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Nortel Networks L2TP manual Remote Router Configuration, Remote Router Dialing the LNS

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Configuring L2TP Services

Remote Router Configuration

If the host at the remote site is a Bay Networks router, you may need to configure a dial-on-demand circuit for the remote router’s dial-up interface to the LAC at the ISP network.

Enable RIP on both the dial-on-demand circuit and the attached LAN interface of the remote router, so that the LNS can learn routing information from the remote router. To avoid unnecessarily activating the circuit because of RIP packets, enable dial-optimized routing for the dial-on-demand circuit (see Figure 1-5).

In addition, configure a default or static route for the remote router, which uses the next-hop address that corresponds to the L2TP IP interface address of the LNS. This default or static route enables the remote router to deliver L2TP packets to the LNS.

PC 1

192.32.25.34 PC 2

192.32.25.35

Dial-in router

LAN interface	Dial-on-demand
RIP enabled	RIP enabled

192.32.25.33Dial-optimized routing enabled 192.32.25.66

LAC

192.168.18.41LNS 192.168.19.34

L2TP IP, RIP enabled 192.32.33.94

L2T0009B

Figure 1-5. Remote Router Dialing the LNS

1-16	303532-A Rev 00

Image 32

Nortel Networks L2TP manual Remote Router Configuration, Remote Router Dialing the LNS

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 Preface Before You BeginText Conventions Italic textAcronyms How to Get Help Bay Networks Technical PublicationsChapter L2TP Overview TopicWhat Is Tunneling? L2TP BenefitsL2TP Sessions Components of an L2TP Network Remote HostTunnel Management Server TMS L2TP Access Concentrator LACRemote Access Server RAS L2TP Network Server LNS Radius ServerL2TP Network Using a LAC Examples of L2TP NetworksL2TP Packet Encapsulation Packet Encapsulation ProcessMaking a Connection Across an L2TP Network Security in an L2TP Network Bay Networks L2TP Implementation Tunnel Authentication Tunnel ManagementShows tunnel authentication Radius User Authentication Radius Accounting L2TP IP Interface AddressesRemote Router Configuration Remote Router Dialing the LNSWhere to Go Next If you want to Go toPage Chapter Starting L2TP Radius Server Information Tunnel Authentication PasswordsPlanning Considerations for an L2TP Network Preparing a Configuration File Site Manager Procedure You do this System respondsTools Choose Configuration Manager Choose Local File , Remote File , orEnabling L2TP on an Unconfigured WAN Interface Subnet MaskChoose Add/Delete Enabling L2TP on an Existing PPP InterfaceChoose Edit Circuit Configuring L2TP Services Enabling L2TP on an Existing Frame Relay Interface Configuration is completed Site Manager Procedure Enabling L2TP on an Existing ATM InterfaceYou do this System responds Choose Group ProtocolsChoose Service Attributes Choose ProtocolsChapter Customizing L2TP Services Modifying the L2TP Protocol Configuration Choose L2TP ConfigurationModifying Radius Server Information Radius Server onChanging the LNS System Name Modifying the Number of L2TP Sessions Permitted Keeping the Remote User’s Domain Name Set the Remove Domain NameChanging the Domain Name Delimiter Set the Domain Name DelimiterEnabling Tunnel Authentication Choose Tunnel AuthenticationModifying L2TP IP Interface Addresses Choose L2TP IP InterfaceDisabling RIP Disabling L2TPCustomizing L2TP Services Deleting L2TP from a PPP InterfaceDeleting L2TP from a Frame Relay Interface Deleting L2TP from an ATM Interface Site Manager Procedure Appendix a L2TP Parameters TopicL2TP Configuration Parameters Figure A-1. L2TP Configuration List WindowParameter Receive Window Size Parameter Enable L2TPParameter Max L2TP Sessions Parameter Maximum Retransmit Parameter Retransmit Timer secondsParameter Hello Timer seconds Parameter Radius Primary Server IP Address Parameter Ack Timeout millisecondsParameter LNS System Name Parameter Tunnel Flow Control Parameter Radius Primary Server PasswordParameter Radius Client IP Address Parameter Remove Domain Name Parameter Domain Name DelimiterL2TP Tunnel Security Parameters Figure A-2. L2TP Tunnel Security List WindowParameter Enable Tunnel Authentication Parameter Tunnel Authentication PasswordL2TP IP Interface Parameters Figure A-3. L2TP IP Interface List WindowParameter L2TP IP Interface Address Parameter Subnet MaskParameter RIP Enable Appendix B Configuration Examples Example 1 Remote PC Calling the Corporate NetworkConfiguring the Remote Hosts Figure B-1. L2TP Network with PCs at the Remote SiteConfiguring the LACs and the TMS Configuring the LNSDomain name baynetworks.com Parameter Name Value IP Address 192.32.16.55Data Path Through the Network L2TP IP Interface window, enter the L2TP IP addressExample 2 Remote Router Calling the Corporate Network Figure B-2. L2TP Network with Routers at the Remote SiteParameter Name Value RFC1661 Compliance Enable Configuring the Dial-on-Demand CircuitConfiguring the PPP Interface Appendix C Troubleshooting Problem What to DoTable C-1 Common L2TP Network Problems and Solutions Index L2TPIndex-2