After implementing VXLAN VTEPs in a VMware NSX deployment, an engineer discovers that the VXLAN tunnel does not appear to function across the physical network. A pair of Cisco Nexus 5596UP Switches connect the virtual network to the physical network. To permit the VXLAN tunnel to operate correctly, which action must the engineer take?
A. Upgrade Cisco Nexus to version 7.0 code.
B. Establish a dynamic routing protocol between the vSphere virtual router and the Cisco Nexus switches.
C. Remove storm control mechanisms that are blocking the establishment of the VXLAN tunnel.
D. Configure jumbo frame support on the Cisco Nexus switches.
E. Build a GRE tunnel to correctly encapsulate VXLAN between the networks.