[ovs-dev] [PATCH] INSTALL: Mention conflict with NET_IPGRE setting.

[Ben Pfaff]

I found when reconfiguring my kernel that if I turned on NET_IPGRE, GRE
tunnels no longer worked.  (I might not understand this issue.)

Signed-off-by: Ben Pfaff <blp at nicira.com>
---
 INSTALL |    5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/INSTALL b/INSTALL
index bfd053b..8b2097f 100644
--- a/INSTALL
+++ b/INSTALL
@@ -67,8 +67,9 @@ install the following:
       obsolete and not needed.)
 
       To use GRE tunneling on Linux 2.6.37 or newer, kernel support
-      for GRE must be compiled in or available as a module
-      (CONFIG_NET_IPGRE_DEMUX).
+      for GRE demultiplexing (CONFIG_NET_IPGRE_DEMUX) must be compiled
+      in or available as a module.  GRE tunnels over IP (NET_IPGRE)
+      must not be compiled in and must not be loaded as a module.
 
       To configure HTB or HFSC quality of service with Open vSwitch,
       you must enable the respective configuration options.
-- 
1.7.10.4