Re: [Isis-wg] [Bier] WGLC : draft-ietf-bier-isis-extensions-07.txt

Jeff Tantsura <jefftant.ietf@gmail.com> Thu, 15 February 2018 06:24 UTC

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From: Jeff Tantsura <jefftant.ietf@gmail.com>
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Date: Wed, 14 Feb 2018 22:24:02 -0800
Cc: "Dolganow, Andrew (Nokia - SG/Singapore)" <andrew.dolganow@nokia.com>, Xiejingrong <xiejingrong@huawei.com>, "arkadiy.gulko@thomsonreuters.com" <arkadiy.gulko@thomsonreuters.com>, "bier@ietf.org" <bier@ietf.org>, "isis-wg@ietf.org" <isis-wg@ietf.org>
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To: "Acee Lindem (acee)" <acee@cisco.com>
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Subject: Re: [Isis-wg] [Bier] WGLC : draft-ietf-bier-isis-extensions-07.txt
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+1

I’d really like to see justification for anything larger than 8 bits.

Regards,
Jeff

> On Feb 14, 2018, at 18:30, Acee Lindem (acee) <acee@cisco.com> wrote:
> 
> I agree. As a point of reference, we've only have defined two IGP algorithms so far and the segment routing draft dates back about 4 years. 
> 
> https://www.iana.org/assignments/igp-parameters/igp-parameters.xhtml#igp-algorithm-types
> 
> Even with more artistic freedom afforded to multicast,  I still believe 256 standard algorithms are enough. 
> 
> Thanks,
> Acee 
> 
> On 2/14/18, 9:15 PM, "BIER on behalf of Dolganow, Andrew (Nokia - SG/Singapore)" <bier-bounces@ietf.org on behalf of andrew.dolganow@nokia.com> wrote:
> 
>    Guys,
> 
>    I would think 8 bits are sufficient. Others (like SegRtg mentioned below also use 8). 8 bits gives us tons of room to grow - especially since we have only a single value defined currently (SFP 0). If we have clear use cases that show us running out of 8 bits or getting close to that we can/should discuss and evaluate extensions in light of that but increasing the space "just in case" is not a prudent way to go.
> 
>    Andrew
> 
>    -----Original Message-----
>    From: BIER <bier-bounces@ietf.org> on behalf of Xiejingrong <xiejingrong@huawei.com>
>    Date: Wednesday, February 14, 2018 at 5:06 PM
>    To: Arkadiy Gulko <arkadiy.gulko@thomsonreuters.com>om>, "bier@ietf.org" <bier@ietf.org>rg>, "isis-wg@ietf.org" <isis-wg@ietf.org>
>    Subject: Re: [Bier] WGLC : draft-ietf-bier-isis-extensions-07.txt
> 
>        Hi Arkadiy,
> 
>        I checked the latest <draft-ietf-ospf-segment-routing-extensions-24> and <draft-ietf-isis-segment-routing-extensions-15> for reference and comparing, and they both use a 8 bits Algorithm.
>        One of the description: "Algorithm: Single octet identifying the algorithm."
> 
>        Interesting to use more than 8 bits for BIER's future flexibility :-)
> 
>        Regards,
>        XieJingrong
> 
> 
>        -----Original Message-----
>        From: BIER [mailto:bier-bounces@ietf.org] On Behalf Of arkadiy.gulko@thomsonreuters.com
>        Sent: Wednesday, February 14, 2018 8:42 AM
>        To: bier@ietf.org; isis-wg@ietf.org
>        Subject: [Bier] WGLC : draft-ietf-bier-isis-extensions-07.txt
> 
>        Hello Working Group,
>        After initial discussions between multiple participants of the working group, we consolidated that BIER's future flexibility would be well served if we extend the IGP signaling BAR field to 16 bits. We are currently reviewing various use-cases that can greatly benefit from this enhancement.
>        I would appreciate if the proposed change could be considered as part of IETF Last Call review.
>        Thanks,
>        Arkadiy
> 
> 
>        -----Original Message-----
>        From: BIER [mailto:bier-bounces@ietf.org] On Behalf Of internet-drafts@ietf.org
>        Sent: Friday, February 09, 2018 5:11 PM
>        To: i-d-announce@ietf.org
>        Cc: bier@ietf.org
>        Subject: [Bier] I-D Action: draft-ietf-bier-isis-extensions-07.txt
> 
> 
>        A New Internet-Draft is available from the on-line Internet-Drafts directories.
>        This draft is a work item of the Bit Indexed Explicit Replication WG of the IETF.
> 
>                Title           : BIER support via ISIS
>                Authors         : Les Ginsberg
>                                  Tony Przygienda
>                                  Sam Aldrin
>                                  Jeffrey (Zhaohui) Zhang
>            Filename        : draft-ietf-bier-isis-extensions-07.txt
>            Pages           : 10
>            Date            : 2018-02-09
> 
>        Abstract:
>           Specification of an ISIS extension to support BIER domains and sub-
>           domains.
> 
> 
> 
>        The IETF datatracker status page for this draft is:
>        https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_draft-2Dietf-2Dbier-2Disis-2Dextensions_&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=JA6g2ZDvIPLQHZqHQByKQq-jvOcxu4cQskARppQFqZc&m=TOz3rr3No8ReKzE_27M4FMDvmv6fa9xveuyL5HyTvYs&s=3qPmQav_QUBjHi7KygPVk9bIhVZ7TL2Z3xfHOo_Cjwc&e= 
> 
>        There are also htmlized versions available at:
>        https://urldefense.proofpoint.com/v2/url?u=https-3A__tools.ietf.org_html_draft-2Dietf-2Dbier-2Disis-2Dextensions-2D07&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=JA6g2ZDvIPLQHZqHQByKQq-jvOcxu4cQskARppQFqZc&m=TOz3rr3No8ReKzE_27M4FMDvmv6fa9xveuyL5HyTvYs&s=_nTFvlAW24snrkMm3aQ2uWLFsLCajYeW4HO3DdEiwvs&e=
>        https://urldefense.proofpoint.com/v2/url?u=https-3A__datatracker.ietf.org_doc_html_draft-2Dietf-2Dbier-2Disis-2Dextensions-2D07&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=JA6g2ZDvIPLQHZqHQByKQq-jvOcxu4cQskARppQFqZc&m=TOz3rr3No8ReKzE_27M4FMDvmv6fa9xveuyL5HyTvYs&s=zHWCGuyM-GSX-slbFtCv4fs9ml5gPQBeXohosuyhpx4&e= 
> 
>        A diff from the previous version is available at:
>        https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_rfcdiff-3Furl2-3Ddraft-2Dietf-2Dbier-2Disis-2Dextensions-2D07&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=JA6g2ZDvIPLQHZqHQByKQq-jvOcxu4cQskARppQFqZc&m=TOz3rr3No8ReKzE_27M4FMDvmv6fa9xveuyL5HyTvYs&s=pDVWzZrYzGia4WKiA_cSF0P5isUmMeojSvHJIGgdOTk&e= 
> 
> 
>        Please note that it may take a couple of minutes from the time of submission until the htmlized version and diff are available at tools.ietf.org.
> 
>        Internet-Drafts are also available by anonymous FTP at:
>        https://urldefense.proofpoint.com/v2/url?u=ftp-3A__ftp.ietf.org_internet-2Ddrafts_&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=JA6g2ZDvIPLQHZqHQByKQq-jvOcxu4cQskARppQFqZc&m=TOz3rr3No8ReKzE_27M4FMDvmv6fa9xveuyL5HyTvYs&s=wqMqmybm38ZiX4CuzJaNJPMea1Mf-pSgD-vdgAHk850&e= 
> 
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