+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) <a...@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-boun...@ietf.org on behalf of andrew.dolga...@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-boun...@ietf.org> on behalf of Xiejingrong 
> <xiejingr...@huawei.com>
>    Date: Wednesday, February 14, 2018 at 5:06 PM
>    To: Arkadiy Gulko <arkadiy.gu...@thomsonreuters.com>, "b...@ietf.org" 
> <b...@ietf.org>, "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-boun...@ietf.org] On Behalf Of 
> arkadiy.gu...@thomsonreuters.com
>        Sent: Wednesday, February 14, 2018 8:42 AM
>        To: b...@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-boun...@ietf.org] On Behalf Of 
> internet-dra...@ietf.org
>        Sent: Friday, February 09, 2018 5:11 PM
>        To: i-d-annou...@ietf.org
>        Cc: b...@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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> https://urldefense.proofpoint.com/v2/url?u=https-3A__www.ietf.org_mailman_listinfo_bier&d=DwICAg&c=4ZIZThykDLcoWk-GVjSLmy8-1Cr1I4FWIvbLFebwKgY&r=JA6g2ZDvIPLQHZqHQByKQq-jvOcxu4cQskARppQFqZc&m=TOz3rr3No8ReKzE_27M4FMDvmv6fa9xveuyL5HyTvYs&s=kxUz28mTxGjbNsEQMGi8SMZ93LSiMt_bMFzqkWJJZnU&e=
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> 
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> 
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> 
> 
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