def testPrefixWithdrawal(self):
"""Testing that prefix are unreachable by all routers after prefix withdrawal"""
#Same as above. Withdraw prefix after some time, and check that no one has a path
for mode in self.bgp_modes:
SimBGP.init()
#SimBGP.readConfigFile("../../config/plain_bgp_base_topo.cfg")
SimBGP.readConfigFile("plain_bgp_base_topo.cfg")
SimBGP.BGPModeAllRouters(mode)
SimBGP.computeIGP()
SimBGP.run()
for router in SimBGP._router_list:
self.assertNotEqual(
len(SimBGP._router_list[router].loc_rib["2.0/8"]), 0)
SimBGP._event_Scheduler.add(
SimBGP.CEvent(SimBGP._systime, ["2.1", "2.0/8"],
SimBGP.EVENT_WITHDRAW_PREFIX))
SimBGP.run()
for router in SimBGP._router_list:
try:
self.assertEqual(
len(SimBGP._router_list[router].loc_rib["2.0/8"]), 0)
except:
print("Assertion failed with router", router, "in mode",
mode)
raise
def testLinkDown(self):
#SimBGP.runConfigFile("../../config/igp_config.cfg")
SimBGP.runConfigFile("igp_config.cfg")
SimBGP._event_Scheduler.add(
SimBGP.CEvent(SimBGP.toSystemTime(100.0), ["3", "2"],
SimBGP.EVENT_LINK_DOWN))
SimBGP.run()
self.assertEqual(SimBGP._igp_graph.getShortestPathLength("3", "2"),
2000)
def testPrefixWithdrawal(self):
"""Testing that prefix are unreachable by all routers after prefix withdrawal"""
#Same as above. Withdraw prefix after some time, and check that no one has a path
#SimBGP.runConfigFile("../../config/plain_bgp_base_topo.cfg")
SimBGP.runConfigFile("plain_bgp_base_topo.cfg")
SimBGP._event_Scheduler.add(
SimBGP.CEvent(SimBGP._systime, ["2.1", "2.0/8"],
SimBGP.EVENT_WITHDRAW_PREFIX))
SimBGP.run()
for router in SimBGP._router_list:
self.assertEqual(len(SimBGP._router_list[router].loc_rib["2.0/8"]),
0)
def testLinkDown(self):
"""Checking behaviour when an IGP link is down"""
for mode in self.bgp_modes:
SimBGP.init()
#SimBGP.readConfigFile("../../config/plain_hot_potato.cfg")
SimBGP.readConfigFile("plain_hot_potato.cfg")
SimBGP.BGPModeAllRouters(mode)
SimBGP.computeIGP()
SimBGP.run()
self.assertEqual(
SimBGP.getRouterLink("0.0.0.1", "0.0.0.2").reach,
SimBGP.PEER_REACH)
#Check that each router prefers path via itself
self.assertEqual(
SimBGP._router_list["0.0.0.2"].loc_rib["1.0/8"][0].src_pid,
"0.0.0.0")
self.assertEqual(
SimBGP._router_list["0.0.0.1"].loc_rib["1.0/8"][0].src_pid,
"0.0.0.0")
#Check that each receiving router prefers eBGP path
self.assertEqual(
SimBGP._router_list["0.0.0.3"].loc_rib["1.0/8"][0].src_pid,
"1.0.0.0")
self.assertEqual(
SimBGP._router_list["0.0.0.0"].loc_rib["1.0/8"][0].src_pid,
"2.0.0.0")
#Link down
SimBGP._event_Scheduler.add(
SimBGP.CEvent(SimBGP.toSystemTime(10.0),
["0.0.0.1", "0.0.0.2"], SimBGP.EVENT_LINK_DOWN))
SimBGP.run()
self.assertEqual(
SimBGP.getRouterLink("0.0.0.1", "0.0.0.2").reach,
SimBGP.PEER_UNREACH)
self.assertEqual(
SimBGP._router_list["0.0.0.2"].loc_rib["1.0/8"][0].src_pid,
"0.0.0.3")
self.assertEqual(
SimBGP._router_list["0.0.0.1"].loc_rib["1.0/8"][0].src_pid,
"0.0.0.0")
#Check that each receiving router prefers eBGP path
self.assertEqual(
SimBGP._router_list["0.0.0.3"].loc_rib["1.0/8"][0].src_pid,
"1.0.0.0")
self.assertEqual(
SimBGP._router_list["0.0.0.0"].loc_rib["1.0/8"][0].src_pid,
"2.0.0.0")
#Check Link Up
SimBGP._event_Scheduler.add(
SimBGP.CEvent(SimBGP.toSystemTime(11.0),
["0.0.0.1", "0.0.0.2"], SimBGP.EVENT_LINK_UP))
SimBGP.run()
self.assertTrue(
SimBGP._igp_graph.isReachableFrom("0.0.0.1", "0.0.0.2"))
self.assertEqual(
SimBGP.getRouterLink("0.0.0.1", "0.0.0.2").reach,
SimBGP.PEER_REACH)
self.assertEqual(
SimBGP._router_list["0.0.0.2"].loc_rib["1.0/8"][0].src_pid,
"0.0.0.0")
self.assertEqual(
SimBGP._router_list["0.0.0.1"].loc_rib["1.0/8"][0].src_pid,
"0.0.0.0")