net.onrc.openvirtex.linkdiscovery

Class SwitchDiscoveryManager

java.lang.Object

net.onrc.openvirtex.linkdiscovery.SwitchDiscoveryManager

All Implemented Interfaces:

OVXSendMsg, LLDPEventHandler, org.jboss.netty.util.TimerTask

public class SwitchDiscoveryManager
extends Object
implements LLDPEventHandler, OVXSendMsg, org.jboss.netty.util.TimerTask

Run discovery process from a physical switch. Ports are initially labeled as slow ports. When an LLDP is successfully received, label the remote port as fast. Every probeRate milliseconds, loop over all fast ports and send an LLDP, send an LLDP for a single slow port. Based on FlowVisor topology discovery implementation. TODO: add 'fast discovery' mode: drop LLDPs in destination switch but listen for flow_removed messages

Constructor Summary

Constructors

Constructor and Description
SwitchDiscoveryManager(PhysicalSwitch sw, Boolean... useBDDP) Instantiates discovery manager for the given physical switch.

Method Summary

Methods

Modifier and Type	Method and Description
void	ackProbe(PhysicalPort port) Method called by remote port to acknowledge receipt of LLDP sent by this port.
void	addPort(PhysicalPort port) Add physical port port to discovery process.
String	getName()
void	handleLLDP(OFMessage msg, Switch sw)
void	removePort(PhysicalPort port) Removes physical port from discovery process.
void	run(org.jboss.netty.util.Timeout t) Execute this method every t milliseconds.
void	sendMsg(OFMessage msg, OVXSendMsg from)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

SwitchDiscoveryManager

public SwitchDiscoveryManager(PhysicalSwitch sw,
                      Boolean... useBDDP)

Instantiates discovery manager for the given physical switch. Creates a generic LLDP packet that will be customized for the port it is sent out on. Starts the the timer for the discovery process.

Parameters:

sw - the physical switch

useBDDP - flag to also use BDDP for discovery

Method Detail

addPort

public void addPort(PhysicalPort port)

Add physical port port to discovery process. Send out initial LLDP and label it as slow port.

Parameters:

port - the port

removePort

public void removePort(PhysicalPort port)

Removes physical port from discovery process.

Parameters:

port - the port

ackProbe

public void ackProbe(PhysicalPort port)

Method called by remote port to acknowledge receipt of LLDP sent by this port. If slow port, updates label to fast. If fast port, decrements number of unacknowledged probes.

Parameters:

port - the port

sendMsg

public void sendMsg(OFMessage msg,
           OVXSendMsg from)

Specified by:

sendMsg in interface OVXSendMsg

getName

public String getName()

Specified by:

getName in interface OVXSendMsg

handleLLDP

public void handleLLDP(OFMessage msg,
              Switch sw)

Specified by:

handleLLDP in interface LLDPEventHandler

run

public void run(org.jboss.netty.util.Timeout t)

Execute this method every t milliseconds. Loops over all ports labeled as fast and sends out an LLDP. Send out an LLDP on a single slow port.

Specified by:

run in interface org.jboss.netty.util.TimerTask

Parameters:

t - timeout

Throws:

Exception