Provided by: openvswitch-test_2.5.0-0ubuntu1_all bug


       ovs-l3ping - check network deployment for L3 tunneling problems


       ovs-l3ping -s TunnelRemoteIP,InnerIP[/mask] -t tunnelmode
       ovs-l3ping -s TunnelRemoteIP,InnerIP[/mask][:ControlPort] -t tunnelmode

       ovs-l3ping -c TunnelRemoteIP,InnerIP[/mask],RemoteInnerIP -t tunnelmode
       ovs-l3ping                                                                              -c
       [-b targetbandwidth] [-i testinterval] -t tunnelmode

       Common options:
              [-h | --help] [-V | --version]


       The  ovs-l3ping  program may be used to check for problems that could be caused by invalid
       routing policy, misconfigured firewall in the tunnel path or a bad NIC driver.  On one  of
       the nodes, run ovs-l3ping in server mode and on the other node run it in client mode.  The
       client and server will establish L3 tunnel, over which client will  give  further  testing
       instructions.  The  ovs-l3ping  client  will  perform  UDP  and  TCP  tests.  This tool is
       different from ovs-test that it encapsulates XML/RPC control connection over  the  tunnel,
       so there is no need to open special holes in firewall.

       UDP  tests  can  report  packet loss and achieved bandwidth for various datagram sizes. By
       default target bandwidth for UDP tests is 1Mbit/s.

       TCP tests report only achieved bandwidth, because kernel TCP  stack  takes  care  of  flow
       control and packet loss.

   Client Mode
       An  ovs-l3ping client will create a L3 tunnel and connect over it to the ovs-l3ping server
       to schedule the tests. TunnelRemoteIP is the peer's  IP  address,  where  tunnel  will  be
       terminated.  InnerIP is the address that will be temporarily assigned during testing.  All
       test traffic originating from this IP address to the RemoteInnerIP will be  tunneled.   It
       is  possible  to  override  default  ControlPort  and  DataPort,  if  there  is  any other
       application that already listens on those two ports.

   Server Mode
       To conduct tests, ovs-l3ping server must be running.  It is required that both client  and
       server  InnerIP  addresses are in the same subnet.  It is possible to specify InnerIP with
       netmask in CIDR format.


       One of -s or -c is required.  The -t option is also required.

       -s TunnelRemoteIP,InnerIP[/mask][:ControlPort]
       --server TunnelRemoteIP,InnerIP[/mask][:ControlPort]
              Run in server mode and create L3 tunnel with the  client  that  will  be  accepting
              tunnel at TunnelRemoteIP address.  The socket on InnerIP[:ControlPort] will be used
              to receive further instructions from the client.

              Run in client mode and create L3 tunnel with the  server  on  TunnelRemoteIP.   The
              client will use InnerIP to generate test traffic with the server's RemoteInnerIP.

       -b targetbandwidth
       --bandwidth targetbandwidth
              Target  bandwidth  for  UDP  tests.  The  targetbandwidth must be given in bits per
              second. It is possible to use  postfix  M  or  K  to  alter  the  target  bandwidth

       -i testinterval
       --interval testinterval
              How long each test should run. By default 5 seconds.

       -t tunnelmode
       --tunnel-mode tunnelmode
              Specify the tunnel type. This option must match on server and client.

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

              Prints version information to the console.


       On  host  start  ovs-l3ping  in  server mode.  This command will create a
       temporary GRE tunnel with the host and assign as the inner  IP
       address, where client will have to connect:

              ovs-l3ping -s, -t gre

       On  host  start  ovs-l3ping  in  client  mode.   This  command  will  use as the local inner IP address and will connect  over  the  L3  tunnel  to  the
       server's inner IP address at

              ovs-l3ping -c,, -t gre


       ovs-vswitchd(8),  ovs-ofctl(8),  ovs-vsctl(8),  ovs-vlan-test(8), ovs-test(8), ethtool(8),