Draytek Vigor2912 Series, Руководство пользователя

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Vigor2912 Series User’s Guide 106
As the router plays a role to manage and further protect its LAN, it interconnects groups of
host PCs. Each of them has a private IP address assigned by the built-in DHCP server of the
Vigor router. The router itself will also use the default
private IP address: 192.168.1.1 to
communicate with the local hosts. Meanwhile, Vigor router will communicate with other
network devices through a
public IP address. When the data flow passing through, the
Network Address Translation (NAT) function of the router will dedicate to translate
public/private addresses, and the packets will be delivered to the correct host PC in the local
area network. Thus, all the host PCs can share a common Internet connection.
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In ADSL deployment, the PPP (Point to Point)-style authentication and authorization is
required for bridging customer premises equipment (CPE). Point to Point Protocol over
Ethernet (PPPoE) connects a network of hosts via an access device to a remote access
concentrator or aggregation concentrator. This implementation provides users with significant
ease of use. Meanwhile it provides access control, billing, and type of service according to
user requirement.
When a router begins to connect to your ISP, a serial of discovery process will occur to ask for
a connection. Then a session will be created. Your user ID and password is authenticated via
PAP or CHAP with RADIUS authentication system. And your IP address, DNS server, and
other related information will usually be assigned by your ISP.
N N e e t t w w o o r r k k C C o o n n n n e e c c t t i i o o n n b b y y 3 3 G G / / 4 4 G G U U S S B B M M o o d d e e m m
For 3G/4G mobile communication through Access Point is popular more and more,
Vigor2912 adds the function of 3G/4G network connection for such purpose. By connecting
3G/4G USB Modem to the USB port of Vigor2912, it can support
HSDPA/UMTS/EDGE/GPRS/GSM and the future 3G/4G standard (HSUPA, etc).
Vigor2912n with 3G/4G USB Modem allows you to receive 3G/4G signals at any place such
as your car or certain location holding outdoor activity and share the bandwidth for using by
more people. Users can use four LAN ports on the router to access Internet. Also, they can
access Internet via 802.11n wireless function of Vigor2912n, and enjoy the powerful firewall,
bandwidth management, VPN features of Vigor2912n series.
After connecting into the router, 3G/4G USB Modem will be regarded as the third WAN port.
However, the original WAN1 and WAN2 still can be used and Load-Balance can be done in
the router. Besides, 3G/4G USB Modem in WAN3 also can be used as backup device.
Therefore, when WAN1 and WAN2 are not available, the router will use 3.5G for supporting
automatically. The supported 3G/4G USB Modem will be listed on DrayTek web site. Please
visit www.draytek.com for more detailed information.
Below shows the menu items for WAN .