Re: [mpls] Fast Reroute for Node Protection in LDP-based LSPs

Santosh Esale <sesale@juniper.net> Fri, 09 December 2016 19:15 UTC

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From: Santosh Esale <sesale@juniper.net>
To: "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
Thread-Topic: Fast Reroute for Node Protection in LDP-based LSPs
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Date: Fri, 9 Dec 2016 19:15:45 +0000
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Cc: Hannes Gredler <hannes@gredler.at>, "mpls@ietf.org" <mpls@ietf.org>, "rtgwg@ietf.org" <rtgwg@ietf.org>
Subject: Re: [mpls] Fast Reroute for Node Protection in LDP-based LSPs
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Hi Stefano,
           The main purpose of the solution is to provide
topology independent local protection using RSVP-TE in widely
deployed LDP based MPLS networks. Link protection is already
deployed using manually configured RSVP-TE one-hop LSPs. This
draft addresses node protection.

 
Now, the solution can also be used to protect segment routing
hop-by-hop node segments and we would add a note about it.
Of course, the other solution that you mentioned may fit
segment-routing too.

Thanks,
Santosh
On 12/7/16, 1:30 AM, "Stefano Previdi (sprevidi)" <sprevidi@cisco.com>
wrote:

>
>> On Dec 6, 2016, at 11:55 PM, Santosh Esale <sesale@juniper.net> wrote:
>> 
>> Hi Hannes,
>>          Good point! We will generalize the solution to cover
>> segment-routing (SR) too in the next - 05 revision.
>
>
>I don’t think your solution brings anything better than what already
>covered in ti-lfa draft for segment-routing. See
>draft-francois-rtgwg-segment-routing-ti-lfa-02.
>
>s.
>
>
>> 
>> Thanks,
>> Santosh
>> 
>> On 12/6/16, 3:17 AM, "Hannes Gredler" <hannes@gredler.at> wrote:
>> 
>>> hi santosh,
>>> 
>>> just curious why the proposed solution is constrained to only use LDP ?
>>> 
>>> IMO what you have suggested here would just fit nicely for protecting
>>> segment-routing node labels as well. segment routing node-labels are
>>> "calculated" in a similar fashion than LDP labels as such my guess
>>>would
>>> be that this solution applies to SR node labels as well.
>>> 
>>> suggest to generalize it to:
>>> "Fast Reroute for Node Protection in hop-by-hop based LSPs"
>>> 
>>> thanks,
>>> 
>>> /hannes
>>> 
>>> 
>>> On 12/5/16 20:59, Santosh Esale wrote:
>>>> Hello Everyone,
>>>>                           We have presented the draft
>>>> - draft-esale-mpls-ldp-node-frr – in
>>>> MPLS working group in three IETF meetings including the latest one at
>>>> Seul. 
>>>> However, as the draft is of interest to routing working too, we are
>>>> initiating this
>>>> thread to solicit feedbacks from the routing working group. Please let
>>>> us know
>>>> your comments.
>>>> 
>>>> Presentations -
>>>> https://www.ietf.org/proceedings/93/slides/slides-93-mpls-3.pdf
>>>> https://www.ietf.org/proceedings/94/slides/slides-94-mpls-3.pptx
>>>> 
>>>> 
>>>>https://www.ietf.org/proceedings/97/slides/slides-97-mpls-08-ti-frr-iet
>>>>f-
>>>> 97-00.pptx
>>>> 
>>>> Thanks,
>>>> Santosh (on behalf of authors)
>>>> 
>>>> 
>>>> _______________________________________________
>>>> rtgwg mailing list
>>>> rtgwg@ietf.org
>>>> https://www.ietf.org/mailman/listinfo/rtgwg
>>>> 
>> 
>> _______________________________________________
>> rtgwg mailing list
>> rtgwg@ietf.org
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>