X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=FAQ;h=cd3241a30a0b96d11f57f2dcdb90c90c5b3a77b9;hb=1d5aaa61fa8ca68f487e8b578b7aa99a0bbd1f26;hp=0a081ff7da29a15dfe2e966ce88a965f0308f57e;hpb=23a0330f7a56a7229f0e8cd7371bdd2d2ec1a9f8;p=sliver-openvswitch.git

diff --git a/FAQ b/FAQ
index 0a081ff7d..cd3241a30 100644
--- a/FAQ
+++ b/FAQ
@@ -89,10 +89,9 @@ A: Distributed vswitch applications (e.g., VMware vNetwork distributed
    environments: OpenFlow, which exposes flow-based forwarding state,
    and the OVSDB management protocol, which exposes switch port state.
    In addition to the switch implementation itself, Open vSwitch
-   includes tools (ovs-controller, ovs-ofctl, ovs-vsctl) that developers
-   can script and extend to provide distributed vswitch capabilities
-   that are closely integrated with their virtualization management
-   platform.
+   includes tools (ovs-ofctl, ovs-vsctl) that developers can script and
+   extend to provide distributed vswitch capabilities that are closely
+   integrated with their virtualization management platform.
 
 Q: Why doesn't Open vSwitch support distribution?
 
@@ -1255,9 +1254,11 @@ A: To debug network behavior problems, trace the path of a packet,
 
 Q: How do I make a flow drop packets?
 
-A: An empty set of actions causes a packet to be dropped.  You can
-   specify an empty set of actions with "actions=" on the ovs-ofctl
-   command line.  For example:
+A: To drop a packet is to receive it without forwarding it.  OpenFlow
+   explicitly specifies forwarding actions.  Thus, a flow with an
+   empty set of actions does not forward packets anywhere, causing
+   them to be dropped.  You can specify an empty set of actions with
+   "actions=" on the ovs-ofctl command line.  For example:
 
        ovs-ofctl add-flow br0 priority=65535,actions=
 
@@ -1269,6 +1270,9 @@ A: An empty set of actions causes a packet to be dropped.  You can
 
        ovs-ofctl add-flow br0 priority=65535,actions=drop
 
+   "drop" is not an action, either in OpenFlow or Open vSwitch.
+   Rather, it is only a way to say that there are no actions.
+
 Q: I added a flow to send packets out the ingress port, like this:
 
        ovs-ofctl add-flow br0 in_port=2,actions=2