I don’t really understand the purpose of GNS and how to configure it. If I understand this article good I need to have let’s say 3 PCs.
dns.example.com eth0 192.168.10.250/24 rac1.example.com eth0 192.168.10.1/24 eth1 192.168.192.1/24 rac2.example.com eth0 192.168.10.2/24 eth1 192.168.192.2/24
On the dns.example.com I create my DNS configuration as for a standard cluster.
rac1 192.168.10.1 rac1-priv 192.168.192.1 rac2 192.168.10.2 rac2-priv 192.168.192.2
and
gns.example.com 192.168.10.100
in the resolv.conf
options attempts: 2 options timeout: 1 search example.com nameserver 192.168.10.250 nameserver 192.168.10.100
and after I have setup this it should be possible to create a Grid installation with GNS?
if the answer is no, why do I need a subdomain?
Edit:
https://gjilevski.com/2010/09/05/gns-configuration-for-oracle-11gr2-in-dns-using-dhcp/