Problem w/ Linksys BEFW11S4 - Wireless Broadband Router (v4)behind a Comcast Cable Modem

I just moved into Comcast territory. Got their Cable internet service which
included a Scientifc Atlantic DPX2100 Modem. I can connect OK, but when I
add the Linksys router the connection fails. What must I do to correct?
Keith

<(E-Mail Removed)> wrote in news:BD0F34C9.12F%(E-Mail Removed):

> I just moved into Comcast territory. Got their Cable internet service
> which included a Scientifc Atlantic DPX2100 Modem. I can connect OK,
> but when I add the Linksys router the connection fails. What must I do
> to correct? Keith
>
>
>

In most cases, the first device's MAC behind the modem must be
provisioned with the ISP. That device being the MAC of the NIC in the
computer that was provisioned with the ISP that can access the IPS's
network or the MAC of the router was provisioned with the ISP as the
device that can access the ISP's network.

If you have not provisioned the router's MAC with the ISP, then that
could be your problem. However, the Linksys router has a MAC Cloning
feature that allows you to take the NIC MAC of the computer that can
access the ISP's network and clone/enter the MAC into the router so that
the router on its WAN port presents the cloned MAC to the ISP. The ISP
will not know the difference.

HTH

Duane

(E-Mail Removed) wrote:

> I just moved into Comcast territory. Got their Cable internet service
> which included a Scientifc Atlantic DPX2100 Modem. I can connect OK,
> but when I add the Linksys router the connection fails. What must I do
> to correct? Keith

Don't know anything about your setup/service, but... with my (different
modem, same router) setup the modem worked and router didn't. Found the
modem had ip of 192.168.1.1 and the router had the same ip. Changed
router to 192.168.2.1 and all was well.
--
Robert - slackware

(E-Mail Removed) wrote:
> I just moved into Comcast territory. Got their Cable internet service which
> included a Scientifc Atlantic DPX2100 Modem. I can connect OK, but when I
> add the Linksys router the connection fails. What must I do to correct?
> Keith
>
>
What do you mean by fails? Intermittent or no internet connectivity at
all? Did you configure the router?

On Mon, 05 Jul 2004 21:21:45 GMT, Duane Arnold <(E-Mail Removed)>
wrote:

>In most cases, the first device's MAC behind the modem must be
>provisioned with the ISP.

Charter does MAC address authentication. Comcast (to the best of my
knowledge) does not do MAC address authentication. I couldn't find
anything that specifically declares that this is true, but the total
lack of any mention of MAC address changes in the connection FAQ at:
http://faq.comcast.net/faq/query.jsp?name=Connection
implies that it's not an issue.

However, the Comcast (CMTS) routers do store the visible MAC address
in their ARP cache. It takes a while to flush this cache when
juggling equipment. Therefore, I suggest that one pulls the plug on
both the cable modem and router, do something useful for about 30
minutes, and then plug it back in. The ARP cache should be flushed by
then and hopefully things will work.

Linksys knowledge base article on Comcast setup:

http://linksys.custhelp.com/cgi-bin/...hp?p_faqid=199
Oh swell. The article says to clone the MAC address. I've never had
to do that and I dunno why it's in there.

--
Jeff Liebermann (E-Mail Removed)
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 AE6KS 831-336-2558