Re: [Isis-wg] FW: I-D Action: draft-white-openfabric-00.txt

Hannes Gredler <hannes@gredler.at> Tue, 07 March 2017 05:13 UTC

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To: Russ White <7riw77@gmail.com>, rtgwg@ietf.org, isis-wg@ietf.org
References: <148856628065.15830.3525312125332246258.idtracker@ietfa.amsl.com> <02ee01d296e9$ec570d00$c5052700$@gmail.com>
From: Hannes Gredler <hannes@gredler.at>
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Date: Tue, 7 Mar 2017 06:13:47 +0100
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Subject: Re: [Isis-wg] FW: I-D Action: draft-white-openfabric-00.txt
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hi russ,

couple of comments / questions.

1)
---
   OpenFabric implementations MUST NOT be mixed with standard IS-IS
   implementations in operational deployments.  OpenFabric and standard
   IS-IS implementations SHOULD be treated as two separate protocols.
---

any hard feelings about using MI as a way of guaranteeing that the two
protocols are shielded from each other ?

2) Modified Adjacency Formation

rather than doing the "only one adjacency is up" (which we did prior to
the graceful-restart SA bit) - suggest to use the graceful-restart 'SA'
bit, such that a node can bring up the adjacency without generating a
new LSP. The LSP can then be generated if the initial-sync is done
(and the new LSP arrival rate indicates that the dust is settling)
such that the LSP may get released.

3) Flooding Optimization
it looks to me you have re-invented the OLSR MPR set.
https://tools.ietf.org/html/rfc3626#section-8.2
perhaps you may want to add a reference.

/hannes

On 3/7/17 3:24, Russ White wrote:
> 
> FYI.
> 
> :-)
> 
> Russ
> 
>> -----Original Message-----
>> From: I-D-Announce [mailto:i-d-announce-bounces@ietf.org] On Behalf Of
>> internet-drafts@ietf.org
>> Sent: Friday, March 3, 2017 1:38 PM
>> To: i-d-announce@ietf.org
>> Subject: I-D Action: draft-white-openfabric-00.txt
>>
>>
>> A New Internet-Draft is available from the on-line Internet-Drafts
> directories.
>>
>>
>>         Title           : OpenFabric
>>         Authors         : Russ White
>>                           Shawn Zandi
>> 	Filename        : draft-white-openfabric-00.txt
>> 	Pages           : 13
>> 	Date            : 2017-03-03
>>
>> Abstract:
>>    Spine and leaf topologies are widely used in hyperscale and cloud
>>    scale networks.  In most of these networks, configuration is
>>    automated, but difficult, and topology information is extracted
>>    through broad based connections.  Policy is often integrated into the
>>    control plane, as well, making configuration, management, and
>>    troubleshooting difficult.  OpenFabric is an adaptation of an
>>    existing, widely deployed link state protocol, Intermediate Sytem to
>>    Intermediate System (IS-IS) that is designed to:
>>
>>    o  Provide a full view of the topology from a single point in the
>>       network to simplify operations
>>
>>    o  Minimize configuration of each router (or switch) in the network
>>
>>    o  Optimize the operation of IS-IS within a spine and leaf fabric to
>>       enable scaling
>>
>>    This document begins with an overview of OpenFabric, including a
>>    description of what may be removed from IS-IS to enable scaling.  The
>>    document then describes an optimized adjacency formation process; an
>>    optimized flooding scheme; some thoughts on the operation of
>>    OpenFabric, metrics, and aggregation; and finally a description of
>>    the changes to the IS-IS protocol required for OpenFabric.
>>
>>
>> The IETF datatracker status page for this draft is:
>> https://datatracker.ietf.org/doc/draft-white-openfabric/
>>
>> There's also a htmlized version available at:
>> https://tools.ietf.org/html/draft-white-openfabric-00
>>
>>
>> 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.
>>
>> Internet-Drafts are also available by anonymous FTP at:
>> ftp://ftp.ietf.org/internet-drafts/
>>
>> _______________________________________________
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>> Internet-Draft directories: http://www.ietf.org/shadow.html or
>> ftp://ftp.ietf.org/ietf/1shadow-sites.txt
> 
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