Hi Gyan,
Thanks much for your questions. My answers are inline below with [HC].
Best Regards,
Huaimo
________________________________
From: Gyan Mishra <[email protected]>
Sent: Wednesday, May 20, 2020 11:14 AM
To: Huaimo Chen <[email protected]>
Cc: Acee Lindem (acee) <[email protected]>; [email protected]
<[email protected]>
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%7Caf6069f07e9c4b9b881508d7fcd08b26%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637255844949669307&sdata=9nLFlmBSFxBQayL0fCiq864Ylvzyksk3U0GmZPbhPts%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.
Kind regards
Gyan
On Tue, May 19, 2020 at 11:52 PM Huaimo Chen
<[email protected]<mailto:[email protected]>> 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 <[email protected]<mailto:[email protected]>> on behalf of Gyan
Mishra <[email protected]<mailto:[email protected]>>
Sent: Tuesday, May 19, 2020 2:39 AM
To: Yanhe Fan <[email protected]<mailto:[email protected]>>
Cc: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>>; Acee
Lindem (acee)
<[email protected]<mailto:[email protected]>>
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
<[email protected]<mailto:[email protected]>> wrote:
Support it as a co-author.
Thanks,
Yanhe
From: Lsr <[email protected]<mailto:[email protected]>> On Behalf Of Acee
Lindem (acee)
Sent: Friday, May 15, 2020 3:40 PM
To: [email protected]<mailto:[email protected]>
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%7Caf6069f07e9c4b9b881508d7fcd08b26%7C0fee8ff2a3b240189c753a1d5591fedc%7C1%7C0%7C637255844949679298&sdata=08cwC5X8u06cotUPxaWyOq3euYKGK9Pfh0pieb7Tqf0%3D&reserved=0>
Thanks,
Acee
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Gyan Mishra
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M 301 502-1347
13101 Columbia
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Gyan Mishra
Network Solutions Architect
M 301 502-1347
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Silver Spring, MD
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