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SBG6580-2: Bridge Mode Setup

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Question
What should I know about enabling / disabling bridge mode in the SBG6580-2? 
Answer
By default, the SBG6580-2 operates as a gateway, and provides Internet access for multiple devices (up to 245 devices), connecting to the SBG6580-2.  The SBG6580-2 serves as a modem and a router and keeps the devices in the Local Area Network (LAN) hidden.  In certain situations, it may be desired to disable the router function of the SBG6580-2, and have it operate as a modem only.  This can be accomplished by configuring the SBG6580-2 for Bridge Mode.  When Bridge Mode is enabled, the router function is turned off and the device directly connected to the SBG6580-2 will receive the Public IP address from the Cable Provider.  This document describes how to enable and disable Bridge Mode. 

This document contains the following sections:

NOTE: Although the SBG6580-2 does not route traffic when Bridge Mode is enabled, it can still act as a firewall if the firewall settings in the SBG6580-2 are enabled.

This is an ideal setup when:
  • Adding a firewall, router or another NAT device to manage the Local Area Network
  • Hosting services or applications that can benefit from being directly accessible from the Internet


To Enable Bridge Mode
  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari.  Enter http://192.168.0.1 into the address box, and press the Enter key.  The Login page will appear.
     
  2. On the Login page, enter admin in the Username field.
     
  3. Enter password in the Password field.
     
  4. Click the Login button.  The Home page will appear.

    User-added image

     
  5. Move the mouse-cursor over Basic on the main menu, and click the Setup link on the sub-menu.  The Basic - Setup page will appear. 

    User-added image

     
  6. On the Basic - Setup page, click the Gateway Mode drop-down menu, and select Bridged.
     
  7. Click the Apply button.

    User-added image

     
  8. Next, the following message will appear (below).  Allow 3 minutes for the settings to take effect.

    User-added image

     
  9. The SBG6580-2 has now been configured for bridge mode.  Make sure that the device is able to receive a public IP address and directly connected to the SBG6580-2's Ethernet ports.


To Disable Bridge Mode
  1. Launch a web browser, such as Internet Explorer, Firefox, or Safari. Enter http://192.168.100.1 into the address box, and press the Enter key.  The Login page will appear.
     
  2. On the Login page, enter admin in the Username field.
     
  3. Enter password in the Password field.
     
  4. Click the Login button.  The Home page will appear.

    User-added image

     
  5. Move the mouse-cursor over Basic on the main menu, and click the Setup link on the sub-menu.  The Basic - Setup page will appear. 

    User-added image

     
  6. On the Basic - Setup page, click the Gateway Mode drop-down menu, and select Routed.
     
  7. Click the Apply button.

    User-added image

     
  8. Next, the following message will appear (below).  After waiting 3 minutes, click the RELOAD link to go back to the Login page.

    User-added image

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