Before you start the migration, meet the following prerequisites:
Configure IPv6 addresses on the host systems. The systems would be in dual mode; that is, they are using both IPv4 and IPv6 addresses.
Modify the /etc/resolv.conf
file so that it includes both IPv4 and IPv6 DNS servers and domain names.
If DNS servers are not available, then add the IPv6 entries in the /etc/hosts
file.
The hostnames of virtual IPs used for both IPv4 and IPv6 for VCS global clustering and RVG service groups should also be the same.