DFL-800:/> pcapdump -?
pcapdump (pc). Packet capturing.

Usage:
  pcapdump                        Show capture status
  pcapdump -start [<interface(s)>] [-size=<value>] [-snaplen=<value>] [-count=<value>] [-out] [-out-nocap] [-eth=<Ethernet Address>] [-ethsrc=<Ethernet Address>]
           [-ethdest=<Ethernet Address>] [-ip=<IP4 Address>] [-ipsrc=<IP4 Address>] [-ipdest=<IP4 Address>] [-port=<0...65535>] [-srcport=<0...65535>]
           [-destport=<0...65535>] [-proto=<0...255>] [-icmp] [-tcp] [-udp] [-promisc]
                                  Start capture
  pcapdump -stop [<interface(s)>]
                                  Stop capture
  pcapdump -status                Show capture status
  pcapdump -show [<interface(s)>]
                                  Show a captured packets brief
  pcapdump -write [<interface(s)>] [-filename=<String>]
                                  Write the captured packets to disk
  pcapdump -wipe                  Remove all captured packets from memory
  pcapdump -cleanup               Remove all captured packets, release capture mode and delete all written capture files from disk

Option reference:
  -cleanup                     Remove all captured packets, release capture mode and delete all written capture files from disk.
  -count=<value>               Number of packets to capture.
  -destport=<0...65535>        Destination TCP/UDP port filter.
  -eth=<Ethernet Address>      Ethernet address filter.
  -ethdest=<Ethernet Address>  Ethernet destination address filter.
  -ethsrc=<Ethernet Address>   Ethernet source address filter.
  -filename=<String>           Filename for capture file.
  -icmp                        ICMP filter.
  -ip=<IP4 Address>            IP address filter.
  -ipdest=<IP4 Address>        Destination IP address filter.
  -ipsrc=<IP4 Address>         Source IP address filter.
  -out                         Realtime packet brief dumped to console.
  -out-nocap                   Unbuffered (not stored in memory) realtime packet brief dumped to console.
  -port=<0...65535>            TCP/UDP port filter.
  -promisc                     Set iface in promiscuous mode.
  -proto=<0...255>             IP protocol filter.
  -show                        Show a captured packets brief.
  -size=<value>                Size (kb) of buffer to store captured packets in memory (default 512kb).
  -snaplen=<value>             Maximum length of each packet to capture.
  -srcport=<0...65535>         Source TCP/UDP port filter.
  -start                       Start capture.
  -status                      Show capture status.
  -stop                        Stop capture.
  -tcp                         TCP filter.
  -udp                         UDP filter.
  -wipe                        Remove all captured packets from memory.
  -write                       Write the captured packets to disk.