Netgear C6900 High Speed Cable Modem Router User Manual

350 East Plumeria Drive
San Jose, CA 95134 
USAJanuary 2017
202-11720-01
Nighthawk 
AC1900
 
WiFi Cable   Modem   Router
Model C6900
User Manual 

 
2 Nighthawk AC1900 WiFi Cable Modem Router 
Support
Thank you for purchasing this NETGEAR product. You can visit www.netgear.com/support to register your product, get help, access the latest downloads and user manuals, and join our community. We recommend that you use only official NETGEAR 
support resources.
Conformity
For the current EU Declaration of Conformity, visit http://kb.netgear.com/app/answers/detail/a_id/11621.
Compliance
For regulatory compliance information, visit...

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Contents
Chapter 1 Hardware Setup
Unpack Your Modem Router  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  7
Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Rear Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Position Your Modem Router . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

 
4 Nighthawk AC1900 WiFi Cable Modem Router 
Chapter 5 Specify Network Settings
View WAN Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  39
Set Up a Default DMZ Server  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  40
Change the Modem Router’s Device Name . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  41
Change the LAN TCP/IP Settings  . . . . . . . . . . . . . . . . . . . . . . . . . . . . ....

 
5  Nighthawk AC1900 WiFi Cable Modem Router
Application Example: Make a Local Web Server Public . . . . . . . . . . . . . . . . . .  78
How the Modem Router Implements the Port Forwarding Rule . . . . . . . . . .  78
Set Up Port Triggering  . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  79
Add a Port Triggering Service . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .  79
Application Example: Port Triggering for Internet Relay...

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1.   Hardware Setup
This chapter covers the following topics:
•Unpack Your Modem Router 
•Front Panel 
•Rear Panel 
•Position Your Modem Router 
•Cable Your Modem Router 
•Activate Your Internet Service 
•Activate Your Internet Service With Comcast XFINITY 
For more information about the topics covered in this manual, visit the support website at 
http://support.netgear.com. 

Hardware Setup 7
 Nighthawk AC1900
 WiFi Cable Modem  Router
Unpack Your Modem Router
Your package contains the following items.
Ethernet cable
Power adapter
Modem router
Figure 1. Package contents
Front Panel
The  modem router  has status LEDs and buttons on the front.
Power LED
Downstream LED
Upstream LED
Internet LED
WPS button / LED WiFi On/Off button
5 GHz LED
2.4 GHz LED
Ethernet LED
Figure 2. Modem router front view 

Hardware Setup 8
Nighthawk AC1900
 WiFi Cable Modem  Router 
You can use the LEDs to verify status and connections. The following table lists and 
describes each LED and button on the front panel of the modem router.
LEDDescription
Power 
•  Green. Power is supplied to the modem router.
•  Off. No power is supplied to the modem router.
•  Solid red . 
 Thermal cutoff mode. Power off the unit, let it cool, and move it away from 
heat sources (such as a TV, DVD player, or speakers) and keep it vertical in...

Hardware Setup 9
 Nighthawk AC1900
 WiFi Cable Modem  Router
Rear Panel
The rear panel has the connections and button shown the following figure\
.
Power adapter inputEthernet LAN ports
Coaxial cable connector
Reset button
Figure 3. Modem router rear panel
Position Your Modem Router
The modem router lets you access your network anywhere within the operat\
ing range of your 
wireless network. However, the operating distance or range of your wireless connection can 
vary significantly depending on the...

Hardware Setup 10
Nighthawk AC1900
 WiFi Cable Modem  Router 
•Place the modem router away from electrical devices such as these:
- Ceiling fans
- Home security systems
- Microwaves
- Computers
- Base of a cordless phone
- 2.4 GHz cordless phone
• Place the modem router away from large metal surfaces, large glass surfa\
ces, and 
insulated walls such as these:
- Solid metal doors
- Aluminum studs
- Fish tanks
- Mirrors
- Brick
- Concrete
Cable Your Modem Router
The most common way to cable your modem...