Tut Systems XL-12000S - Manual (Page 28)

XL-12000S
MANAGED, HIGH-SPEED NETWORK MODEM USER GUIDE
20 TUT SYSTEMS 7.0 CONFIGURE THE MODEM
2. IP Routing Only
This selection will route IP traffic between different networks. In
“IP Routing Only” mode, the modem passes only IP packets between
networks attached to the LAN and DSL sides of the modem, and
networks designated in the modems static routing tables. This
option will block all non-IP traffic. “Appendix D” provides subnet
mask information.
You must also modify or configure the routing table of your external
gateway router to include the network changes made when the
modems are incorporated as routers. Operators are urged to consult
their router vendor’s documentation to configure the routing table for
their external gateway router.
Routing Example One (Using a Router and Bridge Combination):
This example shows how to use one XL-12000S as a router and
another as a bridge. Using this configuration saves IP addresses but
increases traffic (i.e. broadcast packets from the bridged LAN) on
the DSL line.
Figure 7.4 Routing Example One (Using a Router and Bridge Combination)
Building 1
Ethernet Hub
192.168.3.1
(DSL)
192.168.2.2 (LAN)
192.168.3.2 (LAN)
192.168.3.3
Modem 1
T UT S YSTEMS
Building 2
Modem 2
T UT S YSTEMS
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