User`s guide

Note:
This Task describes adding a metric by clicking down the OID tree. It is somewhat faster to type the metric’s OID
in the MIB Object Id field and press ENTER or RETURN. To obtain the OIDs for the metrics that you want to
change, refer to your copy of the complete table definition (see Prerequisites for this task).
6. Process and reduce a day’s data.
Approximately six hours to one day after you changed the configuration of your PDB and collector (to give your
collector the time to collect data based on the new configuration), process and reduce data again. For details, see Section
1, Task 3: Create a Test PDB and Process, Reduce, and Report on the Data .
Note:
If you are considering keeping some additional string variables, time the process step. Then reverse the Kept
settings on these variables and time the process step six hours to a day later. You should be able to decide from this
whether you want to keep any of these variables.
The delay caused by getting values for these variables depends on your data volume, the number of nodes reporting data,
and your network’s responsiveness. The only way to evaluate the impact of keeping these variables is to time them in
your process step.
7. Check the results.
a. Examine the data.
From the main window, follow this path:
PDB Administration -> Examine PDB Data -> select your tables -> right mouse click -> View
Data
Use the scroll bars to move around in the data.
Depending on the vendor of a network device, some metrics are set by hand at configuration time. To assure that
they were typed correctly, check the configuration of your network devices to assure that the following variables
have appropriate values:
IFDESC, whose values are used to identify interfaces (if this string variable has Kept status of Yes in
your PDB)
IFSPEED, whose values are crucial in calculation utilization (if this string variable has Kept Status of
Yes in your PDB)
any other variables that were entered manually when the network devices were configured.
In table HN2IFT, the calculation of
ifUtilization
(IFUTIL) in IT Service Vision uses the value of
ifSpeed (IFSPEED). Frequently, ifSpeed is established for each interface of each network device manually
by the technician configuring the device. There is no automatic validity check; the value could be incorrect.
Using other configuration information that you have, you need to assure yourself that the values being reported
for ifSpeed are indeed correct.