To analyze and compare the parameters between two connected devices, you need to set the Device Queue to build devices in the Neighbor Pair pattern. In this pattern, Device Queue builds a device and one of its neighbors based on connected interfaces in the same one row. Thus, at runtime, the Qapp will read the device and its neighbor at one loop cycle to retrieve both MTU value of their connected interfaces for further analysis.

1.Click the icon from the taskbar and select New Qapp from the drop-down menu to open the Qapp Editor.

2.At the Start node, use the default option Map in the Define Qapp Device Input field. It means that the Qapp takes all devices visible on the map as the input devices.

3.Extend a Canvas node from the Start node and double-click the Canvas1 node to enter the Canvas editor.

4.At the Device Queue node, configure the following settings:

1)Select Neighbor Pair from the Device From drop-down list.

2)Select the neighbor type. By default, IPV4 L3 Topology is selected.

5.Extend a Device(this) node after the Device Queue node. At the this node, the this column is selected by default. To retrieve data from a device’s neighbor at the same time, you need to extend one more Device (nbr) node for neighbor devices.