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Chapter 3: Accessing the Internet 
                                                                                                                                                                                       
63
MER 
 
Description:  
In this deployment environment, we make up a private IP network of 192.168.1.1. 
NAT function is enabled to support multiple clients to access to Internet. 
In this example, the Wireless IAD acts as a NAT device which translates a private IP 
address into a public address. Therefore multiple users can share with one public IP 
address to access the Internet through this IAD. The public address can be a static 
public address that is pre-assigned by ISP or a dynamic public address that is 
assigned by the ISP DHCP server. 
Configuration: 
1.  Start your browser and type 192.168.1.1 in the URL box to access ADSL 
web-based manager. 
2. Go 
to Quick Start – Quick Setup. Uncheck Auto Scan Internet Connection 
(PVC). Key in the VCI and VPI value, e.g., 
VPI – 0 
VCI –
 37   
Then click the Next button. 
3. On 
the 
Configure Internet Connection – Connection Type page, select 
Bridging and then click the Next button. 
4. On 
the 
WAN IP Settings page, select Obtain an IP address automatically
then, select Obtain DNS server address automatically.  
5. Check 
Enable NAT. Then click Next
6. On 
the 
Configure LAN side Settings page, key in the IP address and subnet 
mask for your LAN. Check DHCP Server On box, and enter the start and end 
points, e.g.: 
Primary IP address:192.168.1.1 
Subnet Mask:255.255.255.0 
Start IP Address:192.168.1.2 
End IP Address: 192.168.1.254 
Then key in the leased time that you want. And click Next 
7.  Check the network information on the Summary page. Make sure the contents 
match the settings provided by your ISP. Click Finish
8.  Now the IAD is well-configured. You can access the Internet. 
 
RDAIUS
 
  Server
 
AAA
BRAS
STM-1
DSLAM
Loop
Public IP   
assigned by BRAS
 
Hub
MER
*BRAS: Broadband
Remote Access Server
Default Private IP
192.168.1.1
Wireless
IAD
ISP
 
(Internet Service Provider)
 
Ethernet
 
PC