Network Router User Manual

Configuring L2TP Services
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303532-A Rev 00
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.
Figure 1-5. Remote Router Dialing the LNS
PC 1
PC 2
LAC
192.168.18.41
192.32.25.34
192.32.25.35
Dial-in router
LNS
192.168.19.34
L2TP IP, RIP enabled
192.32.33.94
LAN interface
RIP enabled
192.32.25.33
Dial-on-demand
RIP enabled
Dial-optimized
routing enabled
192.32.25.66
L2T0009B