[c-nsp] Dual Planar Core Design

[Phil Bedard]

We have looked at a dual plane design for both reliability and scalability.  In some instances the design can result in less hardware than your typical ring design if traffic can be balanced well enough across multiples planes.  The other benefit is being able to extend a network beyond two planes in order to eliminate density issues and having to move to more complex proprietary multi-chassis setups or having to upgrade to larger routers.   Similar to the newer leaf/spine clos data center setups.  

The biggest hurdle is usually migrating an existing core network away from a traditional design. 

If you talk to your SE teams they can put you in touch with folks who can provide more details but it's true there isn't a lot of information out there.  

Phil.

On Sep 6, 2012, at 5:29 AM, Adam Vitkovsky <adam.vitkovsky at swan.sk> wrote:

> Oh yeah 3D network diagrams been here for quite some time now they look
> great on paper and have some mind blowing possibilities, however the cost of
> such a solution is mind blowing as well
> These are usually meant for core networks = most expensive boxes in the
> network - now try to convince the management that you actually need to build
> a second backbone to improve availability
> 
> I had the honor to study a state of the art multi-planar control-plane
> architecture which was actually used for scalability reasons rather than HA
> Back then I started to play with these concepts  in the virtual lab - as I
> mentioned already, these type of designs need plethora of hardware -so it
> was easier to simulate them
> 
> To your question
> I believe these designs are a well kept secrets of those who actually run
> them so you probably won't find presentations about real deployments.
> Though you can find several academic papers and studies
> These popped up when I searched for: ospf tetrahedron
> http://www.nyu.edu/its/pubs/connect/spring04/kyriannis_nyunet3.html
> http://newsroom.cisco.com/dlls/NYU_CP.pdf
> 
> 
> adam
> -----Original Message-----
> From: cisco-nsp-bounces at puck.nether.net
> [mailto:cisco-nsp-bounces at puck.nether.net] On Behalf Of Alexander Lim
> Sent: Thursday, September 06, 2012 2:40 AM
> To: cisco-nsp at puck.nether.net
> Subject: [c-nsp] Dual Planar Core Design
> 
> Guys,
> 
> Do you know if there is any reference for dual planar core network design
> out there?
> I came to know about this from cisco live session BRKRST-3365 "the evolution
> of the next generation network"
> 
> Thanks. 
> 
> Regards,
> Alexander Lim
> 
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