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Page 321 / 412 Scroll up to view Page 316 - 320
Chapter 40 Diagnostic
VMG8924-B10A and VMG8924-B30A Series User’s Guide
321
Note: This screen is available only when you configure an ATM layer-2 interface.
Figure 193
Maintenance > Diagnostic > OAM Ping
The following table describes the fields in this screen.
Table 152
Maintenance > Diagnostic > OAM Ping
LABEL
DESCRIPTION
Select a PVC on which you want to perform the loopback test.
F4 segment
Press this to perform an OAM F4 segment loopback test.
F4 end-end
Press this to perform an OAM F4 end-to-end loopback test.
F5 segment
Press this to perform an OAM F5 segment loopback test.
F5 end-end
Press this to perform an OAM F5 end-to-end loopback test.
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Page 323 / 412
VMG8924-B10A and VMG8924-B30A Series User’s Guide
323
C
HAPTER
41
Troubleshooting
This chapter offers some suggestions to solve problems you might encounter. The potential
problems are divided into the following categories.
•
Power, Hardware Connections, and LEDs
•
Device Access and Login
•
Internet Access
•
Wireless Internet Access
•
USB Device Connection
•
UPnP
41.1
Power, Hardware Connections, and LEDs
The Device does not turn on. None of the LEDs turn on.
1
Make sure the Device is turned on.
2
Make sure you are using the power adaptor or cord included with the Device.
3
Make sure the power adaptor or cord is connected to the Device and plugged in to an appropriate
power source. Make sure the power source is turned on.
4
Turn the Device off and on.
5
If the problem continues, contact the vendor.
One of the LEDs does not behave as expected.
1
Make sure you understand the normal behavior of the LED. See
Section 1.5 on page 21
.
2
Check the hardware connections.
3
Inspect your cables for damage. Contact the vendor to replace any damaged cables.
4
Turn the Device off and on.
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Chapter 41 Troubleshooting
VMG8924-B10A and VMG8924-B30A Series User’s Guide
324
5
If the problem continues, contact the vendor.
41.2
Device Access and Login
I forgot the IP address for the Device.
1
The default LAN IP address is 192.168.1.1.
2
If you changed the IP address and have forgotten it, you might get the IP address of the Device by
looking up the IP address of the default gateway for your computer. To do this in most Windows
computers, click
Start > Run
, enter
cmd
, and then enter
ipconfig
. The IP address of the
Default
Gateway
might be the IP address of the Device (it depends on the network), so enter this IP
address in your Internet browser.
3
If this does not work, you have to reset the device to its factory defaults. See
Section 1.6 on page
23
.
I forgot the password.
1
The default admin password is
1234
.
2
If this does not work, you have to reset the device to its factory defaults. See
Section 1.6 on page
23
.
I cannot see or access the
Login
screen in the web configurator.
1
Make sure you are using the correct IP address.
•
The default IP address is
192.168.1.1
.
•
If you changed the IP address (
Section 7.2 on page 109
), use the new IP address.
•
If you changed the IP address and have forgotten it, see the troubleshooting suggestions for
I
forgot the IP address for the Device.
2
Check the hardware connections, and make sure the LEDs are behaving as expected. See
Section
1.5 on page 21
.
3
Make sure your Internet browser does not block pop-up windows and has JavaScripts and Java
enabled. See
Appendix D on page 365
.
4
If it is possible to log in from another interface, check the service control settings for HTTP and
HTTPS (
Maintenance > Remote MGMT
).
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325
5
Reset the device to its factory defaults, and try to access the Device with the default IP address.
See
Section 1.6 on page 23
.
6
If the problem continues, contact the network administrator or vendor, or try one of the advanced
suggestions.
Advanced Suggestions
•
Make sure you have logged out of any earlier management sessions using the same user account
even if they were through a different interface or using a different browser.
•
Try to access the Device using another service, such as Telnet. If you can access the Device,
check the remote management settings and firewall rules to find out why the Device does not
respond to HTTP.
I can see the
Login
screen, but I cannot log in to the Device.
1
Make sure you have entered the password correctly. The default admin password is
1234
. The field
is case-sensitive, so make sure [Caps Lock] is not on.
2
You cannot log in to the web configurator while someone is using Telnet to access the Device. Log
out of the Device in the other session, or ask the person who is logged in to log out.
3
Turn the Device off and on.
4
If this does not work, you have to reset the device to its factory defaults. See
Section 41.1 on page
323
.
I cannot Telnet to the Device.
See the troubleshooting suggestions for
I cannot see or access the Login screen in the web
configurator.
Ignore the suggestions about your browser.
I cannot use FTP to upload / download the configuration file. / I cannot use FTP to upload
new firmware.
See the troubleshooting suggestions for
I cannot see or access the Login screen in the web
configurator.
Ignore the suggestions about your browser.

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