Confidential and Proprietary Information of ZTE CORPORATION 265
Chapter 18
GRE Configuration
Overview
The chapter introduces several common VPN technologies and
also describes the General Route Encapsulation (GRE)
technology and its detailed configuration on ZXR10 GER
This chapter covers following topics.
TABLE 313 TOPICS IN CHAPTER 18
Topic Page No
Introduction 265
GRE Overview 267
Configuring GRE
268
GRE Maintenance and Diagnosis 270
GRE Configuration Example 270
Introduction
VPN stands for Virtual Private Network, which is relative to
actual private networks. An actual private network (such as a
banking network, a governmental network or a large enterprise
network) implements interconnection via leased lines, while a
VPN is a private to transmit private data over the common
Internet.
A virtual private network is not a real private network, but can
implement the functions of a private network. VPN depends
upon ISP (Internet Service Provider) and NSP (Network Service
Provider) to set up a dedicated data communications network on
a public network. The description of IP-based VPNs in the IETF
Draft is as follows: "The use of the IP mechanism to simulate a
Introduction
Contents
VPN
Implementation
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