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Unnumbered IP over ATM (IPoA)
ISP
(Internet Service Provider)
AAA
RDAIUS
Server
*BRAS: Broadband
Remote Access Server
Description:
If you apply for multiple IP addresses from your ISP, you can assign these public IP
addresses to the IAD and public server, e.g., Web or FTP server. Typically the first
IP is network address, the second is used as IAD IP address and the last one is
subnet broadcasting. Other remaining IP addresses can be assigned to PCs on the
LAN.
The following example uses the IP address ranging from 10.3.80.81 to 10.3.80.86
and the subnet mask is 255.255.255.248. In such circumstance, we do not assign
any WAN IP.
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 – 32
Click the Next button.
3.
On the Configure Internet Connection -Connection Type page, select IP
over ATM (IPoA) then click Next.
4.
On the WAN IP Settings page, select None for WAN IP address settings.
Then, select Use the following DNS Server Address and key in the
information that your ISP offered, e.g.:
Primary DNS server: 168.95.1.1
Secondary DNS server: 168.95.192.1
Uncheck Enable NAT and click Next.
5.
On the Configure LAN side Settings page, key in the information for your
LAN, 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
6.
Check Configure the second IP Address and Subnet Mask for LAN
Interface and enter the information needed, e.g.,
Secondary IP Address: 10.3.80.81
Subnet mask: 255.255.255.248
Chapter 3: Accessing the Internet
Default Private IP
192.168.1.1
STM-1
Loop
BRAS
DSLAM
IP over ATM
Public IP Pre-assigned by ISP
10.3.80.83
10.3.80.81
S/W
Hub
IAD
10.3.80.82
PC(S)
53
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