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DHagar
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DHagar,
User Rank: Light Sabre
3/17/2015 | 1:37:59 PM
Re: Large data centers ditch overlays
Dredgie, makes sense.   It sounds as if this can be a missing link to putting an effective "system" together for the Telco Data Centers.  That's good news.
Dredgie
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Dredgie,
User Rank: Light Sabre
3/17/2015 | 1:12:09 PM
Re: Large data centers ditch overlays
> Absolutely - you can run hybrid. Naturally open source is the key, here. Call it defacto standardization, to be fair. If you get someone like redhat in the loop (as in Calico) and are in their (RHEL) distro's, then it becomes easier for the mid-size players to adopt. But L3 isn't for everyone. If I'm a small DC, then I could stick with L2 as I won't hit the scale where such solutions become overly complex. 
DHagar
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DHagar,
User Rank: Light Sabre
3/17/2015 | 12:57:15 PM
Re: Large data centers ditch overlays
Dredgie, sounds good.  This could then become a viable "utility" to provide the overlays needed?  Note:  As long as there are multiple major providers to fill this space, and/or it's enough of an industry standard that it drives the smaller providers as well?
Dredgie
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Dredgie,
User Rank: Light Sabre
3/17/2015 | 11:58:10 AM
Re: Large data centers ditch overlays
> Far better scalability. It's Internet scale (BGP routing). If you look at the big data centers today (think google, FB, Amazon, and the like), none are using L2 overlay techniques. They are all L3 of some kind – just not standardized. You don't have to be as big as those guys to look at layer 2, though. Not even close.

L3 is also easier than L2, once the right hooks are in place: rip/replace OVS with the Linux router. Add a BGP stack then some back-end ACL and cloud OS plug-ins. RR for scale and you have the basics in place. No overlays. Not encap overheads. 
DHagar
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DHagar,
User Rank: Light Sabre
3/16/2015 | 9:17:11 PM
Re: Large data centers ditch overlays
Dredgie, interesting option.  Does that provide the same level of scability?  If so, it could become a viable alternative, as you suggest.

I am in agreement with Roz, it appears that the overlays will provide the foundation to truly solve the growing complexity and serve the growing demands of data centers.
Dredgie
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Dredgie,
User Rank: Light Sabre
3/16/2015 | 7:41:20 PM
Large data centers ditch overlays
> There is an option to ditch the overlays partially or entirely and opt for all-IP with open source initiatives like Project Calico. (http://www.projectcalico.org) Even the OVS guys are getting into the game with OVN. I believe this is becoming the preferred deployment model for LXC abstractions like Docker in larger data centers and makes those MPLS interconnects easy.


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