DSL-2540T ADSL Router User Guide
22
Connection Type
This specifies the protocol (PPPoE or PPPoA) and the encapsulation
method (LLC or VC-Mux) used for your connection. The options available
are
PPPoE LLC, PPPoA LLC or PPPoA VC-Mux.
MTU
The Maximum Transmission Unit size may be changed if you want to
optimize efficiency for uploading data through the WAN interface. The
default setting (
1400 bytes) should be suitable for most users. Some
user may want to adjust the setting to optimize performance for wireless
traffic or when low latency is desired (such as with Internet gaming). It
is highly recommended that the user research how adjusting the MTU
may effect network traffic for better or worse.
MRU
Similar to the MTU, except this applies to Maximum Received Unit size
for downloading data. Most users will be happy with the default setting
(
1492 bytes). However this may also be optimized for fast downloads of
general bulk Internet traffic, for low latency or for downloading to
computers on the Wireless LAN. As with the MTU setting, the user
should carefully consider how changing the MRU may affect Internet
downloads for all systems on your LAN.
Default Route
When this is enabled, the Router will be considered to be the primary
gateway to the Internet and WAN for systems on your network. If you
are using the Router on a network with one or more alternative gateway
routers, you may prefer to disable this if you will use another router as
the primary gateway.
PPPoE PassThrough
This feature enables the Router to allow a “dial-up” or separate bridged
PPP connection to an individual PC. In this instance the Router will serve
as a bridge.
NAT
Network Address Translation may be enabled or disabled with the pull-
down menu. Keep in mind that disabling NAT allows only a single
computer to be used for Internet access through the Router. NAT is
enabled and disabled for the Router on all connections (i.e. Pvc0 – Pvc7)
if your Router is set up for multiple virtual connections.
Firewall
Use this to universally enable or disable the Firewall and Filter features
available in the Router. If you disable this you will not be able to
configure settings in the Firewall Configuration window or Filters
window in the Advanced directory.
IP Control
This is used to determine how global IP settings are handled for the
WAN interface. Typically PPPoE or PPPoA connections will use the
default setting for
Dynamic IP. Some users will be given a specific IP
address for the WAN interface. In this case you need to change this
setting to
Static IP. When Static IP is selected in the IP Control menu,
you need to type in the global IP address provided to you by your ISP.
The
IP Unnumbered option is used if you want to set up a non-TCP/IP
port protocol link through the WAN interface. An IP Unnumbered
interface does not have an IP address and therefore cannot be managed
via Telnet or any other TCP/IP application.
Static IP
If you have selected the
Static IP option in the IP Control menu, type in
the global IP address used for your WAN interface. Your ISP should
provide this IP address to you.
Enable PPTP
Point-to-Point Tunneling Protocol is a pass-through mechanism that
allows packets to pass through the Router. This enables the Router to
function as a bridge. Check this feature and enter the required
information in the ServerIP/Name, Route Target, Route Mask,
PPTP Account, PPTP Password, and MPPE Encryption fields.
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