[Okta Webinar] Learn how to a build a cloud-first strategyRegister Now


DSL Router/Modem Connection

Posted on 2011-10-03
Medium Priority
Last Modified: 2013-12-14
I have a cisco x2000 modem/router that I need to connect to an AT&T DSL line for internet service. I have a static public IP Address for the WAN connection.

I'm trying to configure the unit but I don't know what to select for Internet Connection Type. I have the following choices: Bridge Mode Only,RFC 2684 Bridged,RFC 2684 Routed, IP0A, RFC 2616 PPPoE, and RFC 2364 PPPoA.

Also don't know about the following:
Muliplexing: LLC  or  VC
AutoDetect: Enable  or  Disable
DSL Modulation Mode: Mixed, etc,etc.

PPPoE Settings: Connect on Demand  or  Keep Alive Redial Period in Seconds

Question by:xpressaccounts
LVL 17

Accepted Solution

bigeven2002 earned 1600 total points
ID: 36907919

Since you have a static IP address, you should be able to choose the RFC 2864 routed mode.  The other mode that will work is the PPPoE which requires you to enter your DSL account username and password.  If you choose PPPoE, then use Keep Alive for 180 seconds.

If selecting Routed mode,  enter the static IP, subnet, gateway, and DNS.  Your DSL ISP should have provided these to you.  The other settings (multiplex, modulation) probably don't matter so leave those at their defaults.

If those don't work, try setting Internet Setup to Ethernet mode and the connection type to Static IP and enter the information given to you by your ISP.

Once you have it up and running and your security setting active, go to this link to do a penetration test:


Assisted Solution

d33m earned 400 total points
ID: 36908712
As i found for AT&T DSL connection you have to set modem's parameters as follows:

For router mode with static IP
- for Internet Connection Type: RFC 2684 Routed
- Muliplexing: LLC  
- AutoDetect: Enable
- DSL Modulation Mode: Mixed

For IP settings you can choose DHCP or Mannual enter for IP settings (U can check right option with AT&T tech. support)

Also, if you have options VPI/VCI in ADSL configuration, for AT&T set them as follows
*VPI: 0

And at the last, you can always ask for right option to set AT&T tech support, because from my experience - good techician always knows right settings for your connection on any kind of hardware.

Featured Post


Modern healthcare requires a modern cloud. View this brief video to understand how the Concerto Cloud for Healthcare can help your organization.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

In the hope of saving someone else's sanity... About a year ago we bought a Cisco 1921 router with two ADSL/VDSL EHWIC cards to load balance local network traffic over the two broadband lines we have, but we couldn't get the routing to work consi…
Quality of Service (QoS) options are nearly endless when it comes to networks today. This article is merely one example of how it can be handled in a hub-n-spoke design using a 3-tier configuration.
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…
After creating this article (http://www.experts-exchange.com/articles/23699/Setup-Mikrotik-routers-with-OSPF.html), I decided to make a video (no audio) to show you how to configure the routers and run some trace routes and pings between the 7 sites…

873 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question