Link Utilization Analysis

With NorthStar Planner’s link object, it is easy to determine the amount of total bandwidth, used bandwidth, and available bandwidth for each class on the link. In the screenshot below, each class is reserved 25% of the bandwidth on each interface on the link. For the A-Z interface, 100 Mb of bandwidth is being used for DiffServ-aware LSPs that carry CT-2 and CT-3 traffic. For the Z-A interface, 5 Mb of bandwidth is being used from the CT-0, CT-1, and CT-2 partitions.

Figure 1: Link Capacity Window Showing Tunnel Traffic

It should be noted that the available bandwidth being reported in the window above is the available bandwidth for tunnels with a pre-emption priority of seven. In other words, the model assumes that none of the existing tunnels currently residing on the link can be bumped off the link by another tunnel.