ovs-tcpdump(8) — Linux manual page


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

NAME         top

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

SYNOPSIS         top

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

DESCRIPTION         top

       ovs-tcpdump creates switch mirror ports in the ovs-vswitchd
       daemon and executes tcpdump to listen against those ports. When
       the tcpdump instance exits, it then cleans up the mirror port it

       ovs-tcpdump will not allow multiple mirrors for the same port. It
       has some logic to parse the current configuration and prevent
       duplicate mirrors.

       The -i option may not appear multiple times.

       It is important to note that under Linux-based kernels, tap
       devices do not receive packets unless the specific tuntap device
       has been opened by an application.  This requires CAP_NET_ADMIN
       privileges, so the ovs-tcpdump command must be run as a user with
       such permissions (this is usually a super-user).

OPTIONS         top

-h or --help

         Prints a brief help message to the console.

       • -V or --version

         Prints version information to the console.

       • --db-sock <socket>

         The Open vSwitch database socket connection string. The default
         is unix:<rundir>/db.sock.

       • --dump-cmd <command>

         The command to run instead of tcpdump.

       • -i or --interface

         The interface for which a mirror port should be created, and
         packets should be dumped.

       • --mirror-to

         The name of the interface which should be the destination of
         the mirrored packets. The default is mi<port>.

       • --span

         If specified, mirror all ports (optional).

SEE ALSO         top

       ovs-appctl(8), ovs-vswitchd(8), ovs-pcap(1), ovs-tcpundump(1),
       tcpdump(8), wireshark(8).

AUTHOR         top

       The Open vSwitch Development Community

COPYRIGHT         top

       2016-2021, The Open vSwitch Development Community

COLOPHON         top

       This page is part of the Open vSwitch (a distributed virtual
       multilayer switch) project.  Information about the project can be
       found at ⟨http://openvswitch.org/⟩.  If you have a bug report for
       this manual page, send it to bugs@openvswitch.org.  This page was
       obtained from the project's upstream Git repository
       ⟨https://github.com/openvswitch/ovs.git⟩ on 2023-12-22.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2023-12-21.)  If you discover any rendering
       problems in this HTML version of the page, or you believe there
       is a better or more up-to-date source for the page, or you have
       corrections or improvements to the information in this COLOPHON
       (which is not part of the original manual page), send a mail to

3.2.90                        Dec 22, 2023                OVS-TCPDUMP(8)