vswitchd: Update documentation for legacy_l3 type packets

The documentation needs to specify that for GRE tunnels there is no
support for legacy_l3 type packets in the kernel datapath.

Acked-by: William Tu <u9012063@gmail.com>
Signed-off-by: Greg Rose <gvrose8192@gmail.com>
Signed-off-by: Ben Pfaff <blp@ovn.org>

diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index efa1ef85e65e81603487fee58465b95a508aa5bc..b0b42e058c71c7208fb8f9d6f64533b1ef84ed75 100644 (file)
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -2699,6 +2699,12 @@
               represented as Ethernet frames for compatibility with legacy
               OpenFlow controllers that expect this behavior.
             </li>
+            <li>
+              The <code>legacy_l3</code> option is only available via the
+              user space datapath.  The OVS kernel datapath does not support
+              devices of type ARPHRD_IPGRE which is the requirement for
+              <code>legacy_l3</code> type packets.
+            </li>
             <li>
               If this option is <code>ptap</code>, the tunnel sends and
               receives any kind of packet.  Open vSwitch represents packets in