Hello. I deployed an application in eze, and found that traffic within the country is routed through gru edge, despite eze being nearer. I connected through a VPN that exits near eze, and found that response times were better (37ms with VPN vs 45ms without VPN) and traffic was effectively edged at the datacenter. At the same time, native IPv6 seems to be routed through scl, but IPv6 proxied by CF is routed through gru.
Test from IPv4-only client (190.3.51.0 / AS19037, Santa Fe):
debug.fly.dev → Fly-Region: gru
> tracert -w 200 -d debug.fly.dev
1 <1 ms <1 ms <1 ms 192.168.2.1
2 1 ms <1 ms <1 ms 192.168.100.1
3 3 ms 4 ms 3 ms 100.124.66.2
4 4 ms * * 10.0.3.200
5 15 ms 14 ms 15 ms 170.51.254.176
6 14 ms 13 ms 15 ms 195.22.220.46
7 41 ms 38 ms 39 ms 195.22.219.23
8 * * * Tiempo de espera agotado para esta solicitud.
9 * * * Tiempo de espera agotado para esta solicitud.
10 42 ms 42 ms 44 ms 148.163.219.66
11 37 ms 37 ms 36 ms 37.16.21.10
Test from dual-stack client (same ISP):
debug.fly.dev → Fly-Region: scl
> tracert -w 200 debug.fly.dev
1 4 ms 2 ms 2 ms 2800:190:4004:2001:6d47:fd6b:78cd:3d99
2 5 ms 4 ms 5 ms 2800:190:4004:2001::2
3 * 17 ms * 2800:190:ffff:ffff:1::2c
4 77 ms 50 ms 10 ms 2800:a90:10:6::51
5 38 ms 41 ms 38 ms 2800:670:10:6::1
6 32 ms 33 ms * 2801:14:9000::3:6236:1
7 33 ms 33 ms 44 ms 2607:f740:56::3
8 38 ms 37 ms 37 ms 2a09:8280:1:763f:8bdd:34d1:c624:78cd
Test with VPN (exit at Buenos Aires / AS7303)
debug.fly.dev → Fly-Region: eze
> tracert -w 200 debug.fly.dev
1 25 ms 23 ms 25 ms (VPN gateway)
2 24 ms 23 ms 28 ms 172.30.101.3
8 36 ms 38 ms 42 ms 200.25.50.80
9 44 ms 38 ms 35 ms 200.25.51.69
10 79 ms 94 ms 47 ms 200.25.63.135
11 38 ms 44 ms * 66.241.124.229
12 38 ms 42 ms 39 ms 66.241.124.229
Internet exchange points for context 
