can E5600 provide redundancy/ failover functions?

[heightsnj]

I feel E series doesn't provide such functions, it will be dependending on iSCSI hosts multipathing. But, I would like to confirm experts here.

There are two controllers, and 2 ports on each one. 

[SpindleNinja]

You need host side multipathing for iSCSI and FC failover in general.  Neither eSeries or FAS has LIFs (FC or iSCSI) that failover to the other controller during failover.  

[elementx]

Everything depends on something.  Using MPIO on the host is common to most arrays.

E-Series provides full redundancy (controller, controller port, disk)