Looking for audiovisual resources on Clos topologies

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1

Hi all,

I recently read a APNIC blog post about LINE's network redesign [0] into a Clos topology. That lead to me RFC7938 [1] which has a fairly minimal explanation of the topology design itself.

I was wondering if there are any NANOG or other *NOG talks explaining the Clos topology in a more audiovisual format. I figured I ask here before I go looking on a search engine.

Thanks in advance.

[0] - https://blog.apnic.net/2019/05/03/simplicity-is-key-to-network-redesign-for-line/

[1] - https://tools.ietf.org/html/rfc7938

2

I recently read a APNIC blog post about LINE's network redesign [0] into
a Clos topology. That lead to me RFC7938 [1] which has a fairly minimal
explanation of the topology design itself.

From the APNIC blog:

"In the case of LINE's network, where all servers in the data centre are
identified by eBGP, more than 10,000 ASNs are required."

They've traded L2 VLAN complexity for L3 ASN complexity. What's the old
saying in computer science? "All problems can be solved by adding a level
of redirection"?

https://blog.apnic.net/2019/05/03/simplicity-is-key-to-network-redesign-for-line/

Apparently, "simplicity" is the new euphemism for "let's push all the surprising
emergent effects of our design to someplace new..."

3

Hi all,

I recently read a APNIC blog post about LINE's network redesign [0] into a Clos topology. That lead to me RFC7938 [1] which has a fairly minimal explanation of the topology design itself.

I was wondering if there are any NANOG or other *NOG talks explaining the Clos topology in a more audiovisual format. I figured I ask here before I go looking on a search engine.

Thanks in advance.

Some notes from Facebook and Google network architecture evolution/designs Google: http://conferences.sigcomm.org/sigcomm/2015/pdf/papers/p183.pdf
Facebook: Introducing data center fabric, the next-generation Facebook data center network - Engineering at Meta

Some other related presentations:

Doug Hanks on multi-stage Clos architectures:

TeamNANOG: Building Scalable Data Centers: BGP is the Better IGP https://www.youtube.com/watch?v=yJbqnOdD3cg

TeamNANOG: Building a smallish DC...for the rest of us https://www.youtube.com/watch?v=4yL6_tKfIfk

UKNOFconf: UKNOF32 - Google datacentre networking https://www.youtube.com/watch?v=Thc7Muu9SHc

4

Thank you very much Hugo, I'll give these a look.