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ATU-R130 ADSL Ethernet Router User’s Guide
58
4.
Select the level of firewall security to apply to the interface by selecting the IPF Type as
Public, Private, or DMZ.
5.
In the Lower Interface dialog box, select the lower-level interface name over which this
protocol is being configured and click
. Typically, an IPoA interface is configured
to operate over an aal5 interface.
6. Click
.
A confirmation page will display to confirm your changes.
7. Click
to return to the EOA page and view the new interface in the table.
8.
Click the Admin tab, and then click
Commit & Reboot
in the task bar.
9. Click
to save your changes to permanent memory.
Page 67 / 74
ATU-R130 ADSL Ethernet Router User’s Guide
59
13
Configuring Bridging
The ATU-R130 can be configured to act as a bridging device between your LAN and your ISP.
Bridges are devices that enable two or more networks to communicate as if they are two
segments of the same physical LAN. This chapter describes how to configure the ATU-R130 to
operate as a bridge.
Note
Before changing your bridge configuration, check with your ISP to
determine the type of connection they use to exchange data with
their customer’s DSL modems (such as Ethernet bridging or IP
routing).
Using the Bridging Feature
Although the ATU-R130 is preconfigured to serve as a router for providing Internet connectivity to
you LAN, there are several instances in which you may also want to configure bridging:
?
Your ISP may use protocols that require bridging with your LAN. The device can be
configured to appear as a bridge when communicating with your ISP, while continuing to
provide router functionality for your LAN.
?
Your LAN may include computers that communicate using “
layer-3”protocols other than
the Internet Protocol. These include IPX
®
and AppleTalk
®.
. In this case, the device can be
configured to act as a bridge for packets that use these protocols while continuing to
serve as a router for IP data.
In both cases, you need to specify the device’s interfaces as bridge interfaces.
Defining Bridge Interfaces
To enable bridging
{
XE "Bridging:defining interfaces"
}
, you simply specify the device interfaces on
which you want to bridge data, and then enable bridging mode:
1.
Log into Configuration Manager and click the Bridging tab.
The Bridge Configuration page displays, as shown in Figure 45.
Figure 44. Bridge Configuration page{ XE "Bridge Configuration Page" }{ XE "Pages:Bridge
Configuration" }
The table may be empty
{
XE "Bridge Configuration page"
}{
XE "Pages:Bridge
Configuration"
}
if bridging has not yet been configured.
2.
Select the interface names on which you want to perform bridging and click
.
For example, select
eth-0
(LAN) and
eoa-0
(WAN) interfaces. If you use such protocols on a
USB-connected computer, you can also select
usb-0
.
Page 68 / 74
ATU-R130 ADSL Ethernet Router User’s Guide
60
Note
You have to create an entry for usb-0 inferface via RS-232 cable.
Please refer the procedure on page 10 and type “create bridge
port intf ifname usb-0”
on step 7.
If you do not have an eoa-0 interface, but instead have an
interface named
ppp-0
or
ipoa-0
, your device is not currently
configured with a WAN interface that allows bridging with your
ISP. You may want to check with your ISP to determine whether
they use the eoa protocol. See Chapter 11 for instructions on
creating an EOA interface.
Note
If you enable bridging
{
XE "Bridging:with IP-enabled interfaces"
}
on an interface that has already been assigned an IP address,
then it is considered IP-enabled and will route (rather than bridge)
IP packets received on the interface. The interface will bridge non-
IP data it receives, however.
You can determine whether the Ethernet (eth-0) and USB (usb-0)
interfaces have been assigned IP addresses by displaying the IP
Address Table (display the Routing tab, and then click
IP
Address
). These interfaces will display in the table only if they
have been assigned IP addresses.
You can check whether the eoa-0 interface has been assigned an
IP address by displaying the EOA configuration table (click the
WAN tab, and then click
EOA
). If the Config IP Address field is
empty and the Use DHCP field contains the word Disable, then no
IP address has been assigned.
3. Click the
Enable
radio button to turn on bridging.
4.
Click
.
A page will briefly display to confirm your changes, and will return you to the Bridge
Configuration page.
5.
Click the Admin tab, and then click
Commit & Reboot
in the task bar.
6. Click
to save your changes to permanent memory.
Deleting a Bridge Interface
1.
To make an interface non-bridgeable, display the Bridge Configuration page and click
next to the interface you want to delete. Click
to confirm the deletion. The
interface remains defined in the system, but is no longer capable of performing bridging.
Page 69 / 74
ATU-R130 ADSL Ethernet Router User’s Guide
Index
61
A
Troubleshooting
{
XE "Troubleshooting"
}
This appendix suggests solutions for problems you may encounter in
installing or using the ATU-R130, and provides instructions for using several IP utilities to
diagnose problems.
Contact Customer Support if these suggestions do not resolve the problem.
Problem
Troubleshooting Suggestion
LEDs
Power LED does not
illuminate after product is
turned on.
{
XE "LEDs:troubleshooting"
}
Verify that you are
using the power cable provided with the device and
that it is securely connected to the ATU-R130 and a
wall socket/power strip.
LINK WAN LED does
not illuminate after
phone cable is attached.
Verify that a standard telephone cable like the one
provided is securely connected to the ADSL port and
your wall phone jack. Wait 30 seconds to allow the
device to negotiate a connection with your ISP.
LINK LAN LED does not
illuminate after Ethernet
cable is attached.
Verify that the Ethernet cable is securely connected
to your LAN hub or PC and to the ATU-R130. Make
sure the PC and/or hub is turned on.
Verify that you are using a straight-through
{
XE
"Ethernet cable:straight-through vs crossover"
}
type
Ethernet cable to the uplink port on a hub or a cross-
over type cable to a stand-alone PC. If you
connected the device to an ordinary hub port (not
Uplink), you must use a straight-through cable. (Hold
the connectors at each end of the cable side-by-side
in the same position. If the order of their color-coded
wire pairs is the same, it is a straight-through type.)
Contact Customer Support if your cable is not the
correct type.
Verify that your cable is sufficient for your network
requirements. A 100 Mbit/sec network (10BaseTx)
should use cables labeled Cat 5. 10Mbit/sec cables
may tolerate lower quality cables.
Internet Access
PC cannot access Internet
{
XE "Internet:troubleshooting access to"
}
Use the
ping utility, discussed in the following section, to
check whether your PC can communicate with the
ATU-R130’s LAN IP address (by default
192.168.1.1). If it cannot, check the Ethernet cabling.
If you statically assigned a private IP address to the
computer, (not a registered public address), verify
the following:
Check that the gateway IP address on the
computer is your public IP address.
If it is not, correct
the address or configure the PC to receive IP
information automatically.
Verify with your ISP that the DNS server
specified for the PC is valid. Correct the address or
configure the PC to receive this information
automatically.
Verify that a Network Address Translation
rule has been defined on the ATU-R130 to translate
the private address to your public IP address. The
assigned IP address must be within the range
specified in the NAT rules (see Chapter 7). Or,
configure the PC to accept an address assigned by
another device. The default configuration includes a
NAT rule for all dynamically assigned addresses
within a predefined pool (see the instructions in
Chapter 6 to view the address pool).
Page 70 / 74
Index
ATU-R130 ADSL Ethernet Router User’s Guide
62
Problem
Troubleshooting Suggestion
PCs cannot display web
pages on the Internet.
Verify that the DNS server specified on the PCs is
correct for your ISP, as discussed in the item above.
You can use the ping utility, discussed in the following
section, to test connectivity with your ISP’s DNS server.
Configuration Manager Program
You forgot/lost your
Configuration Manager
user ID or password
{
XE
"Password:recovering"
}
.
{
XE "Configuration Manager:troubleshooting"
}
If you
have not changed the password from the default, try
using “root” as both the user ID and password.
Otherwise, you can reset the device to the default
configuration by pressing the Reset button on the
back panel of the device (using a pointed object
such as a pen tip). Then, type the default User ID
and password shown above.
WARNING:
Resetting
the device removes any custom settings and returns
all settings to their default values.
Cannot access the
Configuration Manager
program from your
browser.
Use the ping utility, discussed in the following
section, to check whether your PC can communicate
with the ATU-R130’s LAN IP address (by default
192.168.1.1). If it cannot, check the Ethernet cabling.
Verify that you are using Internet Explorer v5.0 or later,
or Netscape Navigator v4.7 or later. Support for
Javascript® must be enabled in your browser. Support
for Java® may also be required.
Verify that the PC’s IP address is defined as being on
the same subnet as the IP address assigned to the LAN
port on the ATU-R130.
Changes to
Configuration Manager
are not being retained.
Be sure to use the Commit function after any changes.
This function is described on page 17.

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