I have hosts with Dell QLogic FastLinQ QL41xxx Series 10/25 GbE Controller (iSCSI) CNA's in them which are connected to two separate Juniper EX4600 switches. That then connects into some Netapp storage array's.
I have a vswitch setup with 2 separate port groups attached to the vswitch and the physical adapters
I have both adapters tied to the port groups with 1 active and 1 standby. Each active is not the same in the two port groups.
In the storage adapters I just have 1 vmk attached to 1 vmhba. This is the only part of the configuration that differs from the guide but I have 2 actually vmhba's which the guide does not cover it only covers using the software adapter. Is this where my configuration is wrong and causing all traffic to go over 1 NIC at a time? If this is would adding the other vmk to both vmhba's cause any issues if done in production? Would this causing any issues since I have separate SAN's ie SAN A and SAN B? If there are any guides on this kind of setup ie 2 SANs I would appreciate links to those. All I can find are old single SAN setup documents.
Read this best practice document: Best Practices For Running VMware vSphere On iSCSI | VMware
You need to bind iSCSI to multiple VMK for multipathing and load-balancing.