How to perform a sniffer trace (CLI and Packet Capture)
When troubleshooting networks and routing in particular, it helps to look inside the headers of packets to determine if they are traveling along the expected route. Packet sniffing can also be called a network tap, packet capture, or logic analyzing.
| If your FortiGate unit has NP2/NP4 interfaces that are offloading traffic, this will change the sniffer trace. Before performing a trace on any NP2/NP4 interfaces, you should disable offloading on those interfaces. |