Re: [Idr] FW: New Version Notification for draft-wu-idr-flowspec-dip-community-filter-00.txt

Hi,

I am not sure if this is targeting FlowSpec v2 ... but I would like to
observe that component types as defined in RFC8955 are about data plane.

You are proposing an addition of a control plane entity - namely BGP
Community Attribute.

I understand that you want to recursively result local installation into
the data plane all destinations which are advertised in BGP with such
community, but this is a significant departure from the definition of
FlowSpec v1.

It is about signalling dynamically a BGP policy which FlowSpec v1 is not
doing.  With that being said I recommend that if authors of FlowSpec v2 are
still working on it allowing it to carry BGP policy - then this would be
the right place to add the proposed encoding into.

As currently defined - stand alone extension - it does not seems to even
fit https://www.iana.org/assignments/flow-spec/flow-spec.xhtml.

Kind regards,
Robert

On Mon, Mar 4, 2024 at 11:55 AM wutianhao <wutianhao10=
40huawei.com@dmarc.ietf.org> wrote:

> Dear all,
>
> We've submitted a new draft: draft-wu-idr-flowspec-dip-community-filter.
>
> This draft specifies a new BGP Flowspec component type to support
> community-level filtering. Flowspec rules can be reduced by using the
> method defining in this draft. It saves a lot of entry spaces on the
> control plane and forwarding plane, and it would greatly simplify the
> operation of the control plane, and the more destination prefixes with the
> same community has, the more obvious the benefit.
>
> Review and comments are welcome.
>
> Best regards,
> Tianhao
>
> -----Original Message-----
> From: internet-drafts@ietf.org <internet-drafts@ietf.org>
> Sent: 2024年2月29日 17:26
> To: Wanghaibo (Rainsword) <rainsword.wang@huawei.com>; Gejun (Jack, BGP) <
> jack.gejun@huawei.com>; wutianhao <wutianhao10@huawei.com>; Dingxiangfeng
> <dingxiangfeng@huawei.com>
> Subject: New Version Notification for
> draft-wu-idr-flowspec-dip-community-filter-00.txt
>
> A new version of Internet-Draft
> draft-wu-idr-flowspec-dip-community-filter-00.txt has been successfully
> submitted by Tianhao Wu and posted to the IETF repository.
>
> Name:     draft-wu-idr-flowspec-dip-community-filter
> Revision: 00
> Title:    Destination-IP-Community Filter for BGP Flow Specification
> Date:     2024-02-28
> Group:    Individual Submission
> Pages:    7
> URL:
> https://www.ietf.org/archive/id/draft-wu-idr-flowspec-dip-community-filter-00.txt
> Status:
> https://datatracker.ietf.org/doc/draft-wu-idr-flowspec-dip-community-filter/
> HTMLized:
> https://datatracker.ietf.org/doc/html/draft-wu-idr-flowspec-dip-community-filter
>
>
> Abstract:
>
>    BGP Flowspec mechanism (BGP-FS) propagates both traffic Flow
>    Specifications and Traffic Filtering Actions by making use of the BGP
>    NLRI and the BGP Extended Community encoding formats.  This document
>    specifies a new BGP-FS component type to support community-level
>    filtering.  The match field is the community of the destination IP
>    address that is encoded in the Flowspec NLRI.  This function is
>    applied in a single administrative domain.
>
>
>
> The IETF Secretariat
>
>
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