
pkstat

        This command displays statistics for all attached packet driver
        interfaces.  If a driver supports the GET_STATISTICS command,
        more detailed status will be shown.

        Failed RX upcalls:  number of times no buffer space was available
                            to process an interrupt from the pkt driver.

        Failed TX requests: number of times the pkt driver refused to
                            accept a packet to be sent.

        All other categories displayed were provided by the packet driver.
