src = raw_input("src: ")
dst = raw_input("dst: ")
srcNode = topo.getNode(src + "@es.net")
dstNode = topo.getNode(dst + "@es.net")
start = DateTime.now()
end = start.plusHours(2)
reserved = OSCARSReservations(topo).getReserved(start, end)
maxReservable = -1
# Calculate max bandwidth possible from source to destination
tgraph = topo.getGraph(start, end, TopologyProvider.WeightType.MaxBandwidth)
md = ModifiedDijkstra(tgraph, srcNode, dstNode)
maxBandwidth = md.getBandwidth()
# iterate through path to calculate what is the max bandwidth available and the path corresponding
for link in maxBandwidth:
print "link: ", link.getId()
port = topo.getPortByLink(link.getId())
portReservation = reserved.get(port)
if portReservation == None:
continue
remainTo = portReservation.maxReservable - portReservation.alreadyReserved[
0]
print "reservable: ", remainTo
if (maxReservable == -1) or (maxReservable > remainTo):
maxReservable = remainTo
# Created by davidhua on 7/17/14.
#
# Run by calling viewtopo.py in netshell (No arguments); viewtopo.py [path] [source] [dest]; or viewtopo.py [bandwidth] [source] [dest].
topology = TopologyFactory.instance()
topo = topology.retrieveTopologyProvider("localLayer2")
command_args = sys.argv
if len(command_args) == 2:
graph = topo.getGraph(TopologyProvider.WeightType.TrafficEngineering)
viewer = GraphViewer(graph)
viewer.init()
elif len(command_args) == 5:
srcNode = topo.getNode(command_args[3]+"@es.net");
dstNode = topo.getNode(command_args[4]+"@es.net");
if command_args[2] == "path":
graph = topo.getGraph(TopologyProvider.WeightType.TrafficEngineering)
path = DijkstraShortestPath(graph, srcNode, dstNode)
thispath = path.getPath()
viewer = GraphViewer(thispath, graph)
elif command_args[2] == "bandwidth":
graph = topo.getGraph(TopologyProvider.WeightType.MaxBandwidth)
md = ModifiedDijkstra(graph, srcNode, dstNode)
maxBandwidth = md.getPath()
viewer = GraphViewer(maxBandwidth, graph)
viewer.init()
else:
sys.exit()
src = raw_input("src: ")
dst = raw_input("dst: ")
srcNode = topo.getNode(src+"@es.net");
dstNode = topo.getNode(dst+"@es.net");
start = DateTime.now()
end = start.plusHours(2)
reserved = OSCARSReservations(topo).getReserved(start,end)
maxReservable = -1
# Calculate max bandwidth possible from source to destination
tgraph = topo.getGraph(start, end, TopologyProvider.WeightType.MaxBandwidth)
md = ModifiedDijkstra(tgraph, srcNode, dstNode)
maxBandwidth = md.getBandwidth()
# iterate through path to calculate what is the max bandwidth available and the path corresponding
for link in maxBandwidth:
print "link: " , link.getId()
port = topo.getPortByLink(link.getId())
portReservation = reserved.get(port)
if portReservation == None:
continue
remainTo = portReservation.maxReservable - portReservation.alreadyReserved[0]
print "reservable: ", remainTo
if (maxReservable == -1) or (maxReservable > remainTo):
maxReservable = remainTo;
print "Max. reservable= " + str(maxReservable) + " bits/sec"
