Traceroute commands can be run to verify the path to reach a specific IP address.
Path MTU Discovery command can be run to determine the maximum transmission unit (MTU) size on the network path between two Internet Protocol (IP) hosts, usually with the goal of avoiding IP fragmentation.
Iperf is a commonly used network testing tool that can create UDP data streams and measure the throughput of a network that is carrying them. The tool can be used by specifying the destination IP address (Iperf server) and the Rate in kbps transmitted during the test. Please note that the Iperf tool is CPU intensive. Therefore, the result might not be accurate especially when testing with high rates.