X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;ds=sidebyside;f=FAQ;h=c43b0c8f3b3177cc55c30b4a714ebad90e9fd362;hb=ec988646afe6aee6a63d6894a3e9b50f715d5941;hp=27bd5b88f02217890e17d63d2fa645404c96be45;hpb=c37c03826ce05e0d8262180b102923574eea01eb;p=sliver-openvswitch.git
diff --git a/FAQ b/FAQ
index 27bd5b88f..c43b0c8f3 100644
--- a/FAQ
+++ b/FAQ
@@ -148,7 +148,8 @@ A: The following table lists the Linux kernel versions against which the
1.10.x 2.6.18 to 3.8
1.11.x 2.6.18 to 3.8
2.0.x 2.6.32 to 3.10
- 2.1.x 2.6.32 to 3.12
+ 2.1.x 2.6.32 to 3.11
+ 2.2.x 2.6.32 to 3.13
Open vSwitch userspace should also work with the Linux kernel module
built into Linux 3.3 and later.
@@ -157,18 +158,22 @@ A: The following table lists the Linux kernel versions against which the
It should build against almost any kernel, certainly against 2.6.32
and later.
-Q: What Linux kernel versions does IPFIX flow monitoring work with?
+Q: I get an error like this when I configure Open vSwitch:
-A: IPFIX flow monitoring requires the Linux kernel module from Open
- vSwitch version 1.10.90 or later.
+ configure: error: Linux kernel in
is version , but
+ version newer than is not supported (please refer to the
+ FAQ for advice)
-Q: Should userspace or kernel be upgraded first to minimize downtime?
+ What should I do?
- In general, the Open vSwitch userspace should be used with the
- kernel version included in the same release or with the version
- from upstream Linux. However, when upgrading between two releases
- of Open vSwitch it is best to migrate userspace first to reduce
- the possibility of incompatibilities.
+A: If there is a newer version of Open vSwitch, consider building that
+ one, because it may support the kernel that you are building
+ against. (To find out, consult the table in the previous answer.)
+
+ Otherwise, use the Linux kernel module supplied with the kernel
+ that you are using. All versions of Open vSwitch userspace are
+ compatible with all versions of the Open vSwitch kernel module, so
+ this will also work. See also the following question.
Q: What features are not available in the Open vSwitch kernel datapath
that ships as part of the upstream Linux kernel?
@@ -192,6 +197,19 @@ A: Tunnel virtual ports are not supported, as described in the
actions. On Linux kernels before 2.6.39, maximum-sized VLAN packets
may not be transmitted.
+Q: What Linux kernel versions does IPFIX flow monitoring work with?
+
+A: IPFIX flow monitoring requires the Linux kernel module from Open
+ vSwitch version 1.10.90 or later.
+
+Q: Should userspace or kernel be upgraded first to minimize downtime?
+
+ In general, the Open vSwitch userspace should be used with the
+ kernel version included in the same release or with the version
+ from upstream Linux. However, when upgrading between two releases
+ of Open vSwitch it is best to migrate userspace first to reduce
+ the possibility of incompatibilities.
+
Q: What happened to the bridge compatibility feature?
A: Bridge compatibility was a feature of Open vSwitch 1.9 and earlier.
@@ -1100,13 +1118,15 @@ A: The following table lists the versions of OpenFlow supported by
1.11 yes --- [*] [*] ---
2.0 yes [*] [*] [*] ---
2.1 yes [*] [*] [*] ---
- 2.2 yes [*] [*] [*] [*]
+ 2.2 yes [*] [*] [*] [%]
[*] Supported, with one or more missing features.
+ [%] Support is unsafe: ovs-vswitchd will abort when certain
+ unimplemented features are tested.
- Because of missing features, OpenFlow 1.1, 1.2, 1.3, and 1.4 must
- be enabled manually. The following command enables OpenFlow 1.0,
- 1.1, 1.2, and 1.3 on bridge br0:
+ Because of missing features, OpenFlow 1.1, 1.2, and 1.3 must be
+ enabled manually. The following command enables OpenFlow 1.0, 1.1,
+ 1.2, and 1.3 on bridge br0:
ovs-vsctl set bridge br0 protocols=OpenFlow10,OpenFlow11,OpenFlow12,OpenFlow13
@@ -1115,6 +1135,13 @@ A: The following table lists the versions of OpenFlow supported by
ovs-ofctl -O OpenFlow13 dump-flows br0
+ OpenFlow 1.4 is a special case, because it is not implemented
+ safely: ovs-vswitchd will abort when certain unimplemented features
+ are tested. Thus, for now it is suitable only for experimental
+ use. ovs-vswitchd will only allow OpenFlow 1.4 to be enabled
+ (which must be done in the same way described above) when it is
+ invoked with a special --enable-of14 command line option.
+
OPENFLOW-1.1+ in the Open vSwitch source tree tracks support for
OpenFlow 1.1 and later features. When support for a given OpenFlow
version is solidly implemented, Open vSwitch will enable that