Dell Intel PRO Family of Adapters - Manual (Page 4)

What is VN to VN?
FCoE VN to VN (VN2VN) support is a new proposal standard by T11 for connecting two end-nodes (ENodes) directly using
FCoE. An ENode can create a VN2VN virtual link with another remote ENode without connecting to FC or FCoE switches (FCFs)
in between, so neither port zoning nor advance fibre channel services are required. Storage software controls the access and
security of LUNs using LUN masking. The VN2VN fabric may have a lossless Ethernet switch between the ENodes. This allows
multiple ENodes to participate in creating more than one VN2VN virtual link in the VN2VN fabric. VN2VN has two operational
modes: Point to Point (PT2PT) and Multipoint.
NOTE: The mode of operation is used only during initialization.
Point to Point (PT2PT) Mode
In Point to Point mode, there are only two ENodes. They are connected either directly or thru a lossless Ethernet switch: