Hello,   Without seeing it live, it's more difficult.  So you're running 10GbE from 8024->6224.  But the arrays are 1xGbE ports that don't support teaming.  So you're 10GbE initiator is too much for the 6224 switches.  The 6224 is going to try to buffer 10GbE into GbE, but will fail, and initiate a PAUSE frame if flowcontrol is enabled.  That will stop all traffic on that port.   When this happens during a sustained IO period, packets begin to timeout, and get retransmitted.  Causing performance and connection stability issues.  Re: Redundancy.  From your description seemed like ONE iSCSI HBA was on VLAN 20, and the other on VLAN21.  So when bound to different subnets if an HBA failed you'd lose that entire VLAN for that blade.     Re: Software binding.  When you bind with VMware, you loose routing as you discovered.  However,  you can use both SW AND iSCSI HBA for the different subnets.   You bind the SW iSCSI ideally to two NICs, then using the iSCSI HBA offload, bind them to the other subnet.     It's VERY important if you are using the Broadcom/(No Qlogic) adapter, make sure it has the current firmware and boot code.   Keeping the ESXi node up to date is also important, to get current Broadcom driver as well.   Regards,  Don   
I have two EqualLogic groups, two modular arrays in a chassis in one group, and two external arrays in another.  The chassis blades are VMWare hosts, using that storage as VM storage.  I've recently uplinked my isolated external group into the chassis (on another VLAN) to also use this group for VM storage.  On the VMWare hosts I added a path to a new disk on this external group and mounted the disk.  Immediately I started receiving disconnects of my modular group disks and new external group disk. I believe the IQN target name prefix (iqn.2001-05.com.equallogic), being the same in both groups, is conflicting at this point.  No other variables are the same and the networks are virtually separated.  As far as I can tell, there is no way to change the target name prefix for future disks, am I wrong about this? Thank you
VMWare two groups - IQN issues possibly