Allied Telesis AT-WR4500 6 L2TP Application Examples, Router-to-Router Secure Tunnel Example

166	AT-WR4500 Series - IEEE 802.11abgh Outdoor Wireless Routers
	RouterOS v3 Configuration and User Guide

8.5.6 L2TP Application Examples

Router-to-Router Secure Tunnel Example

		Big
		Internet
	WISP#1	WISP#2
	192.168.80.0/24	192.168.81.0/24
Home Office			Remote Office
To Internet			To Internet
192.168.80.1/24		192.168.81.1/24

LAN	LAN
10.150.2.254/24	10.150.1.254/24
	Network Setup without L2TP enabled
10.150.2.1/24	10.150.1.1/24

Figure 23: Router-to-Router Secure Tunnel Example

There are two routers in this example:

[HomeOffice]

Interface LocalHomeOffice 10.150.2.254/24

Interface ToInternet 192.168.80.1/24

[RemoteOffice]

Interface ToInternet 192.168.81.1/24 Interface LocalRemoteOffice 10.150.1.254/24

Each router is connected to a different ISP. One router can access another router through the Internet. On the L2TP server a user must be set up for the client:

[admin@HomeOffice] ppp secret> add name=ex service=l2tp password=lkjrht local-address=10.0.103.1 remote-address=10.0.103.2 [admin@HomeOffice] ppp secret> print detail

Flags: X - disabled

0name="ex" service=l2tp caller-id="" password="lkjrht" profile=default local-address=10.0.103.1 remote-address=10.0.103.2 routes==""

[admin@HomeOffice] ppp secret>

Then the user should be added in the L2TP server list:

[admin@HomeOffice] interface l2tp-server> add user=ex

[admin@HomeOffice] interface l2tp-server> print Flags: X - disabled, D - dynamic, R - running

#	NAME	USER	MTU CLIENT-ADDRESS UPTIME ENC...
0	l2tp-in1	ex

[admin@HomeOffice] interface l2tp-server>