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Page 41 / 212 Scroll up to view Page 36 - 40
DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
Basic Installation and Configuration
2-11
v1.0, April 2007
•
MTU Size.
The normal MTU value for most networks is 1500 Bytes, or 1492 for PPPoE
connections. For some ISPs, you may need to reduce the MTU size. However, this is rarely
required and should not be attempted unless you are sure it is necessary for your ISP
connection.
•
Port Speed (Ethernet only)
. Usually, your router can automatically determine the connection
speed of the 10/100 port. If you cannot establish an Internet connection and the Internet LED
blinks continuously, manually select the port speed.
If you know your Ethernet port on your broadband modem supports 100BaseT, select 100M;
otherwise, select 10M. Use the half-duplex settings unless you are sure you need full duplex.
•
Router MAC Address
. Each computer or router on your network has a unique 32-bit local
Ethernet address, known as the Media Access Control (MAC) address. In most cases the
default Use Default Address will suffice. If your ISP requires MAC authentication, then select
either:
–
Use This Computer’s MAC address, where the router will use the MAC address of the
computer you are now using, or
–
Use This MAC Address, where you manually enter the MAC address that your ISP
expects. The format is XX:XX:XX:XX:XX:XX.
If you set up an ADSL connection, in addition to the Advanced ADSL settings, there are some
additional specific ADSL settings that also should be configured. These include: Multiplexing
Method, VPI and VCI.
To configure your ADSL settings:
1.
Click he
ADSL Settings
link at the top of the
ADSL ISP Settings
screen. The
ADSL Settings
screen will display.
2.
Configure your ADSL Settings. If you don’t know your settings, contact your ISP. These
parameters must be submitted to correctly establish a DSL connection on the WAN interface:
a.
Multiplexing Method: Both VC-BASED multiplexing and LLC-BASED multiplexing
methods are supported.
Figure 2-6
Page 42 / 212
DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
2-12
Basic Installation and Configuration
v1.0, April 2007
b.
VPI (Virtual Path Identifier) value: This is provided by your ISP to identify the ATM
network (in conjunction with the VCI value).
c.
VCI (Virtual Channel Identifier) value: This is provided by your ISP (in conjunction with
the VPI value) to identify the ATM network.
3.
Click
Apply
to save your settings.
To configure your Advanced ADSL ISP Settings:
1.
Click the
Advanced
link at the tops of the
ADSL ISP Settings
screen. The
ADSL Advanced
Options
screen will display.
2.
Enter the
MTU Size
. The MTU (Maximum Transmit Unit) is the size of the largest packet that
can be sent over the network. The standard MTU value for Ethernet networks is usually 1500
Bytes and for PPPoE connections, it is 1492 Bytes. Unless a change is required by your ISP, it
is recommended that the MTU values be left as is.
3.
Enter the
Router's MAC Address.
Similar to other Ethernet devices, the router has its own
48-bit local Ethernet address, also referred to as the MAC (Media Access Control) address.
The default is set to Use default address.
–
If your ISP requires MAC authentication and another MAC address has been previously
registered with your ISP, then select either Use this Computer's MAC address to assign the
MAC address of the computer through which you are accessing the router.
–
Select Use This MAC Address and manually type in the MAC address expected by your
ISP.
Figure 2-7
Page 43 / 212
DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
Basic Installation and Configuration
2-13
v1.0, April 2007
The format for the MAC address is XX:XX:XX:XX:XX:XX where X is a number from 0 to 9
(inclusive) or an alphabetical letter between A and F (inclusive).
4.
Click
Apply
to save the settings. Click
Reset
to revert to the previous settings.
To configure you Ethernet ISP Advanced options:
1.
Select the
Advanced
link at the top of the
Ethernet ISP Settings
screen. The4
Ethernet
Advanced Options
screen will display.
2.
Enter the
MTU Size.
The MTU (Maximum Transmit Unit) is the size of the largest packet that
can be sent over the network. The standard MTU value for Ethernet networks is usually 1500
Bytes and for PPPoE connections, it is 1492 Bytes. Unless a change is required by your ISP, it
is recommended that the MTU values be left as is.
3.
Enter your
Port Speed.
Most new devices with Ethernet ports run at full-duplex, 100Mbps
modes. The router can automatically negotiate the speed with the other end of the Ethernet
connection. However, if the Internet LED blinks continuously, you may need to set the port
speed manually. This could occur with some older broadband modems. If the Ethernet port of
the broadband modem supports 100BaseT, select 100BaseT; otherwise, select 10BaseT. Use
the half-duplex settings if full-duplex modes do not function properly.
4.
Enter the
Router's MAC Address.
The router has its own 48-bit local Ethernet address, also
referred to as the MAC (Media Access Control) address. The default is set to Use default
address. If your ISP requires MAC authentication and another MAC address has been
previously registered with your ISP, then select either Use this Computer’s MAC address to
assign the MAC address of the computer through which you are accessing the router, or select
Use This MAC Address and manually type in the MAC address expected by your ISP. The
format for the MAC address is XX:XX:XX:XX:XX:XX where X is a number from 0 to 9
(inclusive) or an alphabetical letter between A and F (inclusive).
Figure 2-8
Page 44 / 212
DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
2-14
Basic Installation and Configuration
v1.0, April 2007
5.
Click
Apply
to save your settings.
Configuring the WAN Mode
The WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router can be configured
for NAT or Classical Routing. You must select one of them—NAT being the most common:
•
NAT
. NAT is the technology which allows all PCs on your LAN to share a single Internet IP
address. From the Internet, there is only a single device (the Router) and a single IP address.
PCs on your LAN can use any private IP address range, and these IP addresses are not visible
from the Internet.The Router uses NAT to select the correct PC (on your LAN) to receive any
incoming data.
•
Classical Routing
. In this mode, the Router performs Routing, but without NAT. To gain
Internet access, each PC on your LAN must have a valid Internet IP address.
If your ISP has allocated many IP addresses to you, and you have assigned one of these
addresses to each PC, you can choose Classical Routing. Or, you can use Classical Routing for
routing private IP addresses within a campus environment. Otherwise, selecting this method
will not allow Internet access through this Router.
Depending on the WAN port configuration of the ProSafe DGFV338, you can select one of two
options:
•
Auto-Rollover using WAN port
. If you have configured both the ADSL ISP and Ethernet ISP
WAN ports of the ProSafe Wireless ADSL Modem VPN Firewall Router, you can select auto-
rollover for increased system reliability. In this mode, the selected WAN interface is made
primary and the other is the rollover link. As long as the primary link is up, all traffic is sent
over the primary link. Once the primary WAN interface goes down, the rollover link is brought
up to send the traffic.
Note:
You can also set up the traffic meter for the Ethernet ISP, if desired, at this time.
See
“Programming the Traffic Meter” on page 2-20
.
Note:
If you only have a single Internet IP address, you MUST use NAT.
Page 45 / 212
DGFV338 ProSafe Wireless ADSL Modem VPN Firewall Router Reference Manual
Basic Installation and Configuration
2-15
v1.0, April 2007
•
Use Dedicated WAN port.
–
Dedicated ADSL
. If you have configured only the ADSL ISP, then select this interface. In
this mode the ADSL interface will always be active and all traffic will be sent over this
link; the other link will always be down. No link failure detection will occur.
–
Dedicated Ethernet.
If this is your only ISP configuration, then select Dedicated
Ethernet. In this mode the Ethernet interface will always be active and all traffic will be
sent over this link; the other link will always be down. No link failure detection will occur.
WAN failure is detected using DNS queries to a DNS server, or a Ping to an IP address. For each
WAN interface, DNS queries or Ping requests are sent to the specified IP address. If replies are not
received, the corresponding WAN interface is considered down.
•
DNS lookup using WAN DNS Servers (ISP DNS Servers).
In this case, DNS queries are
sent to the DNS server configured on the ADSL and Ethernet ISP pages (see
“Configuring
Your Internet Connection using Auto Detect” on page 2-4
).
•
DNS lookup using this DNS Server (for example, a public DNS Server)
, As an option, you
can enter any public DNS server address. DNS queries are sent to this server through the WAN
interface being monitored.
•
Ping to this IP address
. Enter a public IP address that will not reject the Ping request or will
not consider the traffic abuse. Queries are sent to this server through the WAN interface being
monitored.
•
Test Period
. DNS query is sent periodically after every test period. The default test period is
30 seconds.
•
Failover
. The WAN interface is considered down after the configured number of queries have
failed to elicit a reply from the configured DNS server or from the Ping destination. The
minimum number of failed queries is two. The rollover link is brought up after this, if Auto-
Rollover has been selected.
To configure the WAN mode:
1.
Select
Network Configuration
from the main menu and
WAN Mode
from the submenu. The
WAN Mode screen will display.
2.
Select either the
NAT
or
Classical Routing
radio button. If you have a single Internet address,
you must use NAT.

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