Initial Setup of Equalogic PS4000

I have reset a PS4000 back to default and am now configuring it for the first time.

I gave the unit a member name after which I am prompted with

Network interface [eth0]:

Whether I press [enter] or type eth0 or eth1 I get the response

*** Failed to set IP address. Please try again

Do you want to re-enter the IP address (yes | no)

I believe the prompt I am after is "IP address for Network interface []

What am I missing please ?