11:56 AM >To: Shahram Davari; hideki.endo.es@hitachi.com >Cc: mpls@ietf.org; mpls-chairs@tools.ietf.org; draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org; mpls-ads@tools.ietf.org >Subject: On Up and Down MEP in MPLS-TP (RE: [mpls] 2nd working group last call ondraft-ietf-mpls-tp-mip-mep-map) > >Dear All, >What would be the most appropriate subject to continue this discussion? I'll give it a try, please feel free to change it. > >I think that there's nothing that can preclude from supporting UP MEP on MPLS-TP LSP, according to UP MEP definition of RFC 6371, even when multpiple PWs mapped to that LSP. Same, I think, is the true for p2mp PW. Note that service, VPWS, is not part of MPLS-TP architecture. > > Regards, > Greg > >-----Original Message----- >From: mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org> [mailto:mpls-bounces@ietf.org] On Behalf Of Shahram Davari >Sent: Tuesday, March 12, 2013 11:30 AM >To: hideki.endo.es@hitachi.com<mailto:hideki.endo.es@hitachi.com> >Cc: mpls@ietf.org<mailto:mpls@ietf.org>; mpls-chairs@tools.ietf.org<mailto:mpls-chairs@tools.ietf.org>; draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org<mailto:draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org>; mpls-ads@tools.ietf.org<mailto:mpls-ads@tools.ietf.org> >Subject: Re: [mpls] 2nd working group last call ondraft-ietf-mpls-tp-mip-mep-map > >Hideki, > >So far no RFC or draft has talked about Down or UP MEP for LSPs. But if you think about it logically LSPs can't have UP-MEP because LSP can carry many PWs and each PW may enter the LSP from a different port/interface. PWs can have UP-MEP but only for P2P services (VPWS), otherwise they can't have UP-MEP either (same as LSP). > >My suggestion is to correct figures and change UP-MEPs to Down-MEPs for LSPs. Also to mention UP-MEP is out of scope. > >Thx >SD > >-----Original Message----- >From: hideki.endo.es@hitachi.com<mailto:hideki.endo.es@hitachi.com> [mailto:hideki.endo.es@hitachi.com] >Sent: Tuesday, March 12, 2013 11:20 AM >To: Shahram Davari >Cc: loa@pi.nu<mailto:loa@pi.nu>; mpls@ietf.org<mailto:mpls@ietf.org>; mpls-ads@tools.ietf.org<mailto:mpls-ads@tools.ietf.org>; mpls-chairs@tools.ietf.org<mailto:mpls-chairs@tools.ietf.org>; draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org<mailto:draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org> >Subject: Re:Re: [mpls] 2nd working group last call ondraft-ietf-mpls-tp-mip-mep-map > >Hi Shahram, > >Just one comment. > >>I would also argue that LSPs can't have UP-MEPs, since PWs from many ingress ports can enter an LSP and therefore the LSP can't start on the ingress interface. > >I think this depends on implementations. >Any RFC don't restrict to DOWN-MEPs in an LSP. > >Anyway, MEP mechanism is out of scope in this draft as you said. > >Thanks, >Hideki Endo > >>Hi, >> >>Although I mentioned I am Ok with the draft to be advanced to RFC, but after reviewing it in more details it appears that the draft, in spite of its name, does talk about UP-MEP at all and only talks about UP-MIP, while the figures show UP-MEPs for LSPs. Even if the scope of the draft is UP-MIP, considering that there can't be a MIP without a MEP, the draft should have some wording regarding UP-MEPs and their applicability to LSPs and PWs. I would also argue that LSPs can't have UP-MEPs, since PWs from many ingress ports can enter an LSP and therefore the LSP can't start on the ingress interface. >> >>A quick fix at this point is to mention UP-MEP is out of scope and change the figures to only show Down-MEPs. A better fix is to elaborate on UP-MEP and its applicability and placement, etc. >> >>Regards, >>Shahram >> >> >> >>-----Original Message----- >>From: mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org> [mailto:mpls-bounces@ietf.org] On Behalf Of >>Shahram Davari >>Sent: Wednesday, March 06, 2013 11:30 AM >>To: Loa Andersson; mpls@ietf.org<mailto:mpls@ietf.org> >>Cc: <mpls-ads@tools.ietf.org<mailto:mpls-ads@tools.ietf.org>>; mpls-chairs@tools.ietf.org<mailto:mpls-chairs@tools.ietf.org>; >>draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org<mailto:draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org> >>Subject: Re: [mpls] 2nd working group last call on >>draft-ietf-mpls-tp-mip-mep-map >> >>My Comments are addressed and I support this draft to be published as Informational RFC. >> >>Thx >>Shahram >> >>-----Original Message----- >>From: mpls-bounces@ietf.org<mailto:mpls-bounces@ietf.org> [mailto:mpls-bounces@ietf.org] On Behalf Of >>Loa Andersson >>Sent: Tuesday, February 26, 2013 3:02 AM >>To: mpls@ietf.org<mailto:mpls@ietf.org> >>Cc: <mpls-ads@tools.ietf.org<mailto:mpls-ads@tools.ietf.org>>; mpls-chairs@tools.ietf.org<mailto:mpls-chairs@tools.ietf.org>; >>draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org<mailto:draft-ietf-mpls-tp-mip-mep-map@tools.ietf.org> >>Subject: [mpls] 2nd working group last call on >>draft-ietf-mpls-tp-mip-mep-map >> >>Working Group, >> >>draft-ietf-mpls-tp-mip-mep-map-05.txt has been updated after a previous >>last call, due to the nature a and extent of the updates we have chosen >>to start a 2nd wg last call. >> >>The IETF datatracker status page for this draft is: >>https://datatracker.ietf.org/doc/draft-ietf-mpls-tp-mip-mep-map >> >>There's also a htmlized version available at: >>http://tools.ietf.org/html/draft-ietf-mpls-tp-mip-mep-map-05 >> >>A diff from the previous version is available at: >>http://www.ietf.org/rfcdiff?url2=draft-ietf-mpls-tp-mip-mep-map-05 >> >>Please send your comments, including approval of the documents and the >>updates to the mpls working group list (mpls@ietf.org<mailto:mpls@ietf.org>) >> >>This working group last call ends March 13, 2013. >> >>/Loa >>for the MPLS working group co-chairs >>-- >> >> >>Loa Andersson email: loa@mail01.huawei.com<mailto:loa@mail01.huawei.com> >>Senior MPLS Expert loa@pi.nu<mailto:loa@pi.nu> >>Huawei Technologies (consult) phone: +46 739 81 21 64 >>_______________________________________________ >>mpls mailing list >>mpls@ietf.org<mailto:mpls@ietf.org> >>https://www.ietf.org/mailman/listinfo/mpls >> >> >>_______________________________________________ >>mpls mailing list >>mpls@ietf.org<mailto:mpls@ietf.org> >>https://www.ietf.org/mailman/listinfo/mpls >> >> >>_______________________________________________ >>mpls mailing list >>mpls@ietf.org<mailto:mpls@ietf.org> >>https://www.ietf.org/mailman/listinfo/mpls >> > > >_______________________________________________ >mpls mailing list >mpls@ietf.org<mailto:mpls@ietf.org> >https://www.ietf.org/mailman/listinfo/mpls > >
- [mpls] 2nd working group last call on draft-ietf-… Loa Andersson
- Re: [mpls] 2nd working group last call on draft-i… hideki.endo.es
- Re: [mpls] 2nd working group last call on draft-i… Shahram Davari
- Re: [mpls] 2nd working group last call on draft-i… Pablo Frank
- Re: [mpls] 2nd working group last call on draft-i… Shahram Davari
- Re: [mpls] 2nd working group last call ondraft-ie… hideki.endo.es
- Re: [mpls] 2nd working group last call ondraft-ie… Shahram Davari
- [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd wor… Gregory Mirsky
- Re: [mpls] 2nd working group last call on draft-i… Rolf Winter
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Zhenlong Cui
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Gregory Mirsky
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Gregory Mirsky
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Zhenlong Cui
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Gregory Mirsky
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… hideki.endo.es
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Gregory Mirsky
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… hideki.endo.es
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Gregory Mirsky
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] 2nd working group last call on draft-i… Loa Andersson
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… hideki.endo.es
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE: 2nd… Pablo Frank
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE:2ndw… hideki.endo.es
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE:2ndw… Shahram Davari
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE:2ndw… Gregory Mirsky
- Re: [mpls] On Up and Down MEP in MPLS-TP (RE:2ndw… Shahram Davari