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Reference Manual for the MR814 v3 Cable/DSL Wireless Router
Troubleshooting
8-5
202-10039-01
Inform your ISP that you have bought a new network device, and ask them to use the router’s
MAC address.
OR
Configure your router to spoof your computer’s MAC address. This can be done in the Basic
Settings menu. Refer to
“How to Bypass the Configuration Assistant” on page 3-12
.
If your router can obtain an IP address, but your computer is unable to load any web pages from
the Internet:
Your computer may not recognize any DNS server addresses.
A DNS server is a host on the Internet that translates Internet names (such as www addresses)
to numeric IP addresses. Typically your ISP will provide the addresses of one or two DNS
servers for your use. If you entered a DNS address during the router’s configuration, reboot
your computer and verify the DNS address as described in
“Install or Verify Windows
Networking Components” on page C-9
. Alternatively, you may configure your computer
manually with DNS addresses, as explained in your operating system documentation
.
Your computer may not have the router configured as its TCP/IP gateway.
If your computer obtains its information from the router by DHCP, reboot the computer and
verify the gateway address as described in
“Install or Verify Windows Networking
Components” on page C-9
.
Troubleshooting a TCP/IP Network Using a Ping Utility
Most TCP/IP terminal devices and routers contain a ping utility that sends an echo request packet
to the designated device. The device then responds with an echo reply. Troubleshooting a TCP/IP
network is made very easy by using the ping utility in your computer or workstation.
Testing the LAN Path to Your Router
You can ping the router from your computer to verify that the LAN path to your router is set up
correctly.
To ping the router from a PC running Windows 95 or later:
1.
From the Windows toolbar, click on the Start button and select Run.
2.
In the field provided, type Ping followed by the IP address of the router, as in this example:
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Reference Manual for the MR814 v3 Cable/DSL Wireless Router
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Troubleshooting
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3.
Click on OK.
You should see a message like this one:
Pinging <IP address> with 32 bytes of data
If the path is working, you see this message:
Reply from < IP address >: bytes=32 time=NN ms TTL=xxx
If the path is not working, you see this message:
Request timed out
If the path is not functioning correctly, you could have one of the following problems:
Wrong physical connections
Make sure the LAN port LED is on. If the LED is off, follow the instructions in
“LAN
or WAN Port Lights Not On
” on
page 8-2
.
Check that the corresponding Link LEDs are on for your network interface card and
for the hub ports (if any) that are connected to your workstation and router.
Wrong network configuration
Verify that the Ethernet card driver software and TCP/IP software are both installed
and configured on your computer or workstation.
Verify that the IP address for your router and your workstation are correct and that the
addresses are on the same subnet.
Testing the Path from Your Computer to a Remote Device
After verifying that the LAN path works correctly, test the path from your computer to a remote
device. From the Windows run menu, type:
PING -n 10
<
IP address
>
where <
IP address
> is the IP address of a remote device such as your ISP’s DNS server.
If the path is functioning correctly, replies as in the previous section are displayed. If you do not
receive replies:
Check that your computer has the IP address of your router listed as the default gateway. If
the IP configuration of your computer is assigned by DHCP, this information will not be
visible in your computer’s Network Control Panel. Verify that the IP address of the router
is listed as the default gateway as described in
“Install or Verify Windows Networking
Components” on page C-9
.
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Reference Manual for the MR814 v3 Cable/DSL Wireless Router
Troubleshooting
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Check to see that the network address of your computer (the portion of the IP address
specified by the netmask) is different from the network address of the remote device.
Check that your cable or DSL modem is connected and functioning.
If your ISP assigned a host name to your computer, enter that host name as the Account
Name in the Basic Settings menu.
Your ISP could be rejecting the Ethernet MAC addresses of all but one of your computers.
Many broadband ISPs restrict access by only allowing traffic from the MAC address of
your broadband modem, but some ISPs additionally restrict access to the MAC address of
a single computer connected to that modem. If this is the case, you must configure your
router to “clone” or “spoof” the MAC address from the authorized computer. Refer to
“How to Bypass the Configuration Assistant” on page 3-12
.
Restoring the Default Configuration and Password
This section explains how to restore the factory default configuration settings, changing the
router’s administration password to
password
and the IP address to 192.168.0.1. You can erase the
current configuration and restore factory defaults in two ways:
Use the Erase function of the router (see
“Erasing the Configuration” on page 6-7
).
Use the Default Reset button on the rear panel of the router. Use this method for cases when
the administration password or IP address is not known.
To restore the factory default configuration settings without knowing the administration password
or IP address, you must use the Default Reset button on the rear panel of the router.
1.
Press and hold the Default Reset button until the power light blinks on (about 10 seconds).
2.
Release the Default Reset button and wait for the router to reboot.
If the router fails to restart or the power light continues to blink or turns solid amber, the unit
may be defective. If the error persists, you might have a hardware problem and should contact
technical support.
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Reference Manual for the MR814 v3 Cable/DSL Wireless Router
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Troubleshooting
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Problems with Date and Time
The E-Mail menu in the Content Filtering section displays the current date and time of day. The
MR814 v3 router uses the Network Time Protocol (NTP) to obtain the current time from one of
several Network Time Servers on the Internet. Each entry in the log is stamped with the date and
time of day. Problems with the date and time function can include:
Date shown is January 1, 2000. Cause: The router has not yet successfully reached a Network
Time Server. Check that your Internet access settings are configured correctly. If you have just
completed configuring the router, wait at least five minutes and check the date and time again.
Time is off by one hour. Cause: The router does not automatically sense Daylight Savings
Time. In the E-Mail menu, check or uncheck the box marked “Adjust for Daylight Savings
Time”.
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Technical Specifications
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Appendix A
Technical Specifications
This appendix provides technical specifications for the MR814 v3 Cable/DSL Wireless Router.
Network Protocol and Standards Compatibility
Data and Routing Protocols:
TCP/IP, RIP-1, RIP-2, DHCP
PPP over Ethernet (PPPoE)
Power Adapter
North America:
120V, 60 Hz, input
United Kingdom, Australia:
240V, 50 Hz, input
Europe:
230V, 50 Hz, input
Japan:
100V, 50/60 Hz, input
All regions (output):
12 V DC @ 1 A output, 20W maximum
Physical Specifications
Dimensions:
28 x 175 x 118 mm
(1.1 x 6.89 x 4.65 in.)
Weight:
0.3 kg
(0.66 lb)
Environmental Specifications
Operating temperature:
0
°
to 40
°
C
(32º to 104º F)
Operating humidity:
90% maximum relative humidity, noncondensing
Electromagnetic Emissions
Meets requirements of:
FCC Part 15 Class B

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