Hi,
following links provides you with guides, which translate Cisco to ArubaOS-Swicth CLI and vice versa.
If you know the cisco command, you'll find aruba command...
Very detailed.
https://community.arubanetworks.com/t5/Wired-Intelligent-Edge-Campus/ArubaOS-Switches-CLI-reference-V3-3/td-p/291834
configure IP in a VLAN just to reach a client via layer2 is not needed. IP is only needed for routing or to access switch management in a certain vlan.
I have some other guides, dealing with interoperability between cisco and Aruba-Switches. (PVST vs MST and so on) But I cannot share them, cause they were provided to HP Employees and partners solely. Maybe you can ask your aruba partner for this information or assistance?
I searched a little, but didn't find links to download these guides for customers...
Regards, Jö