Use the "pcap" command to display and configure the packet capture settings.
View settings
msh> pcap
Packet capture configuration
msh> pcap {on|off}
Specifying the port number to be obtained
msh> pcap port [0-65535]
Releasing the port number to be obtained
msh> pcap port all
Specifying the interface to be obtained
pcap interface [cdce0|ncmac0|athn0|wm0|ncmac1]