7 # Links in the physical topology, gleaned from looking at the Internet2
8 # and NLR topology maps. Link (a, b) connects sites with IDs a and b.
10 links = [(2, 12), # I2 Princeton - New York
11 (4, 5), # NLR Chicago - Houston
12 (4, 6), # NLR Chicago - Atlanta
13 (4, 7), # NLR Chicago - Seattle
14 (4, 9), # NLR Chicago - New York
15 (4, 10), # NLR Chicago - Wash DC
16 (5, 6), # NLR Houston - Atlanta
17 (5, 8), # NLR Houston - Los Angeles
18 (6, 10), # NLR Atlanta - Wash DC
19 (6, 14), # NLR Atlanta - Ga Tech
20 (7, 8), # NLR Seattle - Los Angeles
21 (9, 10), # NLR New York - Wash DC
22 (11, 13), # I2 Chicago - Wash DC
23 (11, 15), # I2 Chicago - Atlanta
24 (11, 16), # I2 Chicago - CESNET
25 (11, 17), # I2 Chicago - Kansas City
26 (12, 13), # I2 New York - Wash DC
27 (13, 15), # I2 Wash DC - Atlanta
28 (14, 15), # Ga Tech - I2 Atlanta
29 (15, 19), # I2 Atlanta - Houston
30 (17, 19), # I2 Kansas City - Houston
31 (17, 22), # I2 Kansas City - Salt Lake City
32 (17, 24), # I2 Kansas City - UMKC
33 (19, 20), # I2 Houston - Los Angeles
34 (20, 21), # I2 Los Angeles - Seattle
35 (20, 22), # I2 Los Angeles - Salt Lake City
36 (21, 22)] # I2 Seattle - Salt Lake City