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Chapter 3: Accessing the Internet
65
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 ADSL Router 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 router. 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 router is well-configured. You can access the Internet.
RDAIUS
Server
AAA
BRAS
STM-1
DSLAM
Loop
Public IP
assigned by BRAS
Router
ME
R
*BRAS: Broadband
Remote Access Serve
r
Default Private IP
192.168.1.1
ADSL
ISP
(
Internet Service Provider
)
Hub
Ethernet
PC