This is the full distinguished name uniquely locating, on the Fabric Interconnect side, the record for this internal chassis backplane link. It matters on the same internal chassis backplane link, but the record kept on the Fabric Interconnect (switch) side rather than the IOM/server side because a link problem often needs checking from both ends, and this DN is the address of the switch-side half of the same physical connection whose server-side half is a separate ServerIntFIo object. A DN under fabric-B referencing chassis 4 on this link's fabric-interconnect side is what an admin queries to see how the fabric interconnect itself views this backplane connection.