SMC Networks BARRICADETM N SMCWBR11S-3GN - Manual (Page 26)

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N
ETWORK
P
LANNING
The Mini 3G Broadband Router is designed to be very flexible in its
deployment options. It can be used as an Internet gateway for a small
network, or as an access point to extend an existing wired network to
support wireless users. It also supports use as a wireless bridge to connect
up to four wired LANs.
This chapter explains some of the basic features of the Mini 3G Broadband
Router and shows some network topology examples in which the device is
implemented.
I
NTERNET
G
ATEWAY
R
OUTER
The Mini 3G Broadband Router can connect directly to a cable or DSL
modem to provide an Internet connection for multiple users through a
single service provider account. Users connect to the Mini 3G Broadband
Router either through a wired connection to a LAN port, or though the
device’s own wireless network. The Mini 3G Broadband Router functions as
an Internet gateway when set to Router Mode.
An Internet gateway employs several functions that essentially create two
separate Internet Protocol (IP) subnetworks; a private internal network
with wired and wireless users, and a public external network that connects
to the Internet. Network traffic is forwarded, or routed, between the two
subnetworks.
Figure 5: Operating as an Internet Gateway Router
Mini Router
Server
(IP: 192.168.2.x)
Desktop PC
(IP: 192.168.2.x)
Cable/DSL
Modem
Internet
Service
Provider
Notebook PC
(IP: 192.168.2.x)
WAN
(IP assigned
from
ISP)
LAN (IP: 192.168.2.x)
LAN Switch
3G Internet
Service
Provider
3G Modem