PPP over ATM (PPPoA) IP Extension Mode
RDAIUS
Server
AAA
BRAS
STM-1
DSLAM
Loop
PPPoA+NAT+DHCP
on Private LAN
Hub
ADSL
Router
Ethernet
PC
PPP over ATM
Default Private IP
192.168.1.1
ISP
(Internet Service Provider)
*BRAS: Broadband
Remote Access Server
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 acts as a bridge and gets a public IP address from BRAS for your computer. And
only the one that got the public IP address is allowed to access into Internet. Moreover, no NAT
translation will be done at this case.
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 - Internet - Connections
. And click
Add
.
3.
Type in the
VCI
and
VPI
value. Then click the
Next
button. eg:
VPI – 0
VCI – 38
4.
On the
Configure Internet Connection -Connection Type
page, select the
PPP over ATM
(PPPoA)
then click the
Next
button.
5.
In the
WAN IP Settings
page, select
Obtain an IP address automatically
, uncheck
Enable
NAT
box and check
PPP IP extension
then click
Next
.
6.
In the
PPP Username and Password
page, enter the PPP username and password that you got
from your ISP. Select
Dial on Demand
and type in the number for inactivity timeout. The
default is 20. Or select
Always on
. Then click
Next
.
7.
In the
Configure LAN side Settings
page, type in the IP address and subnet mask for your
LAN. And click
Next
.
eg:
Primary IP address:192.168.1.1
Subnet Mask:255.255.255.0
8.
Check the network information. Make sure the settings match the settings provided by ISP.
Click
Finish
.
