Please find the answers to your queries below
Also be automatically generated for the cluster private IP?
Is this so?
Answer: No, Private IP's are fixed IP's and they need to be explicitly configured
What requirements must have servers to work properly the allocation of IP interconnect?
Answer: Could you elaborate a little with regards to the above query?
Does it supports using the new GNS HAIP capacity?
Answer: There is no concept if GNS for HAIP
Ref: Grid Infrastructure Redundant Interconnect and ora.cluster_interconnect.haip (Doc ID 1210883.1)
Ref: DNS and DHCP Setup Example for Grid Infrastructure GNS (Doc ID 946452.1)
Vandana - Oracle