1OVS-TCPDUMP(8)                   Open vSwitch                   OVS-TCPDUMP(8)
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NAME

6       ovs-tcpdump - Dump traffic from an Open vSwitch port using tcpdump
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SYNOPSIS

9       ovs-tcpdump -i <port> <tcpdump options>...
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DESCRIPTION

12       ovs-tcpdump  creates switch mirror ports in the ovs-vswitchd daemon and
13       executes tcpdump to listen against those ports. When  the  tcpdump  in‐
14       stance exits, it then cleans up the mirror port it created.
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16       ovs-tcpdump  will  not allow multiple mirrors for the same port. It has
17       some logic to parse the current  configuration  and  prevent  duplicate
18       mirrors.
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20       The -i option may not appear multiple times.
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22       It  is important to note that under Linux-based kernels, tap devices do
23       not receive packets unless the specific tuntap device has  been  opened
24       by  an  application.   This  requires  CAP_NET_ADMIN privileges, so the
25       ovs-tcpdump command must be run as a user with such  permissions  (this
26       is usually a super-user).
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OPTIONS

29       • -h or --help
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31         Prints a brief help message to the console.
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33       • -V or --version
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35         Prints version information to the console.
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37       • --db-sock <socket>
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39         The  Open  vSwitch  database socket connection string. The default is
40         unix:<rundir>/db.sock.
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42       • --dump-cmd <command>
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44         The command to run instead of tcpdump.
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46       • -i or --interface
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48         The interface for which a mirror port should be created, and  packets
49         should be dumped.
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51       • --mirror-to
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53         The name of the interface which should be the destination of the mir‐
54         rored packets. The default is mi<port>.
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56       • --span
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58         If specified, mirror all ports (optional).
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SEE ALSO

61       ovs-appctl(8),  ovs-vswitchd(8),  ovs-pcap(1),  ovs-tcpundump(1),  tcp‐
62       dump(8), wireshark(8).
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AUTHOR

65       The Open vSwitch Development Community
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68       2021, The Open vSwitch Development Community
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732.15                             Feb 21, 2021                   OVS-TCPDUMP(8)
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