Linksys E2100L User Manual
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Advanced Wireless-N Router
Linksys E2100L
Chapter 3: Advanced Configuration
Automatic Configuration - DHCP
The default Internet Connection Type is set to Automatic 
Configuration - DHCP (Dynamic Host Configuration 
Protocol) . Keep the default only if your ISP supports DHCP 
or if you connect using a dynamic IP Address . (This option 
usually applies to cable connections .)
Internet Connection Type > Automatic Configuration - DHCP
Static IP
If you are required to use a permanent IP address to 
connect to the Internet, select Static IP .
Internet Connection Type > Static IP
Internet IP Address
This is the Router’s IP address, when
seen from the Internet . Your ISP will provide you with the 
IP address you need to enter here .
Subnet Mask
This is the Router’s Subnet Mask, as seen
by users on the Internet (including your ISP) . Your ISP will 
provide you with the Subnet Mask .
Default Gateway
Your ISP will provide you with the
Gateway address, which is the ISP server’s IP address .
DNS 1-3
Your ISP will provide you with at least one DNS
(Domain Name System) server IP address .
PPPoE
Some DSL-based ISPs use Point-to-Point Protocol over 
Ethernet (PPPoE) to establish Internet connections . If you 
are connected to the Internet through a DSL line, check 
with your ISP to see if they use PPPoE . If they do, you will 
have to enable PPPoE .
Internet Connection Type > PPPoE
Username and Password
Enter the Username and
Password provided by your ISP .
Service Name (optional)
If provided by your ISP, enter
the Service Name .
Connect on Demand: Max Idle Time
You can configure
the Router to cut the Internet connection after it has 
been inactive for a specified period of time (Max Idle 
Time) . If your Internet connection has been terminated 
due to inactivity, Connect on Demand enables the Router 
to automatically re-establish your connection as soon 
as you attempt to access the Internet again . To use this 
option, select Connect on Demand . In the Max Idle Time 
field, enter the number of minutes you want to elapse 
before your Internet connection terminates . The default is 
5 minutes .
Keep Alive: Redial Period
If you select this option, the
Router will periodically check your Internet connection . If 
you are disconnected, then the Router will automatically 
re-establish your connection . To use this option, select 
Keep Alive . In the Redial Period field, specify how often 
the Router should check the Internet connection . The 
default is 30 seconds .
PPTP
Point-to-Point Tunneling Protocol (PPTP) is a service that 
applies to connections in Europe only .
Internet Connection Type > PPTP
If your ISP supports DHCP or you are connecting through 
a dynamic IP address, then select Obtain an IP Address 
Automatically . If you are required to use a permanent IP 
address to connect to the Internet, then select Specify an 
IP Address . Then configure the following:
Specify an IP Address
This is the Router’s IP address, as
seen from the Internet . Your ISP will provide you with the 
IP Address you need to specify here .
Subnet Mask
This is the Router’s Subnet Mask, as seen
by users on the Internet (including your ISP) . Your ISP will 
provide you with the Subnet Mask .
Default Gateway
Your ISP will provide you with the
Gateway address, which is the ISP server’s IP address .
DNS 1-3
Your ISP will provide you with at least one DNS
(Domain Name System) Server IP address .
PPTP Server IP Address
Your ISP will provide you with
the IP address of the PPTP server .
