FAQ: Add question and answer about PPP.

We've had this question a few times lately.

Signed-off-by: Ben Pfaff <blp@nicira.com>

diff --git a/FAQ b/FAQ
index 1a2c4f8..d94c158 100644 (file)
--- a/FAQ
+++ b/FAQ
@@ -447,6 +447,12 @@ A: Wireless base stations generally only allow packets with the source
    point, so the same problems will show up with the Linux bridge or
    any other way to do bridging.
 
    point, so the same problems will show up with the Linux bridge or
    any other way to do bridging.
 

+Q: I can't seem to add my PPP interface to an Open vSwitch bridge.
+
+A: PPP most commonly carries IP packets, but Open vSwitch works only
+   with Ethernet frames.  The correct way to interface PPP to an
+   Ethernet network is usually to use routing instead of switching.
+

 Q: Is there any documentation on the database tables and fields?
 
 A: Yes.  ovs-vswitchd.conf.db(5) is a comprehensive reference.
 Q: Is there any documentation on the database tables and fields?
 
 A: Yes.  ovs-vswitchd.conf.db(5) is a comprehensive reference.