I have read the beasic Design documents on Brocade's site, but none really explain the why or how. I have designed a new data center with a VDX fabric. Upstream, I connect it to a Cisco core. Downstream, I have HP Blade Chassis Cisco switches, VMware servers and an ICX stack. The ICX stack has management connections for ILO ports and other such connections. I connect all of my campus-wide services to the VDX fabric, such as VPN, DNS/DHCP, Wireless Controller. I was informed that I should not connect my core services to the fabric. Can anyone give me some guidance? I don't understand why I should not connect those core core services to the fabric? Should I connect the ICX stack directly to the core instead of through the VDX fabric? Any hgelp is greatly appreciated.