slow lan to lan bridge

[taqchi]

hi

i create a configuration like this one https://www.softether.org/4-docs/2-howt ... Bridge_VPN

the traffic between the ends works well for ICMP and UDP packets but is extremely slow for TCP packets

can any one gime some ideas ?

regards
taq

[thisjun]

How to measure the speed?

[taqchi]

Using iperf

[J1mbo]

try iperf3 or use iperf -w 256k

Although there is a layer-2 adjacency created, it has a huge amount of latency compared to a switch, so to measure the maximum throughput we need lots more data in transit at (the TCP window).

[thisjun]

TCP over TCP is not good for high latency and high packet loss rate network.
http://sites.inka.de/bigred/devel/tcp-tcp.html