Hi all,
I am trying to understand the relationship between VXLAN subnets, clusters and distributed switches.
For example if we want to push Layer 3 down to the ToR switches and have a /24 subnet per rack and we have 20 racks in total, my understanding is that would mean 20 different VXLAN subnets.
In the NSX web GUI we set VXLAN subnets (or “Pools”) at the cluster level. So am I right in thinking 1 cluster = VXLAN 1 subnet?
I would also like to understand the relationship to VDS.
In the VMware hands on lab example they use a separate VDS per cluster. (http://docs.hol.vmware.com/HOL-2014/hol-sdc-1403_html_en/)
In other examples I see a single VDS is used across both compute and management clusters. (http://roie9876.wordpress.com/2014/04/15/nsx-home-lab-part-1/)
So to summarise, if I want to use a different VXLAN subnets per rack, do I need to create more clusters? And should I be using a single VDS for the whole DC or one per cluster? Does it matter?
Thanks
Bobby