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  1. Using VxLan/GRE you can have more than 4094 networks, but still limited by 4094 per node. This is because VNI or GRE Tunnel ID is internally converted to a local scope VLAN ID.
  2. This limit means on one compute node you cannot have more than 4094 unique networks.
  3. This also means you can't have more than 4094 unique networks on single Network Node [I believe this is what you call Neutron Node in question]
  4. But you CAN have multiple Compute and Network nodes.

Also, I am assuming Neutron Node you mean node running L3 Agent. Let me know if am wrong in that. Hope this answers your question.