Netgear C6250 Ac1600 Wifi Cable Modem Router User Manual

Diagnostics and Troubleshooting 181
 AC1600 WiFi Cable Modem Router
Perform Diagnostics
The modem router lets you perform various diagnostic tasks. For normal o\
peration, these 
tasks are not required.
Ping an IP Address
Use this test to send a ping packet request to an IP address to test the\
 connection. If the 
request times out because no reply is received, the destination might be\
 unreachable. 
However, some network devices can be configured not to respond to a ping.
To ping an IP address:
1....

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AC1600 WiFi Cable Modem Router 
The following table describes the fields for the ping settings on the Di\
agnostics page.
FieldDescription
Target Enter the IP address of the device that you want to ping.
Ping Size (in bytes) Enter the size of the ping packet. By default, the packet size is 64 byt\
es.
No. of Pings Enter the number of times that the IP address is pinged. By default, the\
 ping is sent 
three times.
Ping Interval (in ms) Enter the interval between the...

Diagnostics and Troubleshooting 183
 AC1600 WiFi Cable Modem Router
7. 
Enter the traceroute settings.
The following table describes the fields for the traceroute settings on \
the Diagnostics  page.
FieldDescription
Target (IP address or  Name) Enter the IP address or host name of the device that you want to trace.
Max Hops Enter the maximum number of hops for the trace. By default, the maximum \
number 
of hops is 30.
Data Size (in bytes) Enter the size of the probe packet. By default, the probe packet...

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AC1600 WiFi Cable Modem Router 
Quick Tips for Troubleshooting
The following table includes tips for troubleshooting some common proble\
ms. 
Table 5.  Quick tips for troubleshooting
ProblemPossible Solution
Your network is unresponsive  or does not function normally
 .Restart your network:
1.
T
urn off the modem router.
2.T
urn on the modem router
3. W
ait two minutes.
Your cannot connect over an  Ethernet cable to the modem 
router. • 
Make sure that the Ethernet...

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 AC1600 WiFi Cable Modem Router
Troubleshoot with the LEDs
When you turn on the power, the LEDs light as described here:
1. 
When power is first applied, the Power LED 
 lights red for a second and then turns 
green.
2.  After about 15 seconds, the Downstream LED 
, Upstream LED , and Internet 
LED 
 start blinking green.
3.  After about 35 seconds, the 2.4 GHz LED 
 lights green.
4.  After about 45 seconds, the 5 GHz LED 
 lights green.
5.  When the modem router...

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AC1600 WiFi Cable Modem Router 
If the error persists, an unrecoverable firmware or hardware problem occ\
urred. For recovery 
instructions or help with a hardware problem, contact technical support.\
If the Power LED turns red in any other situation, the modem router beca\
me overheated and 
entered thermal cutof

f mode. In this situation, do the following:
1.  T
urn the power off.
2.  Let the  modem router cool.
Move the modem router away from heat sources (such as...

Diagnostics and Troubleshooting 
187  AC1600 WiFi Cable Modem Router
•If your modem router’s IP address was changed and you do not know the current IP 
address, use an IP scanner application to detect the IP address. If you still cannot find the 
IP address, clear the modem router’s configuration to factory defaults. This sets the 
modem router’s IP address to 192.168.0.1. For more information, see 
Return the Modem 
Router to Its Factory Default Settings on page 11 3 and Factory Default Settings on...

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AC1600 WiFi Cable Modem Router 
The Event Log page displays a table that shows, for each event, the time\
 that the event 
occurred, the priority of the event (0 being the highest priority and 6\
 the lowest), and a 
detailed description.
The previous figure show an event with priority 3 that occurs when the m\
odem router  cannot synchronize its time with a server
 .
6.  T
o refresh the page, click the  Refresh button.
The information onscreen is updated.
7.  T
o...

Diagnostics and Troubleshooting 189
 AC1600 WiFi Cable Modem Router
Downstream and Upstream LEDs Are Amber or Green
If the Downstream and Upstream LEDs light solid amber or solid green (o\
r one LED lights 
solid green and the other lights solid amber), the cable connection is \
good. You can be 
confident that the service provider connected your line correctly and th\
at your wiring is 
correct.
The Downstream LED or Upstream LED Is Blinking Green
If the Downstream LED is blinking green, the modem...

Diagnostics and Troubleshooting 
190 AC1600 WiFi Cable Modem Router 
To check the Internet IP address:
1. Launch an Internet browser from a computer or WiFi device that is connected to the 
network.
2. Type http://www.routerlogin.net.
A login window opens.
3. Type admin for the user name and type your password.
If you did not yet personalize your password, type password for the password.
4. Click the OK button.
The BASIC Home page displays.
5. Select ADVANCED > ADVANCED Home.
The ADVANCED Home page...