Troubleshooting guide

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Contents | Ubee Interactive 2011

TABLE OF CONTENTS

Revision History ...................................................................................................................................................................................... 3

Key Reference Documents ................................................................................................................................................................... 6

1 Device Overview ........................................................................................................................................................................... 8

1.1 Physical Specifications, Standards, Firmware Operations ................................................................................................. 8

1.2 DDW3611 LED Operational Summary ...................................................................................................................... 10

2 Login Access .................................................................................................................................................................................. 11

2.1: Login - Web UI and Telnet CLI ........................................................................................................................................... 11

2.2 Management Access Defaults ..................................................................................... Error! Bookmark not defined.

3. Wireless Configuration ................................................................................................................................................................... 12

3.1 Easy Wireless Configuration: ................................................................................................................................................. 12

3.2 Relevant Terms: ......................................................................................................................................................................... 12

3.3 WIRELESS  Primary Network ................................................................................................................................... 13

3.4 WIRELESS  Wireless Radio ................................................................................................................................................ 14

4. Wireless Performance Improvements ........................................................................................................................................ 15

4.1: Wireless Performance Improvements ............................................................................................................................... 15

4.1.1 2.4GHz Channels and Frequencies ......................................................................................................................... 16

4.1.2 5GHz Channels and Frequencies ............................................................................................................................. 17

4.1.3 Signal Attenuation – Receive Signal Strength Indicator (RSSI) ......................................................................... 18

4.1.4 Spatial Steams and Speeds ......................................................................................................................................... 20

5 FIREWALL Troubleshooting Tips ........................................................................................................................................... 21

5.1: Adding a DMZ Host ............................................................................................................................................................... 21

5.2: Can’t I PING the WAN Public IP of the Gateway ......................................................................................................... 21

6 CONNECTIVITY Troubleshooting Tips ..................................................................................................................................... 22

6.1 LEDs are OFF when cable modem is powered on. ................................................................................................. 22

6.2 LED for Ethernet port 1, 2, 3, or 4 on the cable modem is not lit. .................................................................... 22

6.3 General Connectivity Issues: ......................................................................................................................................... 22

6.4 My Ethernet device won’t connect to the network. ............................................................................................... 23

Appendix A – Key Web UI Troubleshooting Screens ................................................................................................................ 24

A.1 MODEM  Cable Modem: Information .................................................................................................................... 24

A.2 MODEM  Cable Modem: Status ............................................................................................................................... 25

A.3 MODEM  Cable Modem: Downstream .................................................................................................................. 26

A.4 MODEM  Cable Modem: Upstream ........................................................................................................................ 27