I am looking for some guidance as well as real life experience, gotchas, etc (if someone has done something similar it will be great to hear some thoughts). I am working on a design of 50+ DCs, meaning I’ll have 50+ fabrics across the globe. The requirement is to support multi-tenancy across all the sites and the only “relief” here is I only need to support layer3! That being said, I am considering multi-site, multi-pod architecture running route-servers within and between all sites.
My current idea is to have three major sites (regions) – US, EMEA & APAC. In each region I am planning running a pair of route-servers, used to distribute control plane within the “site” (or region). Each site (region) will be running as multi-pod fabric, sharing the same control plane. I think that should be okay from scaling POV, having in mind no support for Type-2’s is needed, meaning the underlay can be fairly simple . Day 1 I am expecting no more than 20,000 hosts within the entire network and maybe not more than 5,000 IP prefixes (Type-5s).
The answers I am looking for is:
I hope the above makes sense and thanks in advance for your time.
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