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

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>, "bier@ietf.org" <bier@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-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= 

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        A diff from the previous version is available at:
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