About the Capacity Viewer Page

Tasks You Can Perform on the Links Tab

• Calculate link utilization—Link utilization is calculated to understand how much of the available network bandwidth is being used so you can detect congestion, plan upgrades, and ensure optimal performance.

  To calculate link utilization:

  1. Enter the required parameters such as date range, statistics, and aggregation interval by referring to Table 1

  2. Table 1: Fields on the Links Tab

     Field	Description
     Date Range	Enter the date and time range to retrieve link utilization data for all links in your network. You can select predefined options such as one week or one month or enter a custom range as needed.
     Statistics	Select one of the following aggregation statistic options: 90th, 95th, 99th Percentile (X percentile)—Aggregation is based on the selected percentile. The ‘X’ percentile is the value at which ‘X’ percent of all the samples taken in the previous sampling period lie at or below the calculated value. The default is 95th percentile because it reflects typical busy‑hour load and aligns with ISP and data‑center billing practices. Use 99th percentile only for latency or SLA sensitive cores to map delay to safe utilization. Average—For each interval, the samples within that interval are averaged. If there are N samples for a particular interval, the result is the sum of all the sample values divided by N. Max—For each interval, the maximum of the sample values within that interval is used. Min—For each interval, the minimum of the sample values within that interval is used.
     Aggregation Interval	Routing Director collects data from your network devices and aggregates the data., Select one of the following intervals at which the data aggregation must happen: Day—Each day is considered as one aggregation interval and one aggregated data point is displayed per day. Hour—Each hour is considered as one aggregation interval and one aggregated data point is displayed per hour.

  3. Click Calculate Utilization and view the utilization data for all links.

• Analyze and review link utilization—After calculating utilization, view the link utilization table to identify overutilized and underutilized links and details such as source and destination devices, IP addresses and configured bandwidth. Based on this analysis, take corrective actions as needed. For example, if certain links are overutilized, adjust traffic distribution by modifying bandwidth in the Demands tab.

  For information on each field in a Links tab, see Fields on the Links Table

Tasks you can Perform on the Demands Tab

• Modify demands—A demand represents the volume of traffic flowing between a source node and a destination node over the label-switched paths (LSPs), expressed as a bandwidth value. Select the required demands to modify demands and evaluate its impact on network capacity after creating and importing a network model. You can update all or selected demands by increasing, decreasing, or setting bandwidth values using percentages or units such as bps, Kbps, Mbps, or Gbps. You can also edit individual demand values directly in the New Bandwidth column in the Demands table. Click on Update Demands to update the demands. You are redirected to the Path Computation page, where you can select the appropriate combination of tunnels and demands for path computation and update the model. After updating the model click the Reload icon to apply the changes and update the network topology.

• View demand details—View detailed information for each demand, including source and destination devices, IP addresses, and current and updated bandwidth values. Use this information to understand traffic flow and assess how bandwidth modifications impact the network.

  For information on each field in a Demands tab, see Fields on the Demands Table

Field Descriptions

Fields on the Links Table lists the fields on the Links tab.

Fields on the Demands Table lists the fields on the Demands tab.