This read-write enumerated integer sets the administrator's desired enabled or disabled state for transparent bridging on a specific port pair, though the actual operational state also depends on dot1dStpPortState from the IETF Bridge MIB and ifOperStatus from MIB-II for each port. An administrator uses this to intentionally block transparent forwarding between two ports regardless of their individual link or STP states. For example, to prevent traffic from crossing between two segments that should remain isolated, the admin sets this object to disabled(2) for that specific port pair even though both ports are otherwise up and forwarding.