I have an MT router CCR1016. Connected is a Cisco CMTS C4 for cable internet. Customers on this CMTS have between 200-400 MB of Internet download.
Unfortunately, the downloads come with a single download only about 60-80 Mbit / s. In a speed test with 20 simultaneous TCP connections, the booked speed comes on full. But not with a single connection.
The CCR is connected to the BGP router with MPLS / VPLS.
If I build another "Bandwidth Test" router to the CMTS directly, it runs.
Why can it be that I achieve the speed in the bandwidth test only with many simultaneous connections, but not with a single one?
The CPU load of the test routers is under no circumstances fully utilized. ROS of the CCR and BGP is at least 6.42.5.
Bandwidth test with TCP connection count=1 uses only one core, that's why.
Ookla's Speedtest until now provides only single connection bandwidth test, but they're updating apps to make multiple connection bandwidth test.