[PLUG] Limited Internet connectivity on Comcast

[Bill Barry]

On Mon, Aug 25, 2014 at 3:04 PM, <dick at dicksteffens.com> wrote:

> For the past few weeks we've been experiencing our Internet connection
> (Comcast) going away and returning. I got worse so I called their tech
> support. The first tier decided that they could see the modem sometimes
> but would lose it, too, and concluded that I needed a new modem. So this
> morning I drove over to the Comcast store in Milwaukie and got a new
> one. I plugged it in but the router would not see it.
>
> I tried my connecting my laptop running Linux Mint directly to the modem
> but no joy. I tried my wife's laptop running Win7 and got connected.
>
>
Over the course of the morning I spoke with three guys from the Portland
> support group. During some of those discussions I was able to connect
> with my wife's laptop, but not always. I tried moving the modem to a
> different cable down at the box on the side of the house (the demark in
> telephone terms). That always worked for the Win7 laptop but never
> worked for my Linux laptop. That was with the last fellow I spoke with.
> He admitted to not being familiar with Linux, but did understand that I
> could run a program like the Windows ipconfig on my Linux box. When I do
> that (run ifconfig) I can see an IP6 address but not an IP4 address.
> When I run ipconfig on the Windows laptop I see both an IP4 and an IP6
> address.
>
>

Did you try resetting the modem before connecting your laptop or the router?

http://customer.comcast.com/help-and-support/internet/power-cycling-your-modem/

Bill