Administrator's Guide

Figure 1 Path daemon flowchart
2.4 Path diagnostics
The path diagnostics application determines and verifies the path taken by a specific packet from
a source host to destination host.
• Evaluates flows configured across the switches in the control domain for diagnosis.
• Creates ‘Observation posts’ on every switch in the path that the packet would take.
• Tallys packet_in messagess from the observation posts to detect where a path is broken.
• Lists neighbors for any given device.
12 Understanding the embedded applications