Technical Tip: The user laptop with docking station failed Dialup VPN connection to remote FortiGate

[DuyNguy]

Description	This article provides a resolution to a use case, where a user laptop with a docking station failed Dialup VPN to remote FortiGate.
Scope	FortiSwitch in FortiLink mode.
Solution	Issue: The user laptop with a docking station connected to a managed FortiSwitch failed to establish a Dialup VPN connection to another FortiGate at a remote site. Topology: UserLaptop---DockStation---FSW---LocalFortiGate---RemoteFortiGate---RemoteSite Root Cause Analysis: The user's Laptop not seeing all the reply packets while on LAN, therefore IKE retransmits and session times out eventually. The docking station NIC dropped reply packets. Resolution: Connect the ethernet cable directly to the Laptop NIC and Dialup VPN established.