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    Using the IP/MPLSView Client to Import Traffic Data

    This step assumes that you have already:

    In the following steps, IP/MPLSView takes this data as input and converts it into a concise binary format, organized by router in a set of “daily directories”, that is suitable for rapid aggregation and summary statistical reports. For example, it allows you to "roll-up" a week's worth of data into 24 hourly periods and display the hourly utilization based on the 95th percentile.

    1. Open the specification file corresponding to your network.
    2. Select Traffic > Import Traffic to open the Import Traffic Wizard.

      Figure 1: Introduction Page of the Import Traffic Wizard

      Introduction Page of the Import Traffic Wizard
    3. From the first page of the wizard, click Next > to continue.
    4. First of all, select the directory in which the set of daily directories are saved by clicking on the Browse button in the “Select Import Directory” section. Left click on the checkbox next to a directory to include that directory only. Right click on the checkbox to include that directory and all subdirectories within that directory.
    5. Next, under “Select Import Type,” select WANDLTraffic Data. If the Standalone Data Collector (SDC) (Also known as Traffic Data Collector) was used, then select the SDC options.

      Figure 2: Selecting Import Directory, Import Type, and Output Directory

      Selecting Import Directory, Import Type, and Output
Directory
    6. In “Specify Aggregate Directory,” select the directory in which the converted IP/MPLSView traffic files will be saved. When done, click Next > to continue.

      Figure 3: Selecting Dates from Daily Directories

      Selecting Dates from Daily Directories
    7. In the Select Dates tab of the next page, use <Ctrl> or <Shift>-click to select the dates of traffic you wish to aggregate. If selecting only one 24 hour period, select only one date. After the dates are highlighted, click on the > button to moved them to the selected dates table on the right. To select all dates, click on >> to move all of them to the other table. Then, click Next.

      Figure 4: Importing Aggregate Traffic Data

      Importing Aggregate Traffic Data
    8. Now the wizard will aggregate all the selected traffic data. Once aggregated, you will be able to import Aggregate Traffic Data from the aggregate directory specified earlier. This is shown above. Click Next to continue.

      Figure 5: Select a Computation Method

      Select a Computation Method
    9. Next, select a Computation Method: Max, Average, 80th percentile, 90th percentile, 95th percentile, 99th percentile. These are explained below.

    Computation Method


    Max: For each of the 24 hours, the maximum of the sample values within that hour is used.

    Average: For each of the 24 hours, the samples within that hour are averaged. If there are N samples within an hour, the result is the sum of the all the sample values divided by N.

    95th percentile: For each of the 24 hours, the 95th percentile value of the samples within that hour is used. The 95th percentile is computed from the equation:
    Average + 1.645 * stddev

    where Average refers to the average of the samples in that hour and stddev is the standard deviation. Another way of thinking about this is that 95 percent of the sample values lie below the calculated value.

    The corresponding equation for the 90th percentile is:
    Average + 1.282 * stddev

    ...and so on.

    When both fields are specified, click on the Next > button.


    Roll-up / Aggregation Defined


    The intention of traffic aggregation is to summarize the network traffic data that is generated across several days of collection. Selected days or a range of days can be specified to be included in the aggregated result. For example, one can aggregate all Mondays in the month of January, weekdays only, or aggregate all the days in an entire month, months, or year.

    For example, in the aggregated data for a particular interface, there are 24 values representing the 24 hours. For that particular interface, all sample points in hour 1 (In bps and Out bps values) across all the days are grouped together, all sample points in hour 2 across all the days are grouped together, and so on. The 95th percentile for hour 1 then takes into consideration as sample points, all the sample points for that interface during hour 1 on all the selected days.

    Note: Aggregate directories have the same format as the daily directories and can also be aggregated. This might be useful when performing the off-line traffic processing incrementally as more traffic data becomes available. However it is up to the user to remember exactly which days of traffic were aggregated - usually by supplying a meaningful name for the directory.

    If multiple days have been selected, then a “roll-up/aggregation” will be performed and the newly generated directory of binary files will be saved in the specified “Aggregate directory”. The status will be displayed in the final page of the wizard.

    Generating the interface/tunnel traffic files should be very quick, in a matter of minutes or less. Corresponding IP/MPLSView format ingress and egress interface traffic files or tunnel traffic files will be generated and loaded into the system if the user checks “Load traffic data”. Once completed, click on the Finish button. To access the Load/Util window, first make sure you switch to the appropriate layer if the option is available (Layer 3 for viewing Interface traffic and Tunnel Layerfor viewing Tunnel traffic). Then, select from the main menu bar, Traffic > Traffic Load to bring up the Load/Util window.

    Modified: 2016-11-08