Is there any recommendation from netapp how to setup a cisco switch using Vlan's with virtual interfaces. I have a FAS2020 with two controllers, and two ports each connected to the Cisco switch (3750). I have configured the filer using a virtual interface (vif1) for the both network ports (e0a, e0b). All is OK, but the both controllers can't ping each other and a cluster takeover and giveback took really long (15min). When I disconnect one of the network ports of each controller (f.e. e0b), the ping between both is OK and the cluster takeover and giveback is running perfect within seconds. So, I think there is a misconfig within the Cisco switch.