This field records the Fibre Channel link speed an admin has explicitly configured (as opposed to auto-negotiated) for this FC monitoring session's destination port. For the physical FC port designated to receive the mirrored/copied traffic for an FC monitoring session, when this is pinned to a fixed speed rather than left on auto, the analyzer device on the far end of this specific link must support that exact FC speed or the mirrored-traffic capture will simply fail to establish. A value of '8gbps' here would mean this destination link is pinned to 8Gb FC regardless of what the analyzer's port might otherwise negotiate to.