The PowerConnect line of switches do not have a feature that is equal to Cisco VRF.  The only way to separate a group of VLANs from another group of VLANs is to set up ACLs on the switch.  There is only one routing table for the whole switch.  There is no way to configure more than one, like you would with VRF. If you are interested in setting up ACLs on the 6224 here are some documents. www.dell.com/.../pwcnt_IP_ACLs.pdf www.dell.com/.../app_note_10.pdf
Hello Everyone; I'm trying to build a new infrastructure using Dell Poweredge 6224 switchs. What I'm trying to do, is to create a large set of vlans that are completely isolated. in Cisco world they call them vrf, I don't know what they call them in Dell world. would someone be able to direct me to what is used here and how it can be achived? Note Cisco VRF: allows you to have seperate route tables. So an ISP can keep its customers seperate on a common infrastructure. Thank you kindly.  
Cisco vrf alternative in Dell Powerconnect 62xx