name: VPN
full_form: Virtual Private Network
context: several APNs for the testing, and every APN is configured to associate with specific VPN (e.g. the VPN can be GRE) for user plane traffic. For example, APN1âs traffic is sent and received by VPN1, and APN2âs traffic is sent and received by VPN2. The PGW for which the test applies and that fail to meet this precondition fail the test by definition. Execution Steps Execute the following steps: 1. The tester intercepts the VPN packets between the P-GW and PDN, as well as the GTP-U packets between P-GW and S-GW/UE; 2. The tester checks triggers APN1âs traffic with the P-GW, then the tester verifies that the tunnel id of the VPN packets sent by the P-GW indicates VPN1 as well as the TEID of the GTP-U packets sent by the P-GW indicates APN1; 3. The tester triggers APN2âs traffic with the P-GW, then the tester verifies that the tunnel id of the VPN packets sent by the P-GW indicates VPN2 as well as the TEID of the GTP-U packets sent by the P-GW indicates APN2;; 4. The tester checks triggers
description: A Virtual Private Network (VPN) uses an internet connection to link remote sites or users, creating a secure and private network connection as if they were directly connected. In 3GPP TS 33.250, VPNs are used for user plane traffic differentiation, assigning each Access Point Name (APN) to a specific VPN.
explanation: VPN is classified as a Network because it establishes a virtual, interconnected space between remote entities over the internet, facilitating secure communication and data transfer. Its role in differentiating user traffic based on APNs further reinforces its classification within the network domain.
section_title: 4.3.5.2	User Plane Traffic Differentiation
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