
Tunneling Overview
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For Bay Networks routers used with a Layer 3 Dial VPN tunnel, you must specify
an adjacent host and a static route between the gateway and the CPE, and also
between the CPE router and the remote node. (The adjacent host and static routes
do not appear in this diagram.) For an illustration of Layer 3 tunneling, see
Chapter 3.
The rest of this guide describes how to install and configure a Dial VPN service
provider network. It also indicates the requirements for the remote node and the
RADIUS and DHCP servers, with references to the documentation that explains
how to do the configuration.
Dial VPN Network Components
Installing and configuring a Dial VPN service provider network involves several
tasks, some of which you may already have completed. You must:
• Plan the network.
• Install and connect the network hardware.
• Install and configure the network software.
• Verify that the elements outside the Dial VPN network, specifically the
remote server or servers, the router on the home network, and the remote
dial-in nodes, are properly configured.
• Power up, test, and troubleshoot your network.
See the documentation for each of these entities for information on how to install
and configure them.
This guide deals specifically with how you combine these elements into a Bay
Dial VPN network. The following sections summarize the elements of Dial VPN
networks.
Remote Dial-In Nodes
Remote nodes can be PCs (portable hosts) or dial-up routers, using PPP for
dial-up connections. The portable host must have PPP client software and a
TCP/IP or IPX protocol stack loaded.
Dial VPN supports dial-up IP (and, for Layer 3, IPX) over PPP for dial-in PC
clients and IP over PPP for dial-in routers connected to LANs.
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