The firewall trace source enable command enables the function of automatically capturing the key fields of packets.
The undo firewall trace source enable command disables the function.
By default, the function is enabled.
When the CPU usage of the FW that has the function enabled reaches threshold-value specified in the cpu-usage threshold command, the FW will automatically capture the key fields (key fields in the IP header and TCP/UDP/ICMP header) of packets of a new session and the key fields and packet loss types of discarded packets and record them to the diagnosis log file log.dblg.