This is the distinguished name of the object on the far end of this internal link, i.e. the corresponding ServerIntFIo record on the IOM/server side. 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 it lets an admin jump directly from the switch-side view of a link to its IOM-side counterpart to compare both halves of the same connection. Following peerDn from this link's fabric-interconnect side is how an admin confirms a link issue reported at the fabric interconnect is also visible from the chassis's own IOM-side record.