Virtual Private Networks (VPNs) provide secure links across remote sites over a public network. VPN protocols generally attempt to present the appearance of a seamless private network.

However, there are known issues when dealing with large packets that generally occur during large file transfers and data streams such as the ThinkRF Real-Time Spectrum Analyser

(RTSA).

This application note focuses on the Maximum Transmission Unit (MTU) and Path MTU aspects of the VPN tunnel and provides a solution to deal with large packets affected by a network with

reduced MTU.