Brocade Network Advisor IP User Manual v12.3.0 - Manual (Page 1190)

1138 Brocade Network Advisor IP User Manual
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IP historical performance monitoring
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• MIB Object.Delta — Assuming the MIB value polled in the current polling period is M(T1)
and the value polled in the previous polling period is M(T0), the MIB value to be used in the
expression is calculated using M(T1)- M(T0).
• MIB Object.Rate — Assuming the MIB value polled in the current polling period is M(T1)
and the value polled in the previous polling period is M(T0), the MIB value to be used in the
expression is calculated using (M(T1)- M(T0))/ (T1 – T0) (T0 and T1 are measured in
seconds).
The following example is the formula used to create the If%Errors expression, which calculates
the error percentage for input packets on an interface.
(iFInErrors / (ifHCInUcastPkts + ifInMulitcastPkts + ifInBroadcastPkts)) * 100
8. Click OK to accept your changes.
Deleting an expression
Complete the following steps to delete an expression.
1. Select Monitor > Performance > Expressions.
The Expressions dialog box displays.
2. Select the expression you want to delete from the Expressions list.
3. Click Delete.
A confirmation dialog box displays.
4. Click OK to delete the expression.
Viewing Historical Graphs/Tables
1. Right-click a row in a performance monitor on the dashboard and select Show Graph/Table.
OR
Select Monitor > Performance > Historical Graphs/Tables.
The Historical Graphs/Tables dialog box displays.
2. Select the Data Monitoring tab.
The main features are a tree structure and a graph area. You can collapse the tree structure to
expand the graph area.