Re: [bess] New Version Notification for draft-dawra-bess-srv6-services-01.txt

Gaurav Dawra <gdawra.ietf@gmail.com> Mon, 08 July 2019 05:35 UTC

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From: Gaurav Dawra <gdawra.ietf@gmail.com>
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Date: Sun, 7 Jul 2019 22:35:22 -0700
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Subject: Re: [bess] New Version Notification for draft-dawra-bess-srv6-services-01.txt
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Hi Bess WG,

To facilitate the review of latest update - here is some more context.

The new revision addresses all comments received from the WG, including the following.
When Function part of SRv6 SID is unique per NLRI(example EVPN VPWS service), encoding it in SID attribute may introduce some degradation in BGP packing assuming other BGP attributes are shared for set of NLRI’s.

Specifically, in order to address the BGP packing issue, we are proposing the following in the new version:
 
Flexibility of advertising Function and Arguments of SRv6 SID in label field of route NLRI. This addresses BGP packing concern when SID is unique per NLRI(example EVPN VPWS service), assuming other BGP attributes are shared for set of NLRI’s.
Advertisement of SRv6 SID structure sub-sub tlv in SID attribute. It also provides ability to create SRv6 SID when individual fields are available separately.
These updates are completely backward compatible with previous version.

Gaurav

Sent from my iPhone

> On Jul 5, 2019, at 12:55 PM, Gaurav Dawra <gdawra.ietf@gmail.com> wrote:
> 
> Hi Bess WG,
> 
> We have posted a new version of SRv6 Services document. 
> 
> Cheers,
> 
> Gaurav 
> 
> ---------- Forwarded message ---------
> From: <internet-drafts@ietf.org>
> Date: Fri, Jul 5, 2019 at 12:55 PM
> Subject: New Version Notification for draft-dawra-bess-srv6-services-01.txt
> To: Jonn Leddy <john_leddy@cable.comcast.com>, Swadesh Agrawal <swaagraw@cisco.com>, Robert Raszuk <robert@raszuk.net>, Dirk Steinberg <dws@steinberg.net>, daniel.voyer@bell.ca <daniel.voyer@bell.ca>, Bruno Decraene <bruno.decraene@orange.com>, Jorge Rabadan <jorge.rabadan@nokia.com>, Gaurav Dawra <gdawra.ietf@gmail.com>, Shunwan Zhuang <zhuangshunwan@huawei.com>, daniel.bernier@bell.ca <daniel.bernier@bell.ca>, Clarence Filsfils <cfilsfil@cisco.com>, Patrice Brissette <pbrisset@cisco.com>, Satoru Matsushima <satoru.matsushima@g.softbank.co.jp>
> 
> 
> 
> A new version of I-D, draft-dawra-bess-srv6-services-01.txt
> has been successfully submitted by Gaurav Dawra and posted to the
> IETF repository.
> 
> Name:           draft-dawra-bess-srv6-services
> Revision:       01
> Title:          SRv6 BGP based Overlay services
> Document date:  2019-07-03
> Group:          Individual Submission
> Pages:          28
> URL:            https://www.ietf.org/internet-drafts/draft-dawra-bess-srv6-services-01.txt
> Status:         https://datatracker.ietf.org/doc/draft-dawra-bess-srv6-services/
> Htmlized:       https://tools.ietf.org/html/draft-dawra-bess-srv6-services-01
> Htmlized:       https://datatracker.ietf.org/doc/html/draft-dawra-bess-srv6-services
> Diff:           https://www.ietf.org/rfcdiff?url2=draft-dawra-bess-srv6-services-01
> 
> Abstract:
>    This draft defines procedures and messages for SRv6-based BGP
>    services including L3VPN, EVPN and Internet services.  It builds on
>    RFC4364 "BGP/MPLS IP Virtual Private Networks (VPNs)" and RFC7432
>    "BGP MPLS-Based Ethernet VPN".
> 
> 
> 
> 
> 
> 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.
> 
> The IETF Secretariat
>