DHCP SNOOPING mit DHCP Relay

[Poundi]

Szenario:

DHCP Relays on the router in the Core-Network for multiple VLANs and I want to use DHCP-Snooping at the Access-Layer with the ArubaOS-Switch 2530-Series. (DHCP-Server is running on VM)

For DHCP-Snooping i have to configure "dhcp-snooping authorized-server". For example the DHCP-Server.

Did i have to set the interface-adresses from the VLANs with DHCP-Relays as "dhcp-snooping authorized-server" ,too?

Cause i mean DHCP-Snooping acts at Layer 2.

Thanks 4 answers. 

[Vince-Whirlwind]

I had Procurve edge switches and a 3COM core - I had to add in the 3COM cores as authorised DHCP servers.

[Poundi]

The Core is a 3COM, too. So i have to add all vlan interfaces from the core? 

Would be great if you  could add the DHCP-Servers only... :/

[Vince-Whirlwind]

A 3COM core switch *is* a DHCP server.

Unlike other vendors, it doesn't just proxy the DHCP requests through, it actually acts as a DHCP server itself.

You shouldn't have too much work to do - your Access switches only need the VLAN interfaces for their local Data and Voice VLANs - should only be two there to do, right?

[Poundi]

There will be some more Interfaces to add, cause we use 802.1x with RADIUS to set the VLAN on the access port. 

The work isnt a problem. I just want to understand the configuration :) 

Thanks 4 your reply.