Show/Monitor/List Commands
Command Reference
12-70
Counters
Displays the accumulated counters for the Ethernet, LAT and TCP/IP
protocols. The first seven lines of counters apply to Ethernet traffic in general.
The fields and error counters are explained below.
The values for failure reasons are expressed in hexadecimal codes and
represent binary masks of all of the errors that have occurred since the counters
were last zeroed. There are different numbers of significant digits for each
field; they represent the following:
Format: 0 0 h h (0 = unused, h = hex digit)
For example, a value of 000C in the Recv Failure Reasons represents a non-
aligned packet and FIFO overrun because 000C hex= 12 decimal= 0000 0000
0000 1100 binary. The binary bits are numbered right to left starting with zero,
so in this example, bits 2 and 3 are set.
Table 12-6: Counters Display Fields
Field
Meaning of Counter
Frames sent with xx
collisions
Gives a rough estimate of Ethernet traffic. In general, higher
traffic levels cause more collisions.
Bad Destination
Counts packets that the Server received for an unsupported
protocol. These are generally multicasts or broadcast pack-
ets; frequently seen unknown protocols include LAVC and
DECnet routing.
Buffer Unavailable
Counts packets lost due to an inability to allocate receive
space on the part of either the Ethernet controller (Net
Buffer) or the operating system (Sys Buffer).
Data Overrun
Shows packets that were dropped due to the controller’s
inability to transfer Ethernet data to memory. Generally, this
happens only under unusually heavy load conditions. Packets
dropped by the Ethernet hardware are retransmitted by the
LAT or TCP/IP protocol handlers.
Failure Reasons
Values represent a combination of the error reasons that have
occurred since the counters were last zeroed.
