Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10
Peter Psenak <ppsenak@cisco.com> Fri, 20 March 2020 12:58 UTC
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To: Alvaro Retana <aretana.ietf@gmail.com>, "draft-ietf-isis-mpls-elc@ietf.org" <draft-ietf-isis-mpls-elc@ietf.org>
Cc: "Acee Lindem (acee)" <acee@cisco.com>, "lsr@ietf.org" <lsr@ietf.org>, "lsr-chairs@ietf.org" <lsr-chairs@ietf.org>
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From: Peter Psenak <ppsenak@cisco.com>
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Date: Fri, 20 Mar 2020 13:58:00 +0100
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Subject: Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10
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On 20/03/2020 11:59, Alvaro Retana wrote: > On March 20, 2020 at 6:22:38 AM, Peter Psenak wrote: > > > ... >>> Besides the in-line comments, I want to point out here that this >>> specification is incomplete. It needs to have (1) a formal description of >>> the new MSD-Type (similar to §5/rfc8491), and (2) a discussion of the >>> interaction with the BMI-MSD. >> >> sorry, I missed it. >> >> Entropy Readable Label Depth is defined in rfc8662. >> >> I have modified the text as foolows: >> >> "A new MSD-type [RFC8491], called ERLD-MSD is defined to >> advertise the ERLD [RFC8662] of a given router. A MSD-Type code 2 >> has been assigned by IANA for EARLD-MSD." >> >> Would that be good enough? > > Not quite. According to rfc8662, when a new MSD is defined, the > document MUST indicate the meaning of the absence of the MSD > advertisement. For example, it says this about the BMI-MSD: "The > absence of BMI-MSD advertisements indicates only that the advertising > node does not support advertisement of this capability." ok, I will add that. > > > Also, I need you to talk about the interaction between ERLD-MSD and > BMI-MSD. If both are present, what should happen? Should one take > precedence, should both be ignored, can they coexist without issues??? how are BMI-MSD and EARLD-MSD related? BMI-MSD signals the total number of MPLS labels that can be imposed. EARLD-MSD - is defined as the number of labels a router can both: a. Read in an MPLS packet received on its incoming interface(s) (starting from the top of the stack). b. Use in its load-balancing function. I don't really see why one would affect the other. thanks, Peter > > > Thanks! > > Alvaro. > >
- [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Acee Lindem (acee)
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Acee Lindem (acee)
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Acee Lindem (acee)
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Acee Lindem (acee)
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Peter Psenak
- Re: [Lsr] AD Review of draft-ietf-isis-mpls-elc-10 Alvaro Retana