ovs-tcpdump(8) — Linux manual page


ovs-tcpdump(8)             Open vSwitch Manual            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

       --help Prints a brief help message to the console.

              Prints version information to the console.

              The Open vSwitch database socket connection string. The
              default is unix:/usr/local/var/run/openvswitch/db.sock

              The command to run instead of tcpdump.

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

              The name of the interface which should be the destination
              of the mirrored packets. The default is miINTERFACE

       --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).

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 2021-08-27.  (At that
       time, the date of the most recent commit that was found in the
       repository was 2021-08-20.)  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

Open vSwitch                     2.11.90                  ovs-tcpdump(8)