Chapter 4: Connection Mode
PPPoA + NAT Mode
* BRAS
:
Broadband Remote Access Server
Ethernet
RADIUS
Server
PPP over ATM
PPP + NAT +
DHCP on
Private LAN
PC(s)
BRAS
STM-1
DSLAM
ADSL
Router
Loop
ISP
Default Private IP
192.168.1.1
AAA
192.168.1.2
192.168.1.3
Hub
Dynamic Public IP
assigned by BRAS
Description:
In this deployment environment, the PPPoA session is between the ADSL WAN interface and BRAS. The ADSL
Router gets a public IP address from BRAS when connecting to DSLAM. The multiple client PCs will get private IP
address from the DHCP server enabled on private LAN. The enabled NAT mechanism will translate the IP
information for clients to access the Internet.
Configuration:
1.
Start up your browser and type
192.168.1.1
as the address to enter this ADSL web-based manager.
2. Go
to
Advanced User > Configuration > WAN Configuration > Create a new PVC
and select the Data
Mode –
PPPoA
. Then click
Next
button.
3.
Enter the VPI/VCI values provided by your ISP and select the encapsulation type as
LLC/SNAP
or
VC MUX
.
4.
Fill in the
User
Name
and
Password
(you should get from ISP). Check on
Enable NAT on this interface
and
click
Apply.
5. Go
to
Configuration > DNS
and enable
DNS Relay
setting and click
Next
. On the DNS Relay web page, enter
the DNS Server IP address, for example
168.95.1.1
(you should get this value from your ISP).
6.
Save the configuration by execute
System
>
Save
and
System
>
Restart
to restart your router for initiating these
settings.
63