PPP over Ethernet (PPPoE) IP Extension Mode RDAIUS
Server
AAA
BRAS
STM-1
DSLAM
Loop
Dynamic Public IP
assigned by BRAS
PPPoE I P
Extension Mode
Hub
ADSL
Router
Ethernet
PC(S)
PPP over Ethernet
Default Private IP
192.168.1.1
*BRAS: Broadband
Remote Access Server
ISP
(Internet Service Provider)
Description:
In this deployment environment, the PPPoE 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. The real IP that you got
is acquired from ISP. 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 i n the VCI and VPI value. Then click the Next button. eg:
VPI – 0
VCI – 39
4. On the Configure Internet Connection -Connection Type page, select the PPP over
Ethernet (PPPoE) then click the Next button.
5. In the WAN I P Se tt in gs 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.