Hi Gyan,
Thanks much for your questions.
Gyan> How does this draft compare to the WG LC draft for flood reduction.
Would they be two eventual standard options in the operators toolbox or
competing features for optimized flood reduction. Would having two flood
reduction features standardized versus one default IGP flood reduction feature
be confusing for operators. Just as it was confusing to me.
https://datatracker.ietf.org/doc/draft-ietf-lsr-dynamic-flooding/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf..org%2Fdoc%2Fdraft-ietf-lsr-dynamic-flooding%2F&data=02%7C01%7Chuaimo.chen%40futurewei.com%7C60df274544ba4b75447f08d7fd947201%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637256686327604003&sdata=TGrkecn6m9liviazX7qqPglGqYEWu5Ekg2FRIaDpBZ8%3D&reserved=0>
[HC]: This draft plus the draft for flooding reduction can provide two
modes of flooding reductions (i.e., centralized mode and distributed mode). The
latter describes the two modes, but does not include any flooding topology
computation algorithm for the distributed mode. The former proposes a flooding
topology computation algorithm to be used in the distributed mode.
Best Regards,
Huaimo
________________________________
From: Gyan Mishra <hayabusa...@gmail.com>
Sent: Thursday, May 21, 2020 10:36 AM
To: Huaimo Chen <huaimo.c...@futurewei.com>
Cc: Acee Lindem (acee) <acee=40cisco....@dmarc.ietf.org>; lsr@ietf.org
<lsr@ietf.org>
Subject: Re: [Lsr] Flooding Topology Computation Algorithm -
draft-cc-lsr-flooding-reduction-08 Working Group Adoption Call
On Wed, May 20, 2020 at 11:59 PM Huaimo Chen
<huaimo.c...@futurewei.com<mailto:huaimo.c...@futurewei.com>> wrote:
Hi Gyan,
Thanks much for your questions. My answers are inline below with [HC].
Best Regards,
Huaimo
________________________________
From: Gyan Mishra <hayabusa...@gmail.com<mailto:hayabusa...@gmail.com>>
Sent: Wednesday, May 20, 2020 11:14 AM
To: Huaimo Chen <huaimo.c...@futurewei.com<mailto:huaimo.c...@futurewei.com>>
Cc: Acee Lindem (acee)
<acee=40cisco....@dmarc.ietf.org<mailto:40cisco....@dmarc.ietf.org>>;
lsr@ietf.org<mailto:lsr@ietf.org> <lsr@ietf.org<mailto:lsr@ietf.org>>
Subject: Re: [Lsr] Flooding Topology Computation Algorithm -
draft-cc-lsr-flooding-reduction-08 Working Group Adoption Call
Huaimo
This is a much needed feature that operators have been needing for densely
meshed topologies that commonly exist in data centers to accommodate very high
bandwidth E-W traffic.
[HC]: Thank you very much.
Below is link from Cisco which has introduced feature for dynamic flooding in
clos high density ECMP data center topologies.
Please look at the feature description and it does seem to be exactly the same
as this draft. Please confirm.
[HC]: It seems different.
There maybe other vendors due to industry demand have to get the feature
deployed before it reaches standards vendor consensus with the IETF.
https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/white-paper-c11-743015.html<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fwww.cisco.com%2Fc%2Fen%2Fus%2Fproducts%2Fcollateral%2Fswitches%2Fnexus-9000-series-switches%2Fwhite-paper-c11-743015.html&data=02%7C01%7Chuaimo.chen%40futurewei.com%7C60df274544ba4b75447f08d7fd947201%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637256686327604003&sdata=CPEu2451qkfD9440Ihj1bKPWl%2BzH%2BiuYUwuWpfzR%2B0Q%3D&reserved=0>
We are testing this feature and planning to deploy but wanted to ensure that
this is the same as the draft on the standards track.
[HC]: The feature appears implemented draft "Dynamic Flooding on Dense Graphs",
which does not include any flooding topology computation algorithm.
Gyan> How does this draft compare to the WG LC draft for flood reduction.
Would they be two eventual standard options in the operators toolbox or
competing features for optimized flood reduction. Would having two flood
reduction features standardized versus one default IGP flood reduction feature
be confusing for operators. Just as it was confusing to me.
https://datatracker.ietf.org/doc/draft-ietf-lsr-dynamic-flooding/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf..org%2Fdoc%2Fdraft-ietf-lsr-dynamic-flooding%2F&data=02%7C01%7Chuaimo.chen%40futurewei.com%7C60df274544ba4b75447f08d7fd947201%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637256686327604003&sdata=TGrkecn6m9liviazX7qqPglGqYEWu5Ekg2FRIaDpBZ8%3D&reserved=0>
Kind regards
Gyan
On Tue, May 19, 2020 at 11:52 PM Huaimo Chen
<huaimo.c...@futurewei.com<mailto:huaimo.c...@futurewei.com>> wrote:
Hi Gyan,
Thank you very much for your questions and support.
This Flooding Topology Computation algorithm can be used in the Dynamic
Flooding on Dense Graphs to compute the flooding topologies for the data center
clos dense meshed topologies with many ECMP paths. It can be used by the area
leader in the centralized mode to compute the flooding topology.
Best Regards,
Huaimo
________________________________
From: Lsr <lsr-boun...@ietf.org<mailto:lsr-boun...@ietf.org>> on behalf of Gyan
Mishra <hayabusa...@gmail.com<mailto:hayabusa...@gmail.com>>
Sent: Tuesday, May 19, 2020 2:39 AM
To: Yanhe Fan <y...@casa-systems.com<mailto:y...@casa-systems.com>>
Cc: lsr@ietf.org<mailto:lsr@ietf.org> <lsr@ietf.org<mailto:lsr@ietf.org>>; Acee
Lindem (acee)
<acee=40cisco....@dmarc.ietf.org<mailto:40cisco....@dmarc.ietf.org>>
Subject: Re: [Lsr] Flooding Topology Computation Algorithm -
draft-cc-lsr-flooding-reduction-08 Working Group Adoption Call
I support WG adoption and have a few questions related to the draft.
Does this flooding algorithm use the dynamic flooding algorithm used in data
center clos dense meshed topologies with many ECMP paths where the flood is
decoupled from the physical topology. In the dynamic flooding algorithm
mentioned in centralized mode the flooding is computed by the area leader and
distributed to all nodes. In distributed mode each mode the area leader
determines the algorithm and then each node computes the flooding topology
based on the algorithm.
This dynamic algorithm for optimized flood reduction would reduce the amount of
redundant flooding in highly densely meshed ospf or Isis topologies. So this
optimization of flooding would improving overall link state routing protocol
convergence.
Gyan
On Mon, May 18, 2020 at 3:37 PM Yanhe Fan
<y...@casa-systems.com<mailto:y...@casa-systems.com>> wrote:
Support it as a co-author.
Thanks,
Yanhe
From: Lsr <lsr-boun...@ietf.org<mailto:lsr-boun...@ietf.org>> On Behalf Of Acee
Lindem (acee)
Sent: Friday, May 15, 2020 3:40 PM
To: lsr@ietf.org<mailto:lsr@ietf.org>
Subject: [Lsr] Flooding Topology Computation Algorithm -
draft-cc-lsr-flooding-reduction-08 Working Group Adoption Call
This begins a 3 week (due to holidays) WG adoption call for the “Flooding
Topology Computation Algorithm” draft. Please issue your support or objection
to this list by 11:59 PM, UTC on June 5th, 2020. Here is a URL for your
convenience.
https://datatracker.ietf.org/doc/draft-cc-lsr-flooding-reduction/<https://nam11.safelinks.protection.outlook.com/?url=https%3A%2F%2Fdatatracker.ietf..org%2Fdoc%2Fdraft-cc-lsr-flooding-reduction%2F&data=02%7C01%7Chuaimo.chen%40futurewei.com%7C60df274544ba4b75447f08d7fd947201%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637256686327614000&sdata=FkKUWXneiQIUtjkGB6RITfo0vAt2qhkwDWB%2BghP7%2FLg%3D&reserved=0>
Thanks,
Acee
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Mishra
Network Solutions Architect
M 301 502-1347
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Silver Spring,
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Gyan Mishra
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Network Solutions Architect
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Gyan Mishra
Network Solutions Architect
M 301 502-1347
13101 Columbia Pike
Silver Spring, MD
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