def _make_graph_preferred():
# Test AS3 routes correctly to AS3; multiple routes of different preferences.
# 2----3-\
# | | |
# \ 1--5 |
# -4 | |
# 6--/-/
graph = ASGraph()
graph.add_peering(1, 4, Relationship.P2C)
graph.add_peering(1, 5, Relationship.P2P)
graph.add_peering(2, 3, Relationship.P2P)
graph.add_peering(2, 4, Relationship.P2C)
graph.add_peering(3, 6, Relationship.P2C)
graph.add_peering(4, 6, Relationship.P2C)
graph.add_peering(5, 6, Relationship.P2C)
return graph
def make_three_way_diamond(relationship_combination):
graph = ASGraph()
graph.add_peering(1, 2, relationship_combination[0])
graph.add_peering(1, 3, relationship_combination[1])
graph.add_peering(1, 4, relationship_combination[2])
graph.add_peering(2, 5, relationship_combination[3])
graph.add_peering(3, 5, relationship_combination[4])
graph.add_peering(4, 5, relationship_combination[5])
return graph
def _make_graph_implicit_withdrawal_multihop():
# Test implicit withdrawal and distant propagation.
# AS11 will route towards AS10 through AS2 and discard route through AS1.
# 1---11
# | | \
# | 2 3
# | / | \
# 10 12 4
graph = ASGraph()
graph.add_peering(1, 11, Relationship.P2P)
graph.add_peering(10, 1, Relationship.C2P)
graph.add_peering(10, 2, Relationship.C2P)
graph.add_peering(2, 11, Relationship.C2P)
graph.add_peering(4, 3, Relationship.C2P)
graph.add_peering(3, 11, Relationship.C2P)
graph.add_peering(12, 2, Relationship.C2P)
return graph
def _make_graph_multiple_choices():
# Test ASes learn and correctly propagate multiple routes:
# 1---\---\
# | | |
# 2 3 4===6 # 2, 3, 4 peer with 6
# | | | |
# 5---/---/ 7
# |
# |---\---\
# 8 9 10===12 # 8, 9, 10 peer with 12
# | | | |
# 11--/---/ 13
graph = ASGraph()
graph.add_peering(1, 2, Relationship.P2C)
graph.add_peering(1, 3, Relationship.P2C)
graph.add_peering(1, 4, Relationship.P2C)
graph.add_peering(2, 5, Relationship.P2C)
graph.add_peering(3, 5, Relationship.P2C)
graph.add_peering(4, 5, Relationship.P2C)
graph.add_peering(2, 6, Relationship.P2P)
graph.add_peering(3, 6, Relationship.P2P)
graph.add_peering(4, 6, Relationship.P2P)
graph.add_peering(6, 7, Relationship.P2C)
graph.add_peering(5, 8, Relationship.P2C)
graph.add_peering(5, 9, Relationship.P2C)
graph.add_peering(5, 10, Relationship.P2C)
graph.add_peering(8, 11, Relationship.P2C)
graph.add_peering(9, 11, Relationship.P2C)
graph.add_peering(10, 11, Relationship.P2C)
graph.add_peering(8, 12, Relationship.P2P)
graph.add_peering(9, 12, Relationship.P2P)
graph.add_peering(10, 12, Relationship.P2P)
graph.add_peering(12, 13, Relationship.P2C)
return graph
def _make_graph_implicit_withdrawal():
# Make AS graph that requires a BGP implicit withdrawal prior to convergence.
# AS2 is a peer of AS3, but is not a client of AS1.
# AS8 should learn 8 3 1 10 then change to 8 6 4 1 10 when
# AS3 finally learns the route through AS2.
# 1--------\---\
# | 2---3 4
# | 5 | 6
# | 7 8---/
# | 9
# 10---/
graph = ASGraph()
graph.add_peering(1, 3, Relationship(-1))
graph.add_peering(1, 4, Relationship(-1))
graph.add_peering(1, 10, Relationship(-1))
graph.add_peering(2, 3, Relationship(0))
graph.add_peering(2, 5, Relationship(-1))
graph.add_peering(3, 8, Relationship(-1))
graph.add_peering(4, 6, Relationship(-1))
graph.add_peering(5, 7, Relationship(-1))
graph.add_peering(6, 8, Relationship(-1))
graph.add_peering(7, 9, Relationship(-1))
graph.add_peering(9, 10, Relationship(-1))
return graph
def _make_graph_peer_lock():
# Test propagation of hijacked routes through when using peer lock:
# ASes 2 and 3 peer with AS1, ASes 4 and 5 are providers of AS1.
# ASes 2 and 4 have peer lock configured with AS1. ASes 6 and 7 are
# customers of ASes 2-5. AS7 will hijack the prefix. AS 8 peers with
# ASes 2-5 and AS9 is a provider of ASes 2-5.
# ----9----
# / / \ \
# | 4 5 | --\
# | | \ / | | --\
# 2--+--1--+--3----8
# | | | | --/
# \-6 7-/
graph = ASGraph()
graph.add_peering(1, 2, Relationship.P2P)
graph.add_peering(1, 3, Relationship.P2P)
graph.add_peering(1, 4, Relationship.C2P)
graph.add_peering(1, 5, Relationship.C2P)
graph.add_peering(6, 2, Relationship.C2P)
graph.add_peering(6, 3, Relationship.C2P)
graph.add_peering(6, 4, Relationship.C2P)
graph.add_peering(6, 5, Relationship.C2P)
graph.add_peering(7, 2, Relationship.C2P)
graph.add_peering(7, 3, Relationship.C2P)
graph.add_peering(7, 4, Relationship.C2P)
graph.add_peering(7, 5, Relationship.C2P)
graph.add_peering(8, 2, Relationship.P2P)
graph.add_peering(8, 3, Relationship.P2P)
graph.add_peering(8, 4, Relationship.P2P)
graph.add_peering(8, 5, Relationship.P2P)
graph.add_peering(9, 2, Relationship.P2C)
graph.add_peering(9, 3, Relationship.P2C)
graph.add_peering(9, 4, Relationship.P2C)
graph.add_peering(9, 5, Relationship.P2C)
graph.set_import_filter(2, _check_origin, 1)
graph.set_import_filter(4, _check_origin, 1)
return graph
def _make_graph_peer_peer_relationships():
# Test route propagation through sequence of P2P links:
# AS9 is a provider of 1 and 5. AS10 is a provider of 3 and 7.
# 9-------\ 10
# | /--+--/|
# 1---3---5---7
# 2 4 6 8
graph = ASGraph()
graph.add_peering(1, 2, Relationship.P2C)
graph.add_peering(3, 4, Relationship.P2C)
graph.add_peering(5, 6, Relationship.P2C)
graph.add_peering(7, 8, Relationship.P2C)
graph.add_peering(9, 1, Relationship.P2C)
graph.add_peering(9, 5, Relationship.P2C)
graph.add_peering(10, 3, Relationship.P2C)
graph.add_peering(10, 7, Relationship.P2C)
graph.add_peering(1, 3, Relationship.P2P)
graph.add_peering(3, 5, Relationship.P2P)
graph.add_peering(5, 7, Relationship.P2P)
return graph