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cisco881G l2tpv3

For the last week im trying to accomplish a tunnel between a dynamic 3g cellular ip and our outside company ip.

So far seen the only way to make this work is by using l2tpv3 client initiated dynamic tunneling.

so far i need an answer for some for others maybe simple questions. is l2tpv3 the good technique to make a tunnel over a cellular network? because with ipsec gre i need to provide my client and host while my client ip is dynamic in a cellular network.

So far i am trying to understand the technique but missing some key elements.

Using xconnect as a dynamic session setup i am trying to talk to my endpunt of the tunnel but where does the ip address of the endpunt go?

here is what i have worked out so far:

Router#show running-config

Building configuration...

Current configuration : 1832 bytes

!

version 12.4

no service pad

service timestamps debug datetime msec

service timestamps log datetime msec

no service password-encryption

!

hostname Router

!

boot-start-marker

boot-end-marker

!

logging message-counter syslog

!

no aaa new-model

!

!

ip source-route

!

ip cef

l2tp-class Company.Class.To.Mainsite

authentication

password 7 111A1C0605171F

!

!

no ipv6 cef

!

multilink bundle-name authenticated

chat-script internet "" "ATDT*99*1#" TIMEOUT 30 CONNECT

!

archive

log config

hidekeys

!

!

pseudowire-class Company.PW.To.Mainsite

encapsulation l2tpv3

protocol l2tpv3 Company.Class.To.Mainsite

ip local interface Loopback0

!

interface Loopback0

ip address 2.2.2.2 255.255.255.255

!

interface FastEthernet0

!

interface FastEthernet1

!

interface FastEthernet2

!

interface FastEthernet3

!

interface FastEthernet4

no ip address

shutdown

duplex auto

speed auto

!

interface Cellular0

no ip address

ip virtual-reassembly

encapsulation ppp

load-interval 60

dialer in-band

dialer pool-member 1

dialer-group 1

async mode interactive

!

interface Vlan1

no ip address

xconnect 100.200.100.200 123 encapsulation l2tpv3 pw-class Company.PW.To.Mainsite

!

interface Dialer1

ip address negotiated

ip virtual-reassembly

encapsulation ppp

dialer pool 1

dialer idle-timeout 0

dialer string internet

dialer persistent

dialer-group 1

ppp authentication chap callin

ppp chap hostname dummy

ppp chap password 0 dummy

ppp ipcp dns request

!

ip forward-protocol nd

ip route 0.0.0.0 0.0.0.0 Dialer1

no ip http server

no ip http secure-server

!

!

control-plane

!

!

line con 0

no modem enable

line aux 0

line 3

exec-timeout 0 0

password cisco

script dialer internet

login

modem InOut

no exec

transport input all

line vty 0 4

login

!

scheduler max-task-time 5000

end

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