NS3000/iX Operations and Maintenance Reference Manual (36922-90039)

Appendix A 183
LINKCONTROL Command
NS 3000/iX LAN Link Statistics
Transmits no error. The Transmits no error field specifies the
number of frames that were successfully transmitted onto the medium.
This includes the number of frames that were successfully transmitted
on the first attempt, as well as frames that were successfully
transmitted after being deferred or that experienced one or more
collisions. The maximum value of this 32-bit field is 4294967295.
Receives no error. This field specifies the number of frames that were
successfully received over the medium. This includes the number of
frames that were successfully received on the first attempt, as well as
frames that were successfully received after being deferred or that
experienced one or more collisions. The maximum value of this 32-bit
field is 4294967295.
Transmits error. The Transmits error field specifies the number of
transmission errors sent across the link. The value in this field specifies
the number of frames which, due to errors on the link, were never
transmitted. Although this value is commonly greater than 5% of the
total number of frames transmitted, if it reaches or exceeds 5% of the
total number of frames, check the hardware or check to see if the LAN
is overloaded.
Receives error. The Receives error field specifies the number of
transmission errors that were received from the link. The value in this
field specifies the number of frames which were received, but were
corrupted due to errors on the link. This value includes all frames
which were discarded because of the setting of the current receive filter.
Out of Tx bufs (CIO card only). The Out of Tx bufs field specifies the
number of times that the LAN device adaptor (DA) reported to the
driver that no transmit buffers were available. The maximum value of
this 32-bit field is 4294967295.
Out of Rx bufs (CIO card only). The Out of Rx bufs field indicates the
number of times the LAN card reported to the driver that no receive
buffers were available. This indicates only that the next buffer space
was full and that the buffer pointer could not be incremented to an
available buffer (the buffer pointer is incremented only after the driver
requests the next frame). This also does not indicate that any frames
were lost, however if another frame arrives before a receive buffer is
made available, that frame will be lost. The value of this field should be
very low. Retransmissions will occur if the link is out of Rx bufs. The
maximum value for this 32-bit field is 4294967295.
Transmits deferred. The Transmits deferred field indicates the
number of frames that deferred to other traffic before being transmitted
onto the network. This means that the LAN card had to wait for carrier
to drop, and stay dropped for 9.6 nanoseconds, before attempting to
transmit the frame. This statistic only counts the number of frames
that were deferred and later transmitted without collision.