Network setup – Linksys E2100L User Manual
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Advanced Wireless-N Router
Linksys E2100L
Chapter 3: Advanced Configuration
Select Manual if you want to manually enter the largest 
packet size that is transmitted . To have the Router select 
the best MTU for your Internet connection, keep the 
default setting, Auto .
Size
When Manual is selected in the MTU field, this option
is enabled . Leave this value in the 1200 to 1500 range . The 
default size depends on the Internet Connection Type:
•
DHCP, Static IP, or Telstra: 1500
•
PPPoE: 1492
•
PPTP or L2TP: 1460
Network Setup
The Network Setup section configures the IP settings for 
your local network .
Router IP
IP Address
The Router’s IP address, as seen by your
network, is displayed . The default Router IP address is 
192.168.1.1 .
Subnet Mask
The Router’s Subnet Mask, as seen by your
network, is displayed .
Router IP
DHCP Server Settings
The settings allow you to configure the Router’s DHCP 
server function . The Router can be used as a DHCP server 
for your network . A DHCP server automatically assigns an 
IP address to each computer or device on your network . 
If you choose to enable the Router’s DHCP server option, 
make sure there is no other DHCP server on your network . 
DHCP Server Setting
DHCP Server
DHCP is enabled by factory default . If you
already have a DHCP server on your network, or you do 
not want a DHCP server, then select Disabled (no other 
DHCP features will be available) .
DHCP Reservation
Click DHCP Reservation if you want
to assign a fixed local IP address to a MAC address .
DHCP Reservation
You will see a list of DHCP clients with the following 
information: Client Name, Interface, IP Address, and 
MAC Address . 
DHCP Reservation
•
Select Clients from DHCP Table
Click the Select
check box to reserve a client’s IP address . Then click 
Add Clients .
•
Manually Adding Client
To manually assign an IP
address, enter the client’s name in the Enter  Client 
Name field . Enter the IP address you want it to have in 
the Assign IP Address field . Enter its MAC address in the 
To This MAC Address field . Then click Add .
Clients Already Reserved
A list of DHCP clients and their fixed local IP addresses 
will be displayed at the bottom of the screen . If you 
want to remove a client from this list, click Remove .
Click Save Settings to apply your changes, or click 
Cancel Changes to clear your changes . To update 
the on-screen information, click Refresh . To exit this 
screen, click Close .
Start IP Address
The Start IP Address specifies the
starting IP address for the range of addresses assigned 
by your Router when it functions as a DHCP server . (The 
first IP address assigned by the Router will be randomly 
selected within the range you specify .)
Because the Router’s default IP address is 192 .168 .1 .1, 
the Start IP Address must be 192 .168 .1 .2 or greater, but 
smaller than 192 .168 .1 .254 . The default Start IP Address is 
192.168.1.100 .
Maximum Number of Users
Enter the maximum
number of computers that you want the DHCP server to 
assign IP addresses to . This number cannot be greater 
than 253 . The default is 50 .
IP Address Range
The range of available IP addresses is
displayed .
