vswitch.xml: Document that active-backup works OK with multiple switches.

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

diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index 480fd63b6682d333ba5af545bdfd5bba094c6c9f..4a0225c5cae8b8179215f415d4ac9caa09bf3d70 100644 (file)
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -820,7 +820,8 @@
         <dt><code>active-backup</code></dt>
         <dd>
           Assigns all flows to one slave, failing over to a backup slave when
-          the active slave is disabled.
+          the active slave is disabled.  This is the only bonding mode in which
+          interfaces may be plugged into different upstream switches.
         </dd>
       </dl>