Nortel Networks L2TP manual Example 2 Remote Router Calling the Corporate Network

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Configuration Examples

Example 2: Remote Router Calling the Corporate Network

Figure B-2 shows a network with two BayStack™ AN ® routers at the remote site. The AN routers are using dial-on-demand service for dial-up connections.

In this network, note the following:

•PPP is the WAN protocol for the connection between the ISP network and the corporate network.

•For the LNS configuration, you do not need to configure a static route for the remote router’s network because the LNS can learn the route using RIP.

•The IP network addresses are assigned as follows:

jsmart@bay.com: 192.32.40.1

mmark@bay.com: 192.32.40.2

PC

PC

No active call from mmark; no tunnel needed

mmark@bay.com




		No L2TP
		No L2TP	Modem
		functionality	Modem
		jsmart@bay.com

		No L2TP				TA	Multilink
		No L2TP					Multilink
		functionality		ISDN PPP

ISP network

LAC 2

TMS

LAC 1

PPP

Tunnel

Corporate

network

Router

LNS

192.32.16.55	.26.0
	.17

192.32.40.254

L2TP IP RADIUS server

interface 192.32.26.6 bay_private

Domain name in TMS database bay.com = 192.32.16.55

IP addresses in the

RADIUS server database

192.32.40.1 jsmart@bay.com 192.32.40.2 mmark@bay.com

L2T0008B

Figure B-2. L2TP Network with Routers at the Remote Site

The LNS configuration in this example is the same as in Example 1; however, you must modify the configuration of the remote AN router. Go to the next sections.

303532-A Rev 00

B-5

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Contents Configuring L2TP Services Copyright 1998 Bay Networks, Inc Bay Networks, Inc. Software License Agreement Rev Contents Chapter Starting L2TP Appendix B Configuration Examples Page Figures Page Tables Page Before You Begin PrefaceItalic text Text ConventionsAcronyms Bay Networks Technical Publications How to Get HelpTopic Chapter L2TP OverviewL2TP Benefits What Is Tunneling?L2TP Sessions Remote Host Components of an L2TP NetworkL2TP Access Concentrator LAC Remote Access Server RASTunnel Management Server TMS Radius Server L2TP Network Server LNSExamples of L2TP Networks L2TP Network Using a LACPacket Encapsulation Process L2TP Packet EncapsulationMaking a Connection Across an L2TP Network Security in an L2TP Network Bay Networks L2TP Implementation Tunnel Management Tunnel AuthenticationShows tunnel authentication Radius User Authentication L2TP IP Interface Addresses Radius AccountingRemote Router Dialing the LNS Remote Router ConfigurationIf you want to Go to Where to Go NextPage Chapter Starting L2TP Tunnel Authentication Passwords Planning Considerations for an L2TP NetworkRadius Server Information Choose Local File , Remote File , or Preparing a Configuration FileSite Manager Procedure You do this System responds Tools Choose Configuration ManagerSubnet Mask Enabling L2TP on an Unconfigured WAN InterfaceEnabling L2TP on an Existing PPP Interface Choose Edit CircuitChoose Add/Delete Configuring L2TP Services Enabling L2TP on an Existing Frame Relay Interface Configuration is completed Choose Group Protocols Site Manager ProcedureEnabling L2TP on an Existing ATM Interface You do this System respondsChoose Protocols Choose Service AttributesChapter Customizing L2TP Services Choose L2TP Configuration Modifying the L2TP Protocol ConfigurationRadius Server on Modifying Radius Server InformationChanging the LNS System Name Modifying the Number of L2TP Sessions Permitted Set the Remove Domain Name Keeping the Remote User’s Domain NameSet the Domain Name Delimiter Changing the Domain Name DelimiterChoose Tunnel Authentication Enabling Tunnel AuthenticationChoose L2TP IP Interface Modifying L2TP IP Interface AddressesDisabling L2TP Disabling RIPDeleting L2TP from a PPP Interface Customizing L2TP ServicesDeleting L2TP from a Frame Relay Interface Deleting L2TP from an ATM Interface Site Manager Procedure Topic Appendix a L2TP ParametersFigure A-1. L2TP Configuration List Window L2TP Configuration ParametersParameter Enable L2TP Parameter Max L2TP SessionsParameter Receive Window Size Parameter Retransmit Timer seconds Parameter Hello Timer secondsParameter Maximum Retransmit Parameter Ack Timeout milliseconds Parameter LNS System NameParameter Radius Primary Server IP Address Parameter Radius Primary Server Password Parameter Radius Client IP AddressParameter Tunnel Flow Control Parameter Domain Name Delimiter Parameter Remove Domain NameFigure A-2. L2TP Tunnel Security List Window L2TP Tunnel Security ParametersParameter Tunnel Authentication Password Parameter Enable Tunnel AuthenticationFigure A-3. L2TP IP Interface List Window L2TP IP Interface ParametersParameter Subnet Mask Parameter L2TP IP Interface AddressParameter RIP Enable Example 1 Remote PC Calling the Corporate Network Appendix B Configuration Examples Figure B-1. L2TP Network with PCs at the Remote Site Configuring the Remote HostsParameter Name Value IP Address 192.32.16.55 Configuring the LACs and the TMSConfiguring the LNS Domain name baynetworks.comL2TP IP Interface window, enter the L2TP IP address Data Path Through the NetworkFigure B-2. L2TP Network with Routers at the Remote Site Example 2 Remote Router Calling the Corporate NetworkConfiguring the Dial-on-Demand Circuit Configuring the PPP InterfaceParameter Name Value RFC1661 Compliance Enable Problem What to Do Appendix C TroubleshootingTable C-1 Common L2TP Network Problems and Solutions L2TP IndexIndex-2