Re: [Detnet] [mpls] FW: New Version Notification for draft-jags-mpls-ps-mna-hdr-00.txt
John E Drake <[email protected]> Thu, 20 Apr 2023 16:47:43 +0000
| Newsgroups | gmane.ietf.pwe3,gmane.ietf.mpls |
|---|---|
| Message-ID | <[email protected]> |
Greg, I’m sorry, I didn’t express myself properly. My point was simply that MNA has functionality that is more general and fundamentally different from pseudo-wires, so to me we shouldn’t use an encoding that ties us to them. Sent from my iPhone On Apr 20, 2023, at 12:40 PM, Greg Mirsky <[email protected]> wrote: [External Email. Be cautious of content] John, I didn't know that PSD MNA is not applicable to PW or DetNet MPLS. Can you point me to where that is states in the MNA framework draft or elsewhere? I was under impression that MNA is equally applicable to any type of MPLS. Am I missing something? Regards, Greg On Thu, Apr 20, 2023, 6:32 PM John E Drake <[email protected]<mailto:[email protected]>> wrote: Greg, Why would we want to have anything to do with pseudo-wires, which have nothing to do with MNA? Sent from my iPhone On Apr 20, 2023, at 11:27 AM, Greg Mirsky <[email protected]<mailto:[email protected]>> wrote: [External Email. Be cautious of content] Hi Tony, I wonder if a new value for the first nibble is necessary. Could PSD use an existing one that has a version numbering in the following it bits? For example, PW ACH, i.e., 0b001? That is how the DetNet OAM in MPLS decided to define its header, different from the PW ACH format. Would using a new Version in the PW ACH help PSD MNA? But I am not clear how PSD MNA works for PW with PW CW or DetNet MPLS with d-CW. Would the authors of the draft be working on that? Regards, Greg On Thu, Apr 20, 2023, 5:10 PM Tony Li <[email protected]<mailto:[email protected]>> wrote: Hi Loa, I don’t understand your question. Please recall that we have to deal with legacy implementations. We need PSD quickly and efficiently found by implementations that support MNA. The pointer in ISD helps with that. We also need to ensure that MNA PSD is not confused with other PSD usages. The new first nibble is a requirement for that. Tony > On Apr 20, 2023, at 2:20 AM, Loa Andersson <[email protected]<mailto:[email protected]>> wrote: > > Authors, Working Group, > > It is is a mystery to me why adding a new first nibble that is not precise, rather than to trust the the P-bit in the LSE following the MNA label: > > 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 0 1 2 3 4 5 6 7 > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > | Opcode | Data |P|IHS|S| Res |U| NASL | > +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ > > which give you a precise pointer to the PSD, is not considered "cleaner" than trusting the first nibble. > > /Loa > > On 2023-03-28 22:58, Rakesh Gandhi wrote: >> Hi Loa, >> We, authors, feel that having a new first Nibble IANA assigned would be a cleaner solution, but we also like to hear from the other side of the house. >> Thanks, >> Rakesh >> On Fri, Mar 17, 2023 at 3:56 AM Loa Andersson <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>> wrote: >> Rakesh, >> Thanks for response, I'd like to point out >> - the first nibble is never on its own a sufficient indication for what >> the payload a a packet is, it might be an Ethernet PW without >> control >> word, where the first nibble accidentally is a value that we >> assigned >> for some payload. >> - something more is needed to with sufficient accuracy understand what >> the payload is, for PSD this is the P-bit in the OpCode LSE. >> - actually the the P-bit in the OpCode LSE is sufficient in itself, we >> don't need the first nibble, unless we for some reason want both >> brace and waist belt, but I can't see why >> - first nibbles is a scarce resource that should only be allocated if we >> really need it. >> Maybe someone from the the pseudo wire side of the house can confirm >> this. >> /Loa >> On 2023-03-15 13:16, Rakesh Gandhi wrote: >> > Hi Loa, >> > >> > Authors discussed the first nibble after BOS. >> > Re-using any existing Nibble (e.g. 0000b for CW or 0001b for >> G-ACH) can >> > lead to backwards compatibility issues on the legacy devices. >> > Note that legacy devices may not support MNA sub-stack. >> > It would be good to assign a new nibble (e.g., 0x2 = 0010b, >> currently >> > not assigned) to avoid such issues. >> > We can agree on this (i.e. assigning a new nibble for PSD), we can >> > update the draft accordingly. >> > >> > thanks, >> > Rakesh >> > >> > >> > >> > >> > On Fri, Mar 10, 2023 at 9:40 AM Loa Andersson >> <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> > <mailto:[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>>> wrote: >> > >> > All, >> > >> > I have a question that is not new, and I’m still uncertain >> what the >> > correct answer is. >> > >> > I’m not certain that we should consider “the first nibble” as >> part >> > of the MNA PSD. Admittedly it is part of PSD, but not part of the >> > MNA PSD. >> > >> > We could say that MNA PSD start after the first nibble. If the >> > PSD-bit is set in the MNA-label LSE, we can safely ignore the >> first >> > nibble, if it is not set we need to look at the first nibble, and >> > the data following the first nibble is not MNA ancillary data. >> > >> > I see no meed to define a PSD first nibble. It would also avoid a >> > potential ambiguity in using the Generic Associated Channel >> nibble. >> > >> > For MNA the first should be set to 0000b when sent, and >> ignored when >> > received. >> > >> > /Loa >> > >> > Sent from my iPhone >> > >> >> On 10 Mar 2023, at 13:59, Jaganbabu Rajamanickam (jrajaman) >> >> <[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>> >> >> <mailto:[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>>>> wrote: >> >> >> >> >> >> >> >> Hello Everyone,____ >> >> >> >> __ __ >> >> >> >> We like to introduce our new draft on Post-Stack MNA >> solution.____ >> >> >> >> Welcome your review comments and suggestions.____ >> >> >> >> __ __ >> >> >> >> Thanx,____ >> >> >> >> Jags____ >> >> >> >> __ __ >> >> >> >> *From: *[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>> <mailto:[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>>> >> >> <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> <mailto:[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>>> >> >> *Date: *Friday, March 10, 2023 at 7:52 AM >> >> *To: *Jaganbabu Rajamanickam (jrajaman) <[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>> >> >> <mailto:[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>>>, >> Jie Dong <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> >> <mailto:[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>>>, >> Rakesh Gandhi (rgandhi) >> >> <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> <mailto:[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>>>, Royi Zigler >> >> <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> <mailto:[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>>>>, Tony >> >> Li <[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> <mailto:[email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>>>> >> >> *Subject: *New Version Notification for >> >> draft-jags-mpls-ps-mna-hdr-00.txt____ >> >> >> >> >> >> A new version of I-D, draft-jags-mpls-ps-mna-hdr-00.txt >> >> has been successfully submitted by Jaganbabu Rajamanickam and >> >> posted to the >> >> IETF repository. >> >> >> >> Name: draft-jags-mpls-ps-mna-hdr >> >> Revision: 00 >> >> Title: Post-Stack MPLS Network Action (MNA) Solution >> >> Document date: 2023-03-10 >> >> Group: Individual Submission >> >> Pages: 17 >> >> URL: >> >> >> https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ4AfI4o2$> >> <https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ4AfI4o2$>> >> >> <https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ4AfI4o2$> >> <https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.txt__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ4AfI4o2$>>> >> >> Status: >> >> https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ2sHFVBC$> >> <https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ2sHFVBC$>> >> >> <https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ2sHFVBC$> >> <https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/draft-jags-mpls-ps-mna-hdr/__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ2sHFVBC$>>> >> >> Html: >> >> >> https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJyGuCAzZ$> >> <https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJyGuCAzZ$>> >> >> <https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJyGuCAzZ$> <https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html<https://urldefense.com/v3/__https://www.ietf.org/archive/id/draft-jags-mpls-ps-mna-hdr-00.html__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJyGuCAzZ$>>> >> >> Htmlized: >> >> https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ1iGDL2S$> >> <https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ1iGDL2S$>> >> >> <https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ1iGDL2S$> >> <https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr<https://urldefense.com/v3/__https://datatracker.ietf.org/doc/html/draft-jags-mpls-ps-mna-hdr__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ1iGDL2S$>>> >> >> >> >> >> >> Abstract: >> >> This document defines the Post-Stack MPLS Network Action >> (MNA) >> >> solution for carrying Network Actions and Ancillary Data >> after the >> >> MPLS label stack based on In-Stack MNA solution defined >> in draft- >> >> ietf-mpls-mna-hdr. MPLS Network Actions can be used to >> influence >> >> packet forwarding decisions, carry additional OAM information >> >> in the >> >> MPLS packet or perform user-defined operations. This >> document >> >> addresses the MNA requirements specified in >> draft-ietf-mpls-mna- >> >> requirements. This document follows the MNA framework >> specified in >> >> draft-ietf-mpls-mna-fwk. >> >> >> >> >> >> >> >> >> >> The IETF Secretariat >> >> >> >> ____ >> >> >> >> _______________________________________________ >> >> mpls mailing list >> >> [email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> <mailto:[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>>> >> >> https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$> >> <https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$>> >> >> <https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$> >> <https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$>>> >> > _______________________________________________ >> > mpls mailing list >> > [email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> <mailto:[email protected]<mailto:[email protected]> >> <mailto:[email protected]<mailto:[email protected]>>> >> > https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$> >> <https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$>> >> > <https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$> >> <https://www.ietf.org/mailman/listinfo/mpls<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/mpls__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6vq-fR5$>>> >> > >> > >> > _______________________________________________ >> > Pals mailing list >> > [email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> > https://www.ietf.org/mailman/listinfo/pals<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/pals__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6r2gKLV$> >> <https://www.ietf.org/mailman/listinfo/pals<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/pals__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ6r2gKLV$>> >> -- Loa Andersson email: [email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> Senior MPLS Expert [email protected]<mailto:[email protected]> <mailto:[email protected]<mailto:[email protected]>> >> Bronze Dragon Consulting phone: +46 739 81 21 64 > > -- > Loa Andersson email: [email protected]<mailto:[email protected]> > Senior MPLS Expert [email protected]<mailto:[email protected]> > Bronze Dragon Consulting phone: +46 739 81 21 64 _______________________________________________ detnet mailing list [email protected]<mailto:[email protected]> https://www.ietf.org/mailman/listinfo/detnet<https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/detnet__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ4fP8_4N$> _______________________________________________ detnet mailing list [email protected]<mailto:[email protected]> https://urldefense.com/v3/__https://www.ietf.org/mailman/listinfo/detnet__;!!NEt6yMaO-gk!GUv0fvZp1smanNLND8vxUe_yRwAsN-tAd2a1TfrpawcVDd41GJGWkyT_Ge8jrz4ky6r5Hl_Tr4gwJ4fP8_4N$ _______________________________________________ Pals mailing list [email protected] https://www.ietf.org/mailman/listinfo/pals