Re: [CCAMP] WG Last Call comments on draft-ietf-ccamp-gmpls-signaling-g709v3-04
Lou Berger <lberger@labn.net> Wed, 23 January 2013 15:08 UTC
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Date: Wed, 23 Jan 2013 10:08:06 -0500
From: Lou Berger <lberger@labn.net>
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To: Fatai Zhang <zhangfatai@huawei.com>
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Cc: CCAMP <ccamp@ietf.org>, "draft-ietf-ccamp-gmpls-signaling-g709v3@tools.ietf.org" <draft-ietf-ccamp-gmpls-signaling-g709v3@tools.ietf.org>
Subject: Re: [CCAMP] WG Last Call comments on draft-ietf-ccamp-gmpls-signaling-g709v3-04
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Fatai, On 1/23/2013 6:49 AM, Fatai Zhang wrote: > Hi Lou, > > For ODUflex(CBR), the formula is from [G.709-2012] and it has been > discussed before, so please trust that there is no opportunity for > misinterpretation. (Note that there are two cases, one is > ODUflex(CBR) and another one is ODUflex(GFP)). > > In addtion, ODUflex cannot be concatenated by [G.709-2012]. Thanks for confirming my understanding. This raises the question of if the new traffic should just apply to ODUFlex? Correct me if I'm wrong, but I believe the [RFC4328] is sufficient in all other cases. This may also make it easier for early implementations of the draft as then they can limit code changes from the (-03) rev to only ODUflex LSPs. Just to be clear, I'm really just *asking* about this. As I said before, I'm open on specifics... Any thoughts/comments? Authors? Implementors? Thanks, Lou > I will issue a new version tomorrow to capture all your comments. > > > Best Regards > > Fatai > > > -----Original Message----- > From: Lou Berger [mailto:lberger@labn.net] > Sent: Wednesday, January 23, 2013 2:11 AM > To: Fatai Zhang > Cc: CCAMP; draft-ietf-ccamp-gmpls-signaling-g709v3@tools.ietf.org > Subject: Re: [CCAMP] WG Last Call comments on draft-ietf-ccamp-gmpls-signaling-g709v3-04 > > Fatai, > > On 1/20/2013 9:43 PM, Fatai Zhang wrote: >> Hi Lou, >> >> You said: >>> but you're says encoded as (N*Nominal Rate) right? Wat's the value of this vs just carrying N? >> >> [Fatai] The original way (in version 04&05) is putting (N* Nominal >> Rate) in "Bit_Rate" field for ODUflex(GFP), the value is that we can >> generalize to just use one single "Bit_Rate" field to carry IEEE >> float number for both cases, it seems that you don't agree on this >> value, :-) > > I've seen differences in calculated floating point values from different > implementations, so I just want to ensure that such cases are avoided. > I'm open to specific solutions and certainly will deffer on the > specifics assuming there is no opportunity for misinterpretation/interop > issues. I don't think the original passed this threshold, i.e.,: > > N = Ceiling of > > ODUflex(CBR) nominal bit rate * (1 + ODUflex(CBR) bit rate tolerance) > --------------------------------------------------------------------- > ODTUk.ts nominal bit rate * (1 - HO OPUk bit rate tolerance) > >> . Therefore, I (was) am saying that I am going to accept >> your suggestion to carry N for ODUflex(GFP). We are discussing where >> to put N for ODUflex(GFP). >> > >> You said: >>> bits in the control plane are generally cheap, IMO it's better to have simpler encoding than to optimize every bit (or 8 in this case). >> >> [Fatai] OK, I will add a new field (to occupy the reserved bits) to carry N. > > As you see fit. > > Just to clarify my understanding, ODUflex and Virtual concatenation can > never be combined for the same signal type/level, right? (Although an > ODUflex client signal could be carried over a virtual concatenated > ODUk). Is this correct or did I miss something in G709? > > Thanks, > Lou > >> >> >> >> Best Regards >> >> Fatai >> >> -----Original Message----- >> From: Lou Berger [mailto:lberger@labn.net] >> Sent: Friday, January 18, 2013 1:42 AM >> To: Fatai Zhang >> Cc: CCAMP; draft-ietf-ccamp-gmpls-signaling-g709v3@tools.ietf.org >> Subject: Re: [CCAMP] WG Last Call comments on draft-ietf-ccamp-gmpls-signaling-g709v3-04 >> >> >> >> On 1/15/2013 10:16 PM, Fatai Zhang wrote: >>> Hi Lou, >>> >>> To avoid misunderstanding, I would like to clarify more on the >>> following point. >>> >>> >>>>>>> It is better to have consistent format and the same meaning of one >> field for both ODUflex(CBR) and GFP. This is why we have section 5.1 >> &5.2 to describe the complex stuff. >>>>>> I actually wasn't suggesting that N be carried in the bit rate field. >>>>>> The bit rate field can either be set as described or to zero (i.e., >>>>>> ignored). At the time, I was thinking about carrying N in the reserved >>>>>> field. But perhaps the right place is MT, if my understanding is right >>>>>> (would always be 1 otherwise). I'm open to either... >>>>>> >>>>> [Fatai] Why not just use "bit rate"field to carry "N"because "N" >>>>> implies bit rate? I am OK if you like to use a new filed (like "TS >>>>> Number") to occupy the reserved field even though that I prefer the >>>>> original approach (ie., use "bit rate"field to carry "N"). >>>> >>>> Are you proposing dropping carrying bit rates represented as an IEEE >>>> floating point and just carrying N for ODUflex? This seems workable to >>>> me, but we should ensure that there are no significant objections. >>> >>> [Fatai] There are two usages for " Bit_Rate " field as described in the >>> lines 287-310. >>> >>> (1) For ODUflex(CBR), the Bit_Rate field indicates the nominal bit >>> rate of ODUflex(CBR) expressed in bytes per second, encoded as a 32-bit >>> IEEE single precision floating-point number. For this case, we MUST use >>> 32-bit IEEE floating point instead of "N"(Please see more in section 5.1). >> >> I guess you really still need (to be based on) the client signal rate at >> the edges. >> >>> >>> (2) For ODUflex(GFP), we can change the text (the lines from 305 to >>> 310) based on your suggestion, ie., the Bit_Rate field is used to carry >>> "N"to indicate the nominal bit rate of the >>> ODUflex(GFP). >> >> but you're says encoded as (N*Nominal Rate) right? Wat's the value of >> this vs just carrying N? >> >> >>> >>> Therefore, I am proposing using one single filed ("Bit_Rate ") for these >>> two cases, in this way, we can leave the "Reserved" bits for future. >> >> bits in the control plane are generally cheap, IMO it's better to have >> simpler encoding than to optimize every bit (or 8 in this case). >> >> Lou >> >>> >>> Hope we are now at the same page. >>> >>> >>> Best Regards >>> >>> Fatai >> >> >> >> > > > >
- [CCAMP] WG Last Call: g709-framework, g709-info-m… Lou Berger
- [CCAMP] WG Last Call comments on draft-ietf-ccamp… Lou Berger
- [CCAMP] WG Last Call comments on draft-ietf-ccamp… Lou Berger
- [CCAMP] WG Last Call comments on draft-ietf-ccamp… Lou Berger
- [CCAMP] WG Last Call comments on draft-ietf-ccamp… Lou Berger
- [CCAMP] 答复: WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] WG Last Call: g709-framework, g709-in… Lou Berger
- [CCAMP] 答复: WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] 答复: WG Last Call comments on draft-ie… Lou Berger
- [CCAMP] 答复: 答复: WG Last Call comments on draft-ie… Fatai Zhang
- Re: [CCAMP] 答复: 答复: WG Last Call comments on draf… Lou Berger
- Re: [CCAMP] 答复: 答复: WG Last Call comments on draf… BRUNGARD, DEBORAH A
- [CCAMP] Fwd: Re: 答复: 答复: WG Last Call comments on… Huub van Helvoort
- [CCAMP] 答复: 答复: 答复: WG Last Call comments on draf… Fatai Zhang
- [CCAMP] 答复: 答复: 答复: WG Last Call comments on draf… Fatai Zhang
- Re: [CCAMP] 答复: 答复: 答复: WG Last Call comments on … Lou Berger
- [CCAMP] 答复: 答复: 答复: 答复: WG Last Call comments on … Fatai Zhang
- Re: [CCAMP] 答复: 答复: 答复: 答复: WG Last Call comments… Lou Berger
- [CCAMP] 答复: 答复: 答复: 答复: 答复: WG Last Call comments… Fatai Zhang
- [CCAMP] 答复: WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] 答复: WG Last Call comments on draft-ie… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Gruman, Fred
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… John E Drake
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Zafar Ali (zali)
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Zafar Ali (zali)
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Daniele Ceccarelli
- [CCAMP] Poll on ODUFlex-related encoding (was: WG… Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Zafar Ali (zali)
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Gruman, Fred
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Daniele Ceccarelli
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Gruman, Fred
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Gruman, Fred
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Lou Berger
- [CCAMP] Fwd: RE: Poll on ODUFlex-related encoding… Lou Berger
- Re: [CCAMP] WG Last Call comments on draft-ietf-c… Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Khuzema Pithewan
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Daniele Ceccarelli
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Fatai Zhang
- [CCAMP] R: Poll on ODUFlex-related encoding (was:… BELOTTI, SERGIO (SERGIO)
- [CCAMP] R: Poll on ODUFlex-related encoding (was:… BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Rajan Rao
- Re: [CCAMP] Poll on ODUFlex-related encoding (was… Margaria, Cyril (NSN - DE/Munich)
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Daniele Ceccarelli
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- [CCAMP] R: Poll on ODUFlex-related encoding BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] R: Poll on ODUFlex-related encoding Lou Berger
- [CCAMP] R: R: Poll on ODUFlex-related encoding BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] R: R: Poll on ODUFlex-related encoding Lou Berger
- [CCAMP] R: R: R: Poll on ODUFlex-related encoding BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] Poll on ODUFlex-related encoding Zafar Ali (zali)
- Re: [CCAMP] Poll on ODUFlex-related encoding John E Drake
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Fred Gruman
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- [CCAMP] R: Poll on ODUFlex-related encoding BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] Poll on ODUFlex-related encoding Daniele Ceccarelli
- [CCAMP] R: Poll on ODUFlex-related encoding BELOTTI, SERGIO (SERGIO)
- Re: [CCAMP] R: Poll on ODUFlex-related encoding Lou Berger
- Re: [CCAMP] Poll on ODUFlex-related encoding Fatai Zhang
- Re: [CCAMP] Poll on ODUFlex-related encoding Gruman, Fred