bfd: Require bfd control packet received in forwarding_if_rx mode.

[sliver-openvswitch.git] / vswitchd / vswitch.xml

diff --git a/vswitchd/vswitch.xml b/vswitchd/vswitch.xml
index 5aec270..7f2fd58 100644 (file)
--- a/vswitchd/vswitch.xml
+++ b/vswitchd/vswitch.xml
@@ -1968,10 +1968,13 @@
        </column>
 
        <column name="bfd" key="forwarding_if_rx" type='{"type": "boolean"}'>
-          True to consider the interface capable of packet I/O as long as it
-          continues to receive any packets (not just BFD packets).  This
-          prevents link congestion that causes consecutive BFD control packets
-          to be lost from marking the interface down.
+          When <code>true</code>, traffic received on the
+          <ref table="Interface"/> is used to indicate the capability of packet
+          I/O.  BFD control packets are still transmitted and received.  At
+          least one BFD control packet must be received every 100 * <ref
+          column="bfd" key="min_rx"/> amount of time.  Otherwise, even if
+          traffic are received, the <ref column="bfd" key="forwarding"/>
+          will be <code>false</code>.
        </column>
 
        <column name="bfd" key="cpath_down" type='{"type": "boolean"}'>
@@ -2231,9 +2234,10 @@
           <ref column="other_config" key="cfm_extended"/> is true, the CFM
           module operates in demand mode.  When in demand mode, traffic
           received on the <ref table="Interface"/> is used to indicate
-          liveness.  CCMs are still transmitted and received, but if the
-          <ref table="Interface"/> is receiving traffic, their absence does not
-          cause a connectivity fault.
+          liveness.  CCMs are still transmitted and received.  At least one
+          CCM must be received every 100 * <ref column="other_config"
+          key="cfm_interval"/> amount of time.  Otherwise, even if traffic
+          are received, the CFM module will raise the connectivity fault.
         </p>
 
         <p>