Hello DavidQY,

You want to have iSCSI connections on a different network than regular network traffic.  If you are going to be doing any replication then you will need to have a minimum of 2 iSCSI connections per controller.

Please let us know if you have any other questions.

Hello DavidQY,

It is best to have two iSCSI subnets.  You can use just a single iSCSI subnet for all iSCSI traffic, however if you are doing replication then you will want 2 subnets so replication can be on it’s own subnet.

Please let us know if you have any other questions.

Hello DavidQY,

You will still get load balancing.  I would suggest that you alter your ports like the follow:

NIC1 (for example, 10.168.10.180) - SP A-0 and SP B-1 iSCSI connections

NIC2 (for example, 10.168.10.181) - SP A-1 and SP B-0 iSCSI connections

Please let us know if you have any other questions.

Hello DavidQY,

You can set it either way.  I have found that when customers setup using the way I suggested that they don’t have any issues.

Please let us know if you have any other questions.

Thanks a lot. so if we have a dedicated subnet for iscsi, does that allow the host to leverage 2 iSCSi initiator to access Unity? Or in that case, we need two iSCSI subnets? Thanks again.

Thanks Sam.
No we don't have replication. iSCSI only.

I understand ideally we want to configure a host with two NICs as below, for load balancing and failover:
NIC1 (for example, 10.168.10.180) - SP A-0 and SP B-0 iSCSI connections VLAN 200
NIC2 (for example, 10.168.11.180) - SP A-1 and SP B-1 iSCSI connections VLAN 201

However in this case, we only have one dedicated iSCSI subnet. So if we configure as below, do we still get load balancing and failover on the the HBA and SP ports? I understand we don't have redundancy on the switch or subnet.
NIC1 (for example, 10.168.10.180) - SP A-0 and SP B-0 iSCSI connections
NIC2 (for example, 10.168.10.181) - SP A-1 and SP B-1 iSCSI connections

Thanks again!

Thank you Sam.

Can you elaborate a bit more why we want to use different SP port for the same initiator? I thought we wanted to use the same SP ports for better failover? Thanks.