Netgear D6400 Ac1600 Wifi Vdsl Adsl Modem Router 802 11ac Dual Band Gigabit User Manual

							Troubleshooting 
281  AC1600 WiFi VDSL/ADSL Modem Router Model D6400
•Does your WiFi device support the security that you are using for your WiFi network 
(WEP, WPA, or WPA2)? For information about changing the WiFi security, see 
Manage 
the Basic WiFi Settings and WiFi Security of the Main Network on page 93.
Tip:If you want to change the WiFi settings of the modem router’s main 
network, use a wired connection to avoid being disconnected when 
the new WiFi settings take effect.
If your WiFi device finds your network but the signal strength is weak, check these conditions:
•Is your modem router too far from your WiFi device or too close? Place your WiFi device 
near the modem router but at least 6 feet (1.8 meters) away and see whether the signal 
strength improves.
•Are objects between the modem router and your WiFi device blocking the WiFi signal?
Troubleshoot Your Network Using the Ping Utility
Most network 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. You can easily 
troubleshoot a network using the ping utility in your computer or workstation. 
Test the LAN Path to Your Modem Router
You can ping the modem router from your computer to verify that the LAN path to your 
modem router is set up correctly.
To ping the modem router from a Windows computer:
1. From the Windows taskbar, click the Start button and select Run.
2. In the field provided, enter ping followed by the IP address of the modem router, as in this 
example:
ping 192.168.0.1
3. Click the OK button.
A message such as the following one displays:
Pinging  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 
						

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282 AC1600 WiFi VDSL/ADSL Modem Router Model D6400 
If the path is not functioning correctly, one of the following problems might be occurring:
•Wrong physical connections
For a wired connection, make sure that the numbered LAN port LED is lit for the port to 
which you are connected.
Check that the appropriate LEDs are on for your network devices. If your modem router 
and computer are connected to a separate Ethernet switch, make sure that the link LEDs 
are lit for the switch ports that are connected to your computer and modem router.
•Wrong network configuration
Verify that the Ethernet card driver software and TCP/IP software are both installed and 
configured on your computer. 
Verify that the IP address for your modem router and your computer are correct and that 
the addresses are on the same subnet.
Test the Path from Your Computer to a Remote Device
After you verify that the LAN path works correctly, test the path from your computer to a 
remote device:
1. From the Windows toolbar, click the Start button and select Run.
2. In the field provided, enter
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 described in Test the LAN Path to Your Modem 
Router on page 281 display. If you do not receive replies, do the following:
•Check that the IP address of your modem router is listed as the default router in your 
computer. If the IP configuration of your computer is assigned by DHCP, this information 
is not visible in your computer’s Network Control Panel. Verify that the IP address of the 
modem router is listed as the default router.
•Check 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.
•If your ISP assigned a host name to your computer, enter that host name as the account 
name (see 
Manually Set Up an ADSL Internet Connection on page 47).
•Your ISP might be rejecting the Ethernet MAC addresses of all but one of your 
computers.
Many broadband ISPs restrict access by allowing traffic only from the MAC address of 
your modem, but some additionally restrict access to the MAC address of a single 
computer connected to that modem. In this case, configure your modem router to clone or 
spoof the MAC address from the authorized computer (see 
Manually Set Up an ADSL 
Internet Connection on page 47). 
						

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A
A.   Supplemental Information
This appendix covers the following topics: 
•Factory Settings
•Technical Specifications 
						

							 Supplemental Information
284 AC1600 WiFi VDSL/ADSL Modem Router Model D6400 
Factory Settings
You can reset the modem router to the factory default settings that are shown in the following 
table. 
For more information about resetting the modem router to its factory settings, see Return the 
Modem Router to Its Factory Default Settings on page 222.
Table 5.  D6400 modem router factory default settings 
FeatureDefault Settings
Router login
User login URLhttp://routerlogin.net, http://routerlogin.com, or http://192.168.0.1
User name (case-sensitive)admin 
Login password (case-sensitive)password
Internet connection
WAN MAC addressUse default hardware address
WAN MTU size1500
Port speedAutosensing
Local network (LAN)
LAN IP address192.168.0.1
Subnet mask255.255.255.0
DHCP serverEnabled
DHCP range192.168.0.2 to 192.168.0.254
DHCP starting IP address192.168.0.2
DHCP ending IP address192.168.0.254
DMZDisabled
Time zone• North America:  Pacific  Standard Time
• Europe: GMT
• Other continents: Varies by region
Time adjusted for daylight saving timeDisabled
Main WiFi network
WiFi communicationEnabled
SSID nameSee product label
SSID broadcastEnabled
SecurityWPA2-PSK (AES) 
						

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285  AC1600 WiFi VDSL/ADSL Modem Router Model D6400
WiFi network key (passphrase)See product label
Country/region• North America:  United  States
• Europe: Europe
• Other continents: Varies by region
RF channelAuto. The available channels depend on the region.
Transmission speedAuto1
Operating mode• Up to 300 Mbps at 2.4 GHz
• Up to 1300 Mbps at 5 GHz
Guest WiFi network
WiFi communicationDisabled
SSID name• 2.4 GHz band: NETGEAR-Guest
• 5 GHz band: NETGEAR-5G-Guest
SSID broadcastEnabled
SecurityNone (open network)
Allow guests to access main networkDisabled
General WiFi settings
Radio transmission power100 percent, nonconfigurable
20/40 MHz coexistence Enabled
Fragmentation length2346
CTS/RTS threshold2347
Preamble modeLong Preamble
WPS
WPS capabilityEnabled
Modem router’s PINEnabled, see the modem router’s web pages (path ADVANCED > 
Advanced Setup > Wireless Settings)
Keep Existing Wireless SettingsEnabled
1. Maximum WiFi signal rate derived from IEEE Standard 802.11 specifications. Actual throughput can vary. Network conditions 
and environmental factors, including volume of network traffic, building materials and construction, and network overhead, lower 
actual data throughput rate.
Table 5.  D6400 modem router factory default settings (continued)
FeatureDefault Settings 
						

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286 AC1600 WiFi VDSL/ADSL Modem Router Model D6400 
Technical Specifications
Table 6.  D6400 modem router specifications 
FeatureDescription
Data and routing protocolsTCP/IP, RIP-1, RIP-2, DHCP, PPPoE, PPTP, Bigpond, Dynamic DNS, UPnP, 
and SMB
Power adapter• North America: 120V, 60 Hz, input
• UK, Australia: 240V, 50 Hz, input
• Europe: 230V, 50 Hz, input
• All regions: 12V @ 2.5 A output
DimensionsDimensions: 191 mm x 198.5 mm x 65 mm (7.5 in. x 7.8 in. x 2.6 in.)
WeightWeight: 422 g (0.93 lb)
Operating temperature0° to 40°C  (32º to 104ºF)
Operating humidity90% maximum relative humidity, noncondensing
Electromagnetic emissions• EN 55022:2010/AC:2011, Class B 
• CISPR 22:2008, Class B
• AS/NZS CISPR 22:2009/Amdt 1:2010, Class B 
LANFour RJ-45 LAN ports supporting 10BASE-T, 100BASE-TX, and 1000BASE-T
WANOne RJ-45 Internet port supporting 10BASE-T, 100BASE-TX, and 1000BASE-T
DSLOne RJ-11 DSL port for ADSL or VDSL service
WiFiMaximum WiFi signal rate complies with the IEEE 802.11 standard. See the 
footnote for the table in 
Factory Settings on page 284.
Radio data ratesAuto-rate sensing
Data encoding standards• IEEE 802.11ac 2.0
• IEEE 802.11n version 2.0
• IEEE 802.11n 256QAM IEEE 802.11g, IEEE 802.11b 2.4 GHz  
IEEE 802.11n, IEEE 802.11a 5.0 GHz
Maximum computers per 
WiFi networkLimited by the amount of WiFi network traffic generated by each node (typically 
50–70 nodes). 
						

							 Supplemental Information
287  AC1600 WiFi VDSL/ADSL Modem Router Model D6400
Operating frequency range• 2.4 GHz band
-  US: 2.412–2.462 GHz
-  Europe: 2.412–2.472 GHz
-  Australia: 2.412–2.472 GHz
-  Japan: 2.412–2.472 GHz
• 5 GHz band
-  US: 5.18–5.24 + 5.745–5.825 GHz
-  Europe: 5.18–5.24 GHz and DFS (5.25–5.35 + 5.47–5.725, excluding 
5.60–5.65)
-  Australia: 5.18–5.24 + 5.745–5.825 GHz and DFS (5.25–5.35 + 
5.47–5.725, excluding5.60–5.65)
-  Japan: 5.18–5.24 GHz
802.11 securityWPA2-PSK, WPA/WPA2, WPA/WPA2 Enterprise, and WEP
xDSL data rate• VDSL2, VDSL, ADSL2+, ADSL2, and ADSL multimode
• Up to 100 Mbps, both upstream and downstream
• Supports Annex A,  I,  L,  and  M
• Supports all VDSL2 profiles: 8a, 8b, 8c, 8d, 12a, 12b, and 17a
• Supports G.INP
• Enables Seamless Rate Adaptation (SRA)
• VDSL2 interface compliance with ITU-T993.2
• G.992.1 (G.dmt), Annex A compliant
• G.992.2 (G.lite), Annex A compliant
• ANSI T1.413 compliant
• G.992.3  (ADSL2)  compliant, Annex A,  L,  and  M
• G.992.5 (ADSL2+) compliant, supporting Annex A and M
• G.993.2  compliant, Annex A
• G.993.5 (Vectoring)
• ATM and PTM (dual-priority)
Table 6.  D6400 modem router specifications (continued)
FeatureDescription