1) Nexus 9000 switches support Static vxlan tunnels by a configuration called Static Ingress replication. Under the NVE interface, for the respective VNIs, you will need to mention the mode of replication(which is "ingress-replication protocol static...
if the sites are layer 3 reachable, you can use the multisite feature. you will need to configure border gateways in a multisite deployment;note the licensing requirements detailed here-> https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexu...
Could you reply on below queries;
- what is the NXOS version on n9ks
- what exact model are those n9ks
btw, i tested on 92160 running 9.2(3) and it worked perfectly fine.
coming in late; I do see that the vxlan support is listed here -> https://www.cisco.com/c/en/us/products/collateral/switches/nexus-9000-series-switches/datasheet-c78-742284.htmland am unable to see the "NA" against vxlan in the link which you mention...