3 # Links in the physical topology, gleaned from looking at the Internet2
4 # topology map. Link (a, b) connects sites with IDs a and b.
6 PhysicalLinks = [(2, 12), # I2 Princeton - New York
7 (11, 13), # I2 Chicago - Wash DC
8 (11, 15), # I2 Chicago - Atlanta
9 (11, 16), # I2 Chicago - CESNET
10 (11, 17), # I2 Chicago - Kansas City
11 (12, 13), # I2 New York - Wash DC
12 (13, 15), # I2 Wash DC - Atlanta
13 (14, 15), # Ga Tech - I2 Atlanta
14 (15, 19), # I2 Atlanta - Houston
15 (17, 19), # I2 Kansas City - Houston
16 (17, 22), # I2 Kansas City - Salt Lake City
17 (17, 24), # I2 Kansas City - UMKC
18 (19, 20), # I2 Houston - Los Angeles
19 (20, 21), # I2 Los Angeles - Seattle
20 (20, 22), # I2 Los Angeles - Salt Lake City
21 (21, 22)] # I2 Seattle - Salt Lake City