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3.2.1 Show Counters
A counter is a number that shows how many times a certain event has oc-
curred. The server software keeps track of Ethernet and LAT message trans-
missions using counters. The SHOW COUNTERS data appears under two
headings: Ethernet Counters and Server Counters.
•
Ethernet Counters lists the counters for datagrams sent between the
server and all nodes on the Ethernet.
•
Server Counters lists the counters for messages transmitted between
the server and the LAT service nodes.
Two other commands are associated with counters: ZERO COUNTERS and
MONITOR. ZERO COUNTERS resets all the LAT counters and Ethernet
counters to zero. MONITOR generates a continuously updated SHOW
COUNTERS display. When you enter MONITOR, a SHOW COUNTERS dis-
play appears, and the counter totals change while the display is on your termi-
nal screen.
Counters can help you estimate MUXserver 100 traffic on the network for dif-
ferent time periods. For example, if you zero the counters at the start of each
day, you can gain information about day-to-day server usage.
Your network manager can use the data to calculate the average utilization of
the Ethernet and the service nodes. Also, the counters can be combined with
those from other servers to calculate the network's capacity to handle more
traffic.
SHOW COUNTERS is also useful for detecting possible network problems.
Use the following guidelines when you examine the SHOW COUNTERS
display.
For the Ethernet Counters:
•
Normally, the counters on the right hand side of the display should
be 0 except those for Block Check Error, Framing Error, and User
Buffer Unavailable. These should accumulate at a rate of less than 2
counts per day. It is normal to experience some errors when nodes
are added to the Ethernet.
•
The value for Frames Sent, Deferred should be less than 5% of the
value for Frames Sent.
•
The value for Frames Sent, 1 Collision and for Frames Sent, 2
+
Collisions should be less than 1
%
of that for Frames Sent.
CHJ,PTER 3 MANAGING AND MONITORING
9
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