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getitnow1234's profile



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Sunday, December 16th, 2018 8:06 PM

Problem failing over from Comcast to ATT using Dual WAN Router - Xfinity Router / BGW210 / LRT224

I am trying to setup my dual WAN Linksys LRT224 router so that I have comcast (standard comcast cable modem) as my main WAN connection and AT&T ( BGW210) as my failover backup WAN connection.  The problem I am having is when I try to simulate a failover situation by unplugging the comcast cable.  I see that the LRT224 is trying to failover and connect to the BGW210 because I can see in the system status that it obtains an ip address from ATT.  But then I can't access the internet anymore.  I already followed the instructions for changing the BGW210 into passthrough mode and using the DHCP-fixed option to connect directly to the LRT224 port's mac address.  If I plug comcast back in and pull out ATT, the LRT224 fails back, but the internet connection still doesn't come back up.  The weird thing is if I renew the ip address on any of the client computers on the internal network, either after the initial failover or after failing back to comcast, then that machine can access the internet.  Obviously this is not an elegant solution and it doesn't make sense to me why that works.  The frustrating thing is I already have this setup working fine at another site hooking up Comcast and Birch Communications through an LRT224 so I thought it would be a similar setup with ATT.  Any help on this would be greatly appreciated!

Community Support


232.9K Messages

6 years ago

Hello @getitnow1234, thanks for contacting us with your question.

In order to better assist you with your inquiry/configuration, please call our paid ConnecTech service at 1-866-294-3464.


Mihai AT&T Community Specialist

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