Hi,
Let's try this :
/**
* remove all flow entries
* @param sw
*/
private void removeAllFlows(IOFSwitch sw) {
try {
OFMatch match = new OFMatch().setWildcards(OFMatch.OFPFW_ALL);
OFMessage fm = ((OFFlowMod) sw.getInputStream().getMessageFactory()
.getMessage(OFType.FLOW_MOD))
.setMatch(match)
.setCommand(OFFlowMod.OFPFC_DELETE)
.setOutPort(OFPort.OFPP_NONE)
.setLength(U16.t(OFFlowMod.MINIMUM_LENGTH));
sw.getOutputStream().write(fm);
logger.info("Remove all flow entries of Switch DPID = " +
sw.getId());
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
It works with me.
-------------------
NGUYEN Xuan Nam
Planete Team INRIA Sophia
Email : xuan-nam.ngu...@inria.fr
----- Original Message -----
> From: "Matteo Gerola" <matteo.ger...@create-net.org>
> To: openflow-discuss@lists.stanford.edu
> Sent: Tuesday, April 17, 2012 3:32:42 PM
> Subject: [openflow-discuss] Problem with flow removal
> Dear all,
> I'm trying to remove all the flows from a switch (something similar to
> the first flow_mod from the NOX controller during the initialization).
> I have a flow (udp stream) that flows in my network.
> After a while I want to change the path. My idea is to remove the flow
> from the switch so the switch will ask again to the controller, and
> the controller will send the new path. It's difficult to explain, but
> I cannot modify the flow, so I need to delete and the reinstall
> another one.
> Here is my code. As you can see I set the command to delete, and the
> wildcard to all to match all the packet in the switch.
> It matches the flow (I have only one flow in the switch), it installs
> a drop rule to that flow. So the result is not what I expected: all
> the packet that match the rule are dropped, and I'm not able to
> install the new flow∑
> Is there a way to remove the flow without adding the drop rule for the
> new packets?
> FVFlowMod flowMod=new FVFlowMod();
> OFMatch match = new OFMatch();
> match.fromString(currentFlow);
> flowMod.setCommand(OFFlowMod.OFPFC_DELETE);
> flowMod.setCookie(0);
> flowMod.setFlags((short) 0);
> match.setWildcards(OFMatch.OFPFW_ALL);
> flowMod.setMatch(match);
> flowMod.setOutPort((short) OFPort.OFPP_NONE.getValue());
> flowMod.setPriority((short) 0);
> flowMod.setHardTimeout((short)0);
> flowMod.setIdleTimeout((short)0);
> List<OFAction> actions = new LinkedList<OFAction>();
> flowMod.setActions(actions);
> flowMod.setLength(U16.t(flowMod.getLength()));
>
>
> --------------------------------------------------------
> Matteo Gerola
> CREATE-NET
> Engineering and Fast Prototyping
> Research Engineer
> Via alla Cascata 56/D - 38123 Povo Trento (Italy)
> e-mail: matteo.ger...@create-net.org
> Tel: (+39) 0461 408400 - interno/extension 1312
> Fax: (+39) 0461 421157
> Skype: matteo.gerola
> www.create-net.org
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