This counter tracks packets dropped because the router found a bad packet buffer length. This points to a framing/length-field error in the packet's internal buffer bookkeeping -- distinct from a bad IP checksum -- so it's the specific counter that isolates a receive-buffer or memory-handling defect rather than RF-induced bit errors on the link. A technician chasing intermittent packet loss on an otherwise clean-looking RF link (good Eb/No, no CRC errors) would check this counter next, since a rising value here without corresponding satellite-layer errors suggests a router-internal buffering issue rather than the satellite path.