Chapter 3: Accessing the Internet
MER
RDAIUS
Server
AAA BRAS
STM-1
DSLAM
Loop
Public IP
assigned by BRAS
Hub
MER
*BRAS: Broadband
Remote Access Serv e
r
Default Private IP
192.168.1.1
ADSL
Router
ISP
(
Internet Servi ce Provider
)
Ethernet
PC
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 ADSL Route r acts as a NAT d evice which translates a private IP
address into a publi c add ress. Therefore multiple users ca n share with one public IP
address to acce ss the Internet through this router. The public address can be a
static publi c a ddress that is pre-assigned by ISP or a dynamic publi c 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 Intern et Connection
(PVC). Key in the VCI and VPI value, e.g.,
VPI – 0
VCI – 37
Then click the Next button.
4. On the Configure Internet Connection – Connection Type page, select
Bridging and then click the Next button.
5. On the WAN IP Settings page, select Obtain an IP address automatically;
then, select Obtain DNS server address automatically.
6. Check Enable NAT. Then click Next.
7. On the Configure LAN side Settings page, key in the IP address and subnet
mask for your LAN. Check DHCP Serv er On box, and enter the start and end
points, e.g.:
Primary IP addres s: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
8. Check the network information on the Summary page. Make sure the contents
match the settings provided by your ISP. Click Finish.
9. Now the router is well-configured. You can access the Internet.
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