TP-Link Deco BE85 BE22000 Tri-Band 10G / 2.5G Whole Home 3-Piece Mesh System - Manual (Page 68)

65 * Features available in Deco may vary by model and software version. Deco availability may also vary by region or ISP.
(9) Enter the Username and Password you have set for the L2TP/IPSec
VPN server on your router, and click Properties.
(10) Switch to the Security tab, select Layer 2 Tunneling Protocol with
IPsec (L2TP/IPSec) and click Advanced settings.