P5 100 deeply thinks that ipsec vpn is an old model and has been used for a long time. Please upgrade it if possible.

The speed limit of this device is set by QOS. You can try the following methods:

1. After logging into the device console, fill in the correct bandwidth information in Gateway Configuration-System Settings-External Interface Configuration-Line Properties;

2. "Firewall"-"qos Level Settings" and rules in QoS upload rule settings and QoS download rule settings can be modified. If it is troublesome, you can turn them off, because p5 100 has no influence on P2P management and control, and the QoS speed limit is just average.

Later, I went to learn more. The exact reason is the performance limitation of P5 100, so the speed is limited. The performance of P5 100 is 12M, with 6M in and 6M out. If you want to make full use of the bandwidth, you can add a line route supporting 20M before P5 100, and deploy P5 100 in the rear.