SAN Volume Controller supports either a single IPv4 or a single IPv6 connection (but not both) between a SAN Volume Controller target and a host initiator. Each SAN Volume Controller node port is a target.
If you have both IPv4 and IPv6 addresses that are configured at the target IP port of the SAN Volume Controller nodes and your host is running an IPv4 and IPv6 stack, follow these guidelines:
If, for example, you have a two-node cluster with nodes A and B:
Run a discovery command only on your host that discovers target devices at node A port 1 IPv4 or node A port 1 IPv6, but not both. You can choose to mix IPv4 and IPv6 discovery on different node ports. To ensure that this occurs, use the node IP address in the host discovery command because this means you can explictly indicate a single IP address in the discovery command. If you use the IQN for the SAN Volume Controller node port in the discovery command, you are implicitly saying that you want to discover at IPv4 and IPv6 on the node port, if such addresses exist.
If you just have a single IPv4 or IPv6 address configured at each node port, you can use the normal IQN in the host discovery methods.