OVS-L3PING(8)                    Open vSwitch                    OVS-L3PING(8)

       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

       ovs-l3ping  -c  <TunnelRemoteIP>,<InnerIP>[/<mask>],<RemoteInnerIP>  -t

       ovs-l3ping -c <TunnelRemoteIP>,<InnerIP>[/<mask>][:<ControlPort>[:<Dat‐
       aPort>]],<RemoteInnerIP>[:<ControlPort>[:<DataPort>]] [-b  <targetband‐
       width>] [-i <testinterval>] -t <tunnelmode>

       ovs-l3ping -h | --help

       ovs-l3ping -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 fur‐
       ther 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  <Data‐
       Port>,  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>]  or  --server

         Run  in server mode and create L3 tunnel with the client that will be
         accepting tunnel at <TunnelRemoteIP> address.   The  socket  on  <In‐
         nerIP>[:<ControlPort>]  will  be used to receive further instructions
         from the client.

       • -c         <TunnelRemoteIP>,<InnerIP>[/<mask>][:<ControlPort>[:<Data‐
         Port>]],<RemoteInnerIP>[:<ControlPort>[:<DataPort>]]    or   --client

         Run in client mode and create L3 tunnel with the server on <TunnelRe‐
         moteIP>.  The client will use <InnerIP> to generate test traffic with
         the server’s <RemoteInnerIP>.

       • -b <targetbandwidth> or --bandwidth <targetbandwidth>

         Target  bandwidth  for UDP tests. The <targetbandwidth> must be given
         in bits per second.  Use postfix M or K to alter the target bandwidth

       • -i <testinterval> or --interval <testinterval>

         How long each test should run. By default 5 seconds.

       • -t <tunnelmode> or --tunnel-mode <tunnelmode>

         Specify the tunnel type. This option must match on server and client.

       • -h or --help

         Prints a brief help message to the console.

       • -V or --version

         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

          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), uname(1).

       The Open vSwitch Development Community

       2016-2021, The Open vSwitch Development Community

3.3                              Feb 17, 2024                    OVS-L3PING(8)