Please search for configuraration guides for your network switches or platform (like Aruba OS AOS or Aruba CX AOS-CX).
Your desired function is DHCP Snooping.
In General (if you do not use Aruba Central) you have to configure trusted Ports in a first step, where you are expecting to receive DHCP offers.Then you enable dhcp on a per vlan basis and/or in general. I'm not sure in case of the different Aruba products.Edit: on Aruba CX it has to be enabled globally AND per vlan. I do not se an option to enable it for all configured vlans...
For Aruba CX I found this: AOS-CX 10.06 IP Services Guide 6300, 6400 Switch Series - DHCP snooping (arubanetworks.com)
Or a community entry: How To Configure DHCP Snooping (arubanetworks.com)
In this thread someone says configuring an explicit trusterd (authorized) dhcp server IP can make trouble, so please do not use it: DHCP Snooping - Why would I want to protect all the configured VLANs | Wired Intelligent Edge (arubanetworks.com)
I guess it would be a good start with only one Switch, for example the Switch you are connected to.
And I guess it would be only necessary to configure dhcp-snooping or dhcpv4-snooping on the client access-layer switches only.
If you do not encounter any problems with dhcp-snooping, you can think of implementing arp-protection (AOS-S) or arp inspection (AOS-CX) as an additional protection tool. It prevents hosts without an DHCP IP IP from accessing the network. So be careful. If you're using manual configured IPs on clients then do not use it. And no not use it on server access switches^^
AOS-S:conf tarp-protect trust Trk1arp-protect vlan 998arp-protectend!sh arp-protectsh arp-protect statistics 998!AOS-CX:interface lag 200 arp inspection trust exit! Attention, with configuring vlans arp-inspection will be active !vlan 998 arp inspection exit!sh arp inspection ?sh arp inspection statistics vlan
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