Network throughput between VMs in separate "availability zones" and separate "regions" were tested using iPerf3. See this for instructions on how to install and configure iPerf3 on Linux.
Between VMs in two Availability Zones in the same Region ([West US 2])
As the output below shows, between two DS3_v2 VMs running RHEL 7.5, a throughput of 2.6 Gbps was achieved.
Connecting to host 10.40.1.5, port 5201 [ 4] local 10.40.1.4 port 37872 connected to 10.40.1.5 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 224 MBytes 1.88 Gbits/sec 0 2.28 MBytes [ 4] 1.00-2.00 sec 311 MBytes 2.61 Gbits/sec 34 1.97 MBytes [ 4] 2.00-3.00 sec 314 MBytes 2.63 Gbits/sec 0 2.20 MBytes [ 4] 3.00-4.00 sec 311 MBytes 2.61 Gbits/sec 0 2.34 MBytes [ 4] 4.00-5.00 sec 319 MBytes 2.67 Gbits/sec 0 2.45 MBytes [ 4] 5.00-6.00 sec 320 MBytes 2.68 Gbits/sec 6 1.78 MBytes [ 4] 6.00-7.00 sec 311 MBytes 2.61 Gbits/sec 0 1.90 MBytes [ 4] 7.00-8.00 sec 316 MBytes 2.65 Gbits/sec 0 2.01 MBytes [ 4] 8.00-9.00 sec 321 MBytes 2.69 Gbits/sec 0 2.11 MBytes [ 4] 9.00-10.00 sec 320 MBytes 2.68 Gbits/sec 0 2.22 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 3.00 GBytes 2.57 Gbits/sec 40 sender [ 4] 0.00-10.00 sec 2.99 GBytes 2.57 Gbits/sec receiver iperf Done.
Between VMs in two Regions Across the continental United States ([West US 2] and [East US 2])
As the output below shows, between two DS3_v2 VMs running RHEL 7.5, a throughput of 328 Mbps was achieved.
Connecting to host 104.209.168.216, port 5201 [ 4] local 10.40.1.4 port 44654 connected to 104.209.168.216 port 5201 [ ID] Interval Transfer Bandwidth Retr Cwnd [ 4] 0.00-1.00 sec 21.6 MBytes 181 Mbits/sec 0 6.01 MBytes [ 4] 1.00-2.00 sec 40.0 MBytes 336 Mbits/sec 0 6.01 MBytes [ 4] 2.00-3.00 sec 41.2 MBytes 346 Mbits/sec 0 6.01 MBytes [ 4] 3.00-4.00 sec 41.2 MBytes 346 Mbits/sec 0 6.01 MBytes [ 4] 4.00-5.00 sec 40.0 MBytes 336 Mbits/sec 0 6.01 MBytes [ 4] 5.00-6.00 sec 43.8 MBytes 367 Mbits/sec 0 6.01 MBytes [ 4] 6.00-7.00 sec 41.2 MBytes 346 Mbits/sec 0 6.01 MBytes [ 4] 7.00-8.00 sec 41.2 MBytes 346 Mbits/sec 0 6.01 MBytes [ 4] 8.00-9.00 sec 40.0 MBytes 336 Mbits/sec 0 6.01 MBytes [ 4] 9.00-10.00 sec 41.2 MBytes 346 Mbits/sec 0 6.01 MBytes - - - - - - - - - - - - - - - - - - - - - - - - - [ ID] Interval Transfer Bandwidth Retr [ 4] 0.00-10.00 sec 392 MBytes 328 Mbits/sec 0 sender [ 4] 0.00-10.00 sec 391 MBytes 328 Mbits/sec receiver iperf Done.