Comtrend Corporation WR-6891u User manual

WR-6891u
FTTH Gateway
User Manual
261
097
-
018
Version A1.0, May 28, 2015

1
Preface
This manual provides information related to the installation and operation of this
device. The individual reading this manual is presumed to have a basic
understanding of telecommunications terminology and concepts.
If you find the product to be inoperable or malfunctioning, please contact technical
support for immediate service by email at INT[email protected]
For product update, new product release, manual revision, or software upgrades,
please visit our website at http://www.comtrend.com
Important Safety Instructions
With reference to unpacking, installation, use, and maintenance of your electronic
device, the following basic guidelines are recommended:
• Do not use or install this product near water, to avoid fire or shock hazard. For
example, near a bathtub, kitchen sink or laundry tub, or near a swimming pool.
Also, do not expose the equipment to rain or damp areas (e.g. a wet basement).
• Do not connect the power supply cord on elevated surfaces. Allow it to lie freely.
There should be no obstructions in its path and no heavy items should be placed
on the cord. In addition, do not walk on, step on, or mistreat the cord.
• Use only the power cord and adapter that are shipped with this device.
• To safeguard the equipment against overheating, make sure that all openings in
the unit that offer exposure to air are not blocked.
• Avoid using a telephone (other than a cordless type) during an electrical storm.
There may be a remote risk of electric shock from lightening. Also, do not use
the telephone to report a gas leak in the vicinity of the leak.
• Never install telephone wiring during stormy weather conditions.
CAUTION:
 To reduce the risk of fire, use only No. 26 AWG or larger
telecommunication line cord.
 Always disconnect all telephone lines from the wall outlet before servicing
or disassembling this equipment.
WARNING
 Disconnect the power line from the device before servicing.
 Power supply specifications are clearly stated in Appendix C –
Specifications.

2
Copyright
Copyright©2015 Comtrend Corporation. All rights reserved. The information
contained herein is proprietary to Comtrend Corporation. No part of this document
may be translated, transcribed, reproduced, in any form, or by any means without
prior written consent of Comtrend Corporation.
This program is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License
along with this program. If not, see http://www.gnu.org/licenses/
NOTE: This document is subject to change without notice.
Protect Our Environment
This symbol indicates that when the equipment has reached the end of
its useful life, it must be taken to a recycling centre and processed
separate from domestic waste.
The cardboard box, the plastic contained in the packaging, and the parts that make
up this router can be recycled in accordance with regionally established regulations.
Never dispose of this electronic equipment along with your household waste; you
may be subject to penalties or sanctions under the law. Instead, please be
responsible and ask for disposal instructions from your local government.

3
Table of Contents
CHAPTER 1 INTRODUCTION...........................................................................................................6
1.1APPLICATION ...................................................................................................................................7
CHAPTER 2 INSTALLATION.............................................................................................................8
2.1 HARDWARE SETUP...........................................................................................................................8
2.2 LED INDICATORS ..........................................................................................................................10
CHAPTER 3 WEB USER INTERFACE............................................................................................12
3.1 DEFAULT SETTINGS .......................................................................................................................12
3.2 IPCONFIGURATION........................................................................................................................12
3.3 LOGIN PROCEDURE........................................................................................................................15
CHAPTER 4 DEVICE INFORMATION...........................................................................................17
4.1WAN.............................................................................................................................................18
4.2 STATISTICS.....................................................................................................................................19
4.2.1LAN Statistics .................................................................................................................19
4.2.2WAN Service...................................................................................................................20
4.3 ROUTE...........................................................................................................................................21
4.4ARP...............................................................................................................................................22
4.5 DHCP ...........................................................................................................................................22
4.6 NAT SESSION ................................................................................................................................24
4.7 IGMPPROXY ................................................................................................................................25
4.8 IPV6 ..............................................................................................................................................26
4.8.1 IPv6 Info................................................................................................................................26
4.8.2 IPv6 Neighbor .......................................................................................................................27
4.8.3 IPv6 Route.............................................................................................................................28
4.9 NETWORK MAP .............................................................................................................................29
4.10WIRELESS....................................................................................................................................30
4.10.1 Station Info ..........................................................................................................................30
4.10.2 Site Survey ...........................................................................................................................31
CHAPTER 5 BASIC SETUP...............................................................................................................32
5.1WAN SETUP ...................................................................................................................................33
5.1.1 WAN Service Setup ................................................................................................................34
5.2 NAT ..............................................................................................................................................35
5.2.1Virtual Servers................................................................................................................35
5.2.2Port Triggering...............................................................................................................38
5.2.3DMZ Host.......................................................................................................................40
5.2.4 IP Address Map...............................................................................................................41
5.2.5 IPSEC ALG.....................................................................................................................43
5.2.6 SIP ALG..........................................................................................................................44
5.3 LAN..............................................................................................................................................45
5.3.1 LAN IPv6 Autoconfig.............................................................................................................48
5.3.2 Static IP Neighbor.................................................................................................................51
5.3.3 UPnP.....................................................................................................................................52
5.4WIRELESS......................................................................................................................................53
5.4.1 Basic......................................................................................................................................53
5.4.2 Security..................................................................................................................................55
5.5 PARENTAL CONTROL .....................................................................................................................58
5.5.1Time Restriction..............................................................................................................58
5.5.2URL Filter.......................................................................................................................59
5.6 HOME NETWORKING......................................................................................................................61
5.6.1 Print Server ...........................................................................................................................61
5.6.2 DLNA.....................................................................................................................................61
5.6.3 Storage Service......................................................................................................................62
CHAPTER 6ADVANCED SETUP.....................................................................................................63
6.1AUTO-DETECTION SETUP ...............................................................................................................63

4
6.2 SECURITY ......................................................................................................................................67
6.2.1IP Filtering.....................................................................................................................67
6.2.2MAC Filtering.................................................................................................................70
6.3 QUALITY OF SERVICE (QOS)..........................................................................................................72
6.3.1QoS Queue Setup............................................................................................................73
6.3.2QoS Policer ....................................................................................................................75
6.3.3 QoS Classification..........................................................................................................77
6.4 ROUTING .......................................................................................................................................79
6.4.1Default Gateway.............................................................................................................79
6.4.2Static Route.....................................................................................................................80
6.4.3Policy Routing ................................................................................................................81
6.4.4 RIP..................................................................................................................................82
6.5 INTERFACE GROUPING...................................................................................................................83
6.6 IPTUNNEL.....................................................................................................................................86
6.6.1 IPv6inIPv4.............................................................................................................................86
6.6.2 IPv4inIPv6.............................................................................................................................87
6.7 CERTIFICATE..................................................................................................................................88
6.7.1Local...............................................................................................................................88
6.7.2Trusted CA......................................................................................................................90
6.8 POWER MANAGEMENT ..................................................................................................................91
6.9 MULTICAST ...................................................................................................................................92
6.10WIRELESS....................................................................................................................................94
6.10.1 Basic....................................................................................................................................94
6.10.2 Security................................................................................................................................96
6.10.3 WPS .....................................................................................................................................99
6.10.4 MAC Filter.........................................................................................................................100
6.10.5 Wireless Bridge..................................................................................................................102
6.10.6 Advanced ...........................................................................................................................103
CHAPTER 7 DIAGNOSTICS...........................................................................................................106
7.1 DIAGNOSTICS –INDIVIDUAL TESTS .............................................................................................106
7.2 FAULT MANAGEMENT..................................................................................................................107
7.3 UPTIME STATUS ...........................................................................................................................108
7.4 PING ............................................................................................................................................108
7.5 TRACE ROUTE .............................................................................................................................109
7.6 SYSTEM UTILIZATION..................................................................................................................110
CHAPTER 8 MANAGEMENT ........................................................................................................ 111
8.1 SETTINGS.....................................................................................................................................111
8.1.1Backup Settings............................................................................................................. 111
8.1.2Update Settings.............................................................................................................112
8.1.3Restore Default.............................................................................................................112
8.2 SYSTEM LOG ...............................................................................................................................113
8.3 SNMPAGENT .............................................................................................................................115
8.4 TR-069 CLIENT ...........................................................................................................................116
8.5 INTERNET TIME ...........................................................................................................................118
8.6ACCESS CONTROL .......................................................................................................................119
8.6.1 Passwords......................................................................................................................... 119
8.6.2 Service Access...................................................................................................................121
8.6.3 IP Address.........................................................................................................................122
8.7 UPDATE SOFTWARE .....................................................................................................................123
8.8 REBOOT.......................................................................................................................................124
CHAPTER 9 LOGOUT.....................................................................................................................125
APPENDIX A - FIREWALL .............................................................................................................126
APPENDIX B - PIN ASSIGNMENTS..............................................................................................129
APPENDIX C – SPECIFICATIONS................................................................................................130
APPENDIX D - SSH CLIENT ..........................................................................................................132

5
APPENDIX E - CONNECTION SETUP.........................................................................................133
APPENDIX F - WPS OPERATION .................................................................................................149
APPENDIX G - PRINTER SERVER...............................................................................................154

6
Chapter 1 Introduction
The WR-6891u is an 802.11n 2.4GHz concurrently compliant VoIP Gateway. It
employs a 10/100/1000 Base-T Gigabit Ethernet port for WAN, four 10/100/1000 Base-T
Gigabit Ethernet ports for LAN, one USB Host, one WiFi On-Off/WPS button, and an
integrated 802.11n 2.4GHz(2T2R) for WLAN Access Point (AP), which is backward
compatible with 802.11b/g; therefore WR-6891u allows both wired LAN connectivity and
wireless connectivity. It is also capable of facilitating predictable, real-time, toll-quality
voice over the Internet.
WR-6891u connects to xDSL or GPON (Gigabit-Capable Passive Optical Network)
modem and supports state-of-the-art security features such as WPA data encryption,
Firewall & VPN pass through. It is designed for both residential and business
applications that require wireless and wired connectivity. WR-6891u is also designed
with a TR-068 compliant color panel and LED indicators for easy installation and
user-friendliness. WR-6891u supports Triple services (Data+VoIP+IPTV) by wired or
wireless protocol.

7
1.1 Application
The following diagram depicts the application of the WR-6891u with GPON.

8
Chapter 2 Installation
2.1 Hardware Setup
Follow the instructions below to complete the hardware setup.
BACK PANEL
The figure below shows the back panel of the device.
Power ON
Press the power button to the OFF position (OUT). Connect the power adapter to the
power port. Attach the power adapter to a wall outlet or other AC source. Press the
power button to the ON position (IN). If the Power LED displays as expected then
the device is ready for setup (see section 2.2 LED Indicators).
Caution 1: If the device fails to power up, or it malfunctions, first verify that the
power cords are connected securely. Then power it on again. If the
problem persists, contact technical support.
Caution 2: Before servicing or disassembling this equipment, disconnect all power
cords and telephone lines from their outlets.
Reset Button
Restore the default parameters of the device by pressing the Reset button for 5 to
10 seconds. After the device has rebooted successfully, the front panel should
display as expected (see section 2.2 LED Indicators).
NOTE: If pressed down for more than 20 seconds, the WR-6891u will go into a
firmware update state (CFE boot mode). The firmware can then be
updated using an Internet browser pointed to the default IP address.
USB HOST PORT
Two USB 2.0 host ports support compatible printers. See Appendix G for setup
instructions. Support for other devices may be added in future firmware upgrades.
ETH PORTS
Use 1000-BASE-T RJ-45 cables to connect up to four network devices to a Gigabit
LAN, or 10/100BASE-T RJ-45 cables for slower networks. As these ports are
auto-sensing MDI/X, either straight-through or crossover cable can be used.
ETH WAN PORT
This port has the same features as the LAN ports described above with additional
Ethernet WAN functionality.

9
FRONT PANEL
WPS/WLAN Switch
Press the WPS/WIFI button for 5 seconds to enable the WIFI function (then WIFI led
should light up). Press for another 5 seconds to enable WPS which will allow 5
minutes for WIFI connection. To disable WIFI, press the WPS/WIFI button for 10
seconds and then WLAN led should go off.

10
2.2 LED Indicators
The front panel LED indicators are shown below and explained in the following table.
This information can be used to check the status of the device and its connections.
LED Color Mode Function
POWER
GREEN On The device is powered up.
Off The device is powered down.
RED On
POST (Power On Self Test) failure
or other malfunction. A
malfunction is any error of internal
sequence or state that will prevent
the device from connecting to the
DSLAM or passing customer data.
ETH 1X-4X GREEN
On An Ethernet Link is established.
Off An Ethernet Link is not
established.
Blink Data transmitting or receiving over
LAN.
WiFi GREEN
On The wireless module is ready.
(i.e. installed and enabled).
Off
The wireless module is not ready.
(i.e. either not installed or
disabled).
Blink Data transmitting or receiving over
WLAN.
WPS
enabled
and PC
connected
to WLAN
WPS
disabled
when WPS
configured
WPS
enabled
and PC
connected
to WLAN
WPS
disabled
when WPS
configured
WPS enabled and
PC connected to
WLAN
WPS enabled and PC connected to
WLAN.
WPS disabled when
WPS configured
WPS disabled when WPS
configured.
The router is
searching for WPS
clients or WPS
un-configured.
The router is searching for WPS
clients or WPS un-configured.
USB GREEN
On
No device is connected to the any USB
ports or a device is connected to any
USB port but not active.
Off At least one device is connected to any
USB port and active.
Blink Data TX/RX through at least one of the
USB ports.

11
WAN GREEN
On An Ethernet WAN Link is
established.
Off An Ethernet WAN Link is not
established.
On Data transmitting or receiving over
Ethernet WAN.
INTERNET
GREEN
On
IP connected and no traffic
detected. If an IP or PPPoE
session is dropped due to an idle
timeout, the light will remain
green if an ADSL connection is still
present.
Off
Modem power off, modem in
bridged mode or ADSL connection
not present. In addition, if an IP
or PPPoE session is dropped for
any reason, other than an idle
timeout, the light is turned off.
Blink
IP connected and IP Traffic is
passing thru the device (either
direction)
RED On
Device attempted to become IP
connected and failed (no DHCP
response, no PPPoE response,
PPPoE authentication failed, no IP
address from IPCP, etc.)

12
Chapter 3 Web User Interface
This section describes how to access the device via the web user interface (WUI)
using an Internet browser such as Internet Explorer (version 5.0 and later).
3.1 Default Settings
The factory default settings of this device are summarized below.
• LAN IP address: 192.168.1.1
• LAN subnet mask: 255.255.255.0
• Administrative access (username: root , password: 12345)
• WLAN access: enabled
Technical Note
During power on, the device initializes all settings to default values. It will then
read the configuration profile from the permanent storage section of flash memory.
The default attributes are overwritten when identical attributes with different values
are configured. The configuration profile in permanent storage can be created via
the web user interface or te lnet user interface, or ot her management protocols.
The factory default configuration can be restored either by pushing the reset button
for more than five seconds until the power indicates LED blinking or by clicking the
Restore Default Configuration option in the Restore Settings screen.
3.2 IP Configuration
DHCP MODE
When the WR-6891u powers up, the onboard DHCP server will switch on. Basically,
the DHCP server issues and reserves IP addresses for LAN devices, such as your PC.
To obtain an IP address from the DCHP server, follow the steps provided below.
NOTE: The following procedure assumes you are running Windows XP.
However, the general steps involved are similar for most operating
systems (OS). Check your OS support documentation for further details.
STEP 1: From the Network Connections window, open Local Area Connection (You
may also access this screen by double-clicking the Local Area Connection
icon on your taskbar). Click the Properties button.
STEP 2: Select Internet Protocol (TCP/IP) and click the Properties button.
STEP 3: Select Obtain an IP address automatically as shown below.

13
STEP 4: Click OK to submit these settings.
If you experience difficulty with DHCP mode, you can try static IP mode instead.
STATIC IP MODE
In static IP mode, you assign IP settings to your PC manually.
Follow these steps to configure your PC IP address to use subnet 192.168.1.x.
NOTE: The following procedure assumes you are running Windows XP.
However, the general steps involved are similar for most operating
systems (OS). Check your OS support documentation for further
details.
STEP 1: From the Network Connections window, open Local Area Connection (You
may also access this screen by double-clicking the Local Area Connection
icon on your taskbar). Click the Properties button.
STEP 2: Select Internet Protocol (TCP/IP) and click the Properties button.
STEP 3: Change the IP address to the 192.168.1.x (2<x<255) subnet with subnet
mask of 255.255.255.0. The screen should now display as shown below.

14
STEP 4: Click OK to submit these settings.

15
3.3 Login Procedure
Perform the following steps to login to the web user interface.
NOTE: The default settings can be found in Section 3.1.
STEP 1: Start the Internet browser and enter the default IP address for the device
in the Web address field. For example, if the default IP address is
192.168.1.1, type http://192.168.1.1.
NOTE: For local administration (i.e. LAN access), the PC running the browser
must be attached to the Ethernet, and not necessarily to the device.
For remote access (i.e. WAN), use the IP address shown on the Device
Information screen and login with remote username and password.
STEP 2: A dialog box will appear, such as the one below. Enter the default
username and password, as defined in 3.1 Default Settings.
Click OK to continue.
NOTE: The login password can be changed later (see 8.6.1 Passwords)
STEP 3: After successfully logging in for the first time, you will reach this screen.

16
You can also reach this page by clicking on the following icon located at the top of
the screen.

17
Chapter 4 Device Information
You can reach this page by clicking on the following icon located at the top of the
screen.
The web user interface window is divided into two frames, the main menu (at left)
and the display screen (on the right). The main menu has several options and
selecting each of these options opens a submenu with more selections.
NOTE: The menu items shown are based upon the configured connection(s) and
user account privileges. For example, if NAT and Firewall are enabled, the
main menu will display the NAT and Security submenus. If either is
disabled, their corresponding menu(s) will also be disabled.
Device Info is the first selection on the main menu so it will be discussed first.
Subsequent chapters will introduce the other main menu options in sequence.
The Device Info Summary screen displays at startup.
This screen shows hardware, software, IP settings and other related information.

18
4.1 WAN
Select WAN from the Device Info submenu to display the configured PVC(s).
Heading Description
Interface Name of the interface for WAN
Description Name of the WAN connection
Type Shows the connection type
VlanMuxId Shows 802.1Q VLAN ID
IPv6 Shows WAN IPv6 status
IGMP Shows Internet Group Management Protocol (IGMP)
status
MLD Shows Multicast Listener Discovery (MLD) status
NAT Shows Network Address Translation (NAT) status
Firewall Shows the status of Firewall
Status Lists the status of DSL link
IPv4 Address Shows WAN IPv4 address
IPv6 Address Shows WAN IPv6 address

19
4.2 Statistics
This selection provides LAN, WAN, ATM and xDSL statistics.
NOTE: These screens are updated automatically every 15 seconds.
Click Reset Statistics to perform a manual update.
4.2.1 LAN Statistics
This screen shows data traffic statistics for each LAN interface.
Heading Description
Interface LAN interface(s)
Received/Transmitted: - Bytes
- Pkts
- Errs
- Drops
Number of Bytes
Number of Packets
Number of packets with errors
Number of dropped packets