This read-only INTEGER reports, per its source description, the Host Logical Path status of an ESCON link entry: hlpNotEstab (not established), hlpEstab (established), or hlpError (an error condition). Admins check this per host-link-address/control-unit/partition combination to confirm a specific logical path between this adapter and a host partition is actually up and usable, since the physical port could show good fiber status while a specific logical path still fails to establish. For example, a link entry reporting hlpError(3) while the underlying port's fiber status looks fine would point to a logical-layer configuration mismatch (like an incorrect control unit or partition number) rather than a physical cabling problem.