Measurement tools for LAN connections

The following measurement tools exist for LAN connections:

• BCMON commands

• NETSTAT command

• openSM2 reports

BCMON commands

Using the BCMON command, you start cyclic BCAM monitoring and output the desired values at regular intervals. The values are displayed on the console and also written to the log file ($SYSAUDIT.SYS.CONSLOG.<date>.<counter>), so that the values can be evaluated later. See also the “BCAM” manual [2 (Related publications)].

Simple example for BCMON

This example shows how the throughput of a specific connection is measured. The total throughput can be measured by not specifying LINE=.

/BCMON MODE=ON,RECORD=L2,LINE=LINEFCGB,SEC=30 (command on the console)

Every 30 seconds the measured values accrued in this time are output, e.g.:

<C %BCAM-000... %  BCA0B15 Line LINEFCGB: 
BYTES=(I=929.088.154/O=930.140.116); I/O'S=(I=50.259/O=33.216); 
PACKETING=(I=4,60/O=6,98)                                                1.
<C %BCAM-000... %  BCA0B16 Line LINEFCGB: UNICASTs=(I=231.372/O=231.981); 
MULTICASTs=(I=0/O=0)                                                     2.
<C %BCAM-000... %  BCA0B17 Line LINEFCGB: I/O ERRORs=(I=0/O=0); 
WAIT+RETRIES=0; DISCARDS=(I=0/O=0); PROTOCOL ERRORs=(I=0/O=0); 
L2 PROTOCOLs=(I=0/O=0)                                                   3.

1. Line LINEFCGB : Name of the line
   BYTES=(I= ): Number of bytes received
   BYTES=(O= ): Number of bytes sent
   I/O'S=(I= ): Number of inputs
   I/O'S=(O= ): Number of outputs
   PACKETING=(I= ): Number of messages per input
   PACKETING=(O= ): Number of messages per output

2. Line LINEFCGB : Name of the line
   UNICASTs=(I= ): Number of UNICASTs received
   UNICASTs=(O= ): Number of UNICASTs sent
   MULTICASTs=(I= ): Number of MULTICASTs received
   MULTICASTs=(O= ): Number of MULTICASTs sent

3. Message BCA0B17 is merely an error counter

NETSTAT command

The NETSTAT program can be used to request information about applications, connections, routing data and network interfaces. The functionality of the NETSTAT program is also available via BCAM command SHOW-NET-STATISTICS/NETSTAT. The NETSTAT program can be used under any user ID without any privileges with the SHOW-NET-STATISTICS/NETSTAT command. See also the “BCAM” manual [2 (Related publications)].

Simple example for NETSTAT

This example shows how the total throughput is measured using NETSTAT.

/NETSTAT INTERFACE-SUM-RATE=*YES,WAITTIME=30 (user command)

After the load messages and a display of all the values accrued to date, the standardized values for the inputs and outputs are output every 30 seconds (in each case in packets and bytes):

INTERFACE sum rate                           Date: Fri Nov 23 10:20:35 2012
  PacketsIn       BytesIn    ErrorsIn  PacketsOut      BytesOut  ErrorsOut
   58255627 1979306135058           0    70849955  516799149494         0
INTERFACE sum rate                           Date: Fri Nov 23 10:21:05 2012
  dt(s)    PktsIn/s   KByteIn/s   ErrIn   PktsOut/s  KByteOut/s  ErrOut
 30.007      363.35       24.35       0      265.17      552.28       0
 30.005      345.44       22.70       0      229.20      476.90       0
 30.005      319.58       20.66       0      194.33      404.37       0

openSM2 reports

The following SM2 monitoring programs supply important information on networking (see the “openSM2” manual [18 (Related publications)]):

• BCAM-CONNECTION
  Monitored data on connection sets

• CHANNEL-IO
  Monitored data on the channel load and channel transfer rates.

• PERIODIC TASK
  Monitored data on tasks: utilization of the BCAM tasks (e.g. BCAM and BCA0)

• RESPONSETIME
  Monitored data on response times, think times, transactions times, and wait times in the BCAM pool

• SAMPLING-DEVICE
  Monitored data on I/Os, data volume and utilization of devices

• TCP-IP
  Monitored data on TCP/IP connections