This document is an abstract of the VRP3.3 Operation Manual (VPN). It introduces the overview, basic technology, classification of VPN, as well as the configuration of L2TP protocol and GRE protocol.
The document provides an overview of VPN technology, describing its characteristics, advantages, and network structures. It introduces basic VPN concepts, classification, and the underlying tunneling protocols.
Detailed configuration chapters cover L2TP, GRE, and dynamic VPN (DVPN) setups, including step‑by‑step command examples, interface creation, authentication, and troubleshooting guidance for each protocol. This manual is written in Chinese.