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303532-A Rev 00
L2TP IP Interface Addresses .................................................................................1-15
Remote Router Configuration ................................................................................1-16
Where to Go Next .........................................................................................................1-17
Chapter 2
Starting L2TP
Planning Considerations for an L2TP Network ...............................................................2-2
Tunnel Authentication Passwords .............................................................................2-2
RADIUS Server Information .....................................................................................2-2
Preparing a Configuration File ........................................................................................2-3
Enabling L2TP on an Unconfigured WAN Interface ........................................................2-4
Enabling L2TP on an Existing PPP Interface .................................................................2-5
Enabling L2TP on an Existing Frame Relay Interface ....................................................2-7
Enabling L2TP on an Existing ATM Interface .................................................................2-9
Chapter 3
Customizing L2TP Services
Modifying the L2TP Protocol Configuration ....................................................................3-2
Modifying RADIUS Server Information ...........................................................................3-3
Changing the LNS System Name ...................................................................................3-4
Modifying the Number of L2TP Sessions Permitted .......................................................3-5
Keeping the Remote User’s Domain Name ....................................................................3-6
Changing the Domain Name Delimiter ...........................................................................3-7
Enabling Tunnel Authentication ......................................................................................3-8
Modifying L2TP IP Interface Addresses .........................................................................3-9
Disabling RIP ................................................................................................................3-10
Disabling L2TP .............................................................................................................3-10
Deleting L2TP from a PPP Interface .............................................................................3-11
Deleting L2TP from a Frame Relay Interface ...............................................................3-12
Deleting L2TP from an ATM Interface ...........................................................................3-13
Appendix A
L2TP Parameters
L2TP Configuration Parameters .................................................................................... A-2
L2TP Tunnel Security Parameters ................................................................................. A-8
L2TP IP Interface Parameters ..................................................................................... A-10