def test_randomFailure(downed_links):
try:
net = IPNet(topo=Topo())
net.start()
# Wait for OSPF convergence
assert_connectivity(net, v6=False)
assert_connectivity(net, v6=True)
interface_down = net.randomFailure(downed_links)
# Check a failure between both hosts
assert_node_not_connected(src=net["h1"], dst=net["h2"], v6=False)
assert_node_not_connected(src=net["h1"], dst=net["h2"], v6=True)
net.restoreIntfs(interface_down)
# Check link restoration
assert_connectivity(net, v6=False)
assert_connectivity(net, v6=True)
net.stop()
finally:
cleanup()
def test_randomFailureOnTargetedLink():
try:
net = IPNet(topo=Topo())
net.start()
# Wait for OSPF convergence
assert_connectivity(net, v6=False)
assert_connectivity(net, v6=True)
itfs = net.randomFailure(1,
weak_links=[net["r1"].intf("r1-eth0").link])
# Check a failure between both hosts
assert_node_not_connected(src=net["h1"], dst=net["h2"], v6=False)
assert_node_not_connected(src=net["h1"], dst=net["h2"], v6=True)
net.restoreIntfs(itfs)
# Check link restoration
assert_connectivity(net, v6=False)
assert_connectivity(net, v6=True)
net.stop()
finally:
cleanup()