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Tuesday
Feb102009

Hoff to Cohen to ... Watching a Meme and its Wake

Reuven Cohen of Enomaly fame took a nugget from Christofer Hoff and really worked it well.  What I like as much (if not more) than the notion of an IPv6 VLAN overlay on IPv4, is this statement: 

"The cloud is a kind of "multiverse" where the rules of nature can continually be rewritten using quarantined virtual worlds within other virtual worlds (aka virtualization)."
This is precisely the recognition the founders of Replicate, Rich Pelavin and Ken Novak, had several years ago and was the basis of the company's first offering... a networking "lab" offered as a service for developers who needed to test out their multi-tiered applications when distributed within various and assorted network configurations.  They just provisioned a virtual network appliance -- router, switch, load balancer, firewall -- virtually reconfigured the "cabling" and ... voila. 

It's wonderful to see lightbulbs going on, triggered by other lightbulbs.

ElasticVapor :: Life in the Cloud: The Hybrid Cloud Multiverse (IPv6 VLANS)

  ...one of the great things about cloud computing is in its ability to virtualize everything. The cloud is a kind of "multiverse"
where the rules of nature can continually be rewritten using
quarantined virtual worlds within other virtual worlds (aka
virtualization). The need for a traditional physical piece of hardware
is no longer a requirement or necessary.

For example VLANs don't need to differentiate between IPv4 and IPv6; the deployment is just dual-stack, as Ethernet is without VLANs. So why not just use modern VLAN technology to "overlay" IPv6 links onto existing IPv4 links? This can be achieved without needing any changes to the IPv4 configuration and allows for seamless and secure cloud networking while also allowing for all the wonders that IPv6 brings. It's in a sense the best of both worlds, the old with the new.

A VLAN based IPv6 overlay offers several interesting aspects such network security that is directly integrated into the design of the IPv6 architecture. (Security being one of the biggest limitations to broader cloud adoption) IPv6 also implements a feature that simplifies aspects of address assignment (stateless address autoconfiguration) and network renumbering (prefix and router announcements) when changing Internet connectivity providers. It's almost like the designers of IPv6 envisioned the hybrid cloud model.

Thanks for the inspiration Hoff, looking forward to trying this out.

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