ZyXEL Communications G-470, User Manual

Page: 77 / 110

G-470 User’s Guide
Chapter 8 Troubleshooting 77
8.5 Problems with the Ethernet Interface
Table 22 Troubleshooting the Ethernet Interface
PROBLEM CORRECTIVE ACTION
I cannot access the
ZyXEL Device from
the LAN.
If the ETHN LED on the front panel is off, check the Ethernet cable connection
between your ZyXEL Device and the Ethernet device connected to the
ETHERNET port.
Check for faulty Ethernet cables.
Make sure your computer’s Ethernet adapter is installed and working properly.
Check the IP address of the Ethernet device. Verify that the IP address and the
subnet mask of the ZyXEL Device, the Ethernet device and your computer are
on the same subnet.
I cannot ping any
computer on the
LAN.
If the ETHN LED on the front panel is off, check the Ethernet cable connections
between your ZyXEL Device and the Ethernet device.
Check the Ethernet cable connections between the Ethernet device and the
LAN computers.
Check for faulty Ethernet cables.
Make sure the LAN computer’s Ethernet adapter is installed and working
properly.
Verify that the IP address and the subnet mask of the ZyXEL Device, the
Ethernet device and the LAN computers are on the same subnet.
I cannot access the
web configurator.
Your computer’s and the ZyXEL Device’s IP addresses must be on the same
subnet for LAN access.
If you changed the ZyXEL Device’s IP address, then enter the new one as the
URL.
If you don’t know the ZyXEL Device’s IP address, type the device name of your
ZyXEL Device as the URL. ZyXELXXXX is the default where “XXXX” is the last
four digits of the MAC address. The MAC address is on the bottom of the
device).
If you just changed the ZyXEL Device’s IP address, your computer’s cache of
machine names may contain an entry that maps the name of the ZyXEL Device
to its previous IP address.
In Windows, use
nbtstat -R at the command prompt to delete all entries in your
computer’s cache of machine names.
Open a new browser window.
See the following section to check that pop-up windows, JavaScripts and Java
permissions are allowed.
You may also need to clear your Internet browser’s cache.
In Internet Explorer, click
Tools and then Internet Options to open the Internet
Option s screen.
In the General tab, click Delete Files . In the pop-up window, select the Delete
all offline content check box and click OK . Click OK in the Internet Options
screen to close it.
If you disconnect your computer from one device and connect it to another
device that has the same IP address, your computer’s ARP (Address Resolution
Protocol) table may contain an entry that maps the management IP address to
the previous device’s MAC address).
In Windows, use
arp -d at the command prompt to delete all entries in your
computer’s ARP table.
Open a new browser window.