ofproto: Convert units correctly in ofport_open().

[cascardo/ovs.git] / FAQ

diff --git a/FAQ b/FAQ
index ce5df27..36e1fea 100644 (file)
--- a/FAQ
+++ b/FAQ
@@ -146,6 +146,7 @@ A: The following table lists the Linux kernel versions against which the
        1.7.x      2.6.18 to 3.3
        1.8.x      2.6.18 to 3.4
        1.9.x      2.6.18 to 3.8
+       1.10.x     2.6.18 to 3.8
 
    Open vSwitch userspace should also work with the Linux kernel module
    built into Linux 3.3 and later.
@@ -167,7 +168,7 @@ Q: What features are not available in the Open vSwitch kernel datapath
 
 A: The kernel module in upstream Linux 3.3 and later does not include
    tunnel virtual ports, that is, interfaces with type "gre",
-   "ipsec_gre", "gre64", "ipsec_gre64", "vxlan", or "capwap".  It is
+   "ipsec_gre", "gre64", "ipsec_gre64", or "vxlan".  It is
    possible to create tunnels in Linux and attach them to Open vSwitch
    as system devices.  However, they cannot be dynamically created
    through the OVSDB protocol or set the tunnel ids as a flow action.
@@ -820,6 +821,41 @@ A: Do you have a controller configured on br0 (as the commands above
    can refer to the answer there for more information.
 
 
+VXLANs
+-----
+
+Q: What's a VXLAN?
+
+A: VXLAN stands for Virtual eXtensible Local Area Network, and is a means
+   to solve the scaling challenges of VLAN networks in a multi-tenant
+   environment. VXLAN is an overlay network which transports an L2 network
+   over an existing L3 network. For more information on VXLAN, please see
+   the IETF draft available here:
+
+   http://tools.ietf.org/html/draft-mahalingam-dutt-dcops-vxlan-03
+
+Q: How much of the VXLAN protocol does Open vSwitch currently support?
+
+A: Open vSwitch currently supports the framing format for packets on the
+   wire. There is currently no support for the multicast aspects of VXLAN.
+   To get around the lack of multicast support, it is possible to
+   pre-provision MAC to IP address mappings either manually or from a
+   controller.
+
+Q: What destination UDP port does the VXLAN implementation in Open vSwitch
+   use?
+
+A: By default, Open vSwitch will use the assigned IANA port for VXLAN, which
+   is 4789. However, it is possible to configure the destination UDP port
+   manually on a per-VXLAN tunnel basis. An example of this configuration is
+   provided below.
+
+   ovs-vsctl add-br br0
+   ovs-vsctl add-port br0 vxlan1 -- set interface vxlan1
+       type=vxlan options:remote_ip=192.168.1.2 options:key=flow
+       options:dst_port=8472
+
+
 Controllers
 -----------