Re: [Idr] BGP-LS alternatives - problems and solutions

Dhruv Dhody <dhruv.ietf@gmail.com> Thu, 30 June 2022 06:22 UTC

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From: Dhruv Dhody <dhruv.ietf@gmail.com>
Date: Thu, 30 Jun 2022 11:52:02 +0530
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To: Muthu Arul Mozhi Perumal <muthu.arul@gmail.com>
Cc: Susan Hares <shares@ndzh.com>, "idr@ietf.org" <idr@ietf.org>
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Subject: Re: [Idr] BGP-LS alternatives - problems and solutions
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Thanks Muthu,

Let me add some introduction -  PCEP-LS [1] specify a new message, a new
object, and some container TLVs but reuses the BGP-LS sub-TLVs inside. It
is a particularly good alternative when PCECC [2][3] is in use and for
optical networks [4].

Thanks,
Dhruv

[1] https://datatracker.ietf.org/doc/draft-dhodylee-pce-pcep-ls/
[2] https://datatracker.ietf.org/doc/rfc8283/
[3] https://datatracker.ietf.org/doc/rfc9050/
[4] https://datatracker.ietf.org/doc/draft-lee-pce-pcep-ls-optical/

On Thu, Jun 30, 2022 at 11:30 AM Muthu Arul Mozhi Perumal <
muthu.arul@gmail.com> wrote:

> Hi,
>
> A comment inline..
>
> On Thu, Jun 30, 2022 at 3:18 AM Susan Hares <shares@ndzh.com> wrote:
>
>> IDR WG continues to strive to create BGP technology that
>>
>> a) enables the BGP protocols to solve customer problems,
>>
>> b) enables implementers to create efficient code, and
>>
>> c) helps to create a stable and manageable routing infrastructure.
>>
>>
>>
>> In our striving, it is sometimes useful to consider
>>
>> whether a technology can be improved.
>>
>> In our last WG adoption call for a BGP-LS feature,
>>
>> the question was raised whether there were better
>>
>> alternatives to BGP-LS.
>>
>>
>>
>> IDR focus is on specific BGP solutions for specific
>>
>> problems.  Below I’ve given you a sample format.
>>
>>
>>
>> If we have enough problem/solutions, we’ll hold an interim
>>
>> for further discussions.
>>
>>
>>
>> Cheers,  Sue
>>
>>
>>
>> ====================
>>
>>
>>
>> Problem:  BGP-LS original authors wanted to expose LSR (OSPF and ISIS)
>>
>> Information via BGP
>>
>>
>>
>> Use case:  Wide Area networks with multiple IGP domains
>>
>> connected by BGP
>>
>>
>>
>> Solution:  draft-li-lsr-droid-00.txt
>>
>> Benefits:  Allows clear delineation between information
>>
>> Distribution and routing.  Frees up routing protocols to
>>
>
> There is also an experimental PCEP-LS: draft-dhodylee-pce-pcep-ls
>
> Regards,
> Muthu
>
>> Just do routing.
>>
>>
>>
>> Deficit/Benefit:
>>
>> 1. New protocol must be deployed along with
>>
>> ISIS, OSPF and BGP.
>>
>> 2. Interactions between BGP-LS
>>
>>
>>
>> Open issues:  What are potential error conditions for
>>
>> Protocol interactions (ISIS/OSPF to DROID)?
>>
>>
>>
>>
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>>
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