Hi, 

Can someone please explain the correct port failover behaviour please?

Here's the scenario: First iSCSI switch is rebooted/or fails: The active and standby CM now both have connections to the single remaining iSCSI switch i.e. vertical port failover. Great so far.

Q: Once the first iSCSI switch comes back on line should the standby CM port failback to the first switch?

Currently it doesn't fail back, is the correct? If the second switch is now rebooted or fails the array will lose connectivity to the hosts.