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Posted by JBDragon on April 8, 2005, 7:34 pm
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You do you that the MAC address for the Ethernet port and the USB port on
the Motorola SB5100 are different don't you! If you setup with the USB and
then switch over to Ethernet, it's not going to work. Also you don't have
to call Comcast to configure your new modem. You should be able to just
plug it in and use your web browser to go to www.comcast.net which will
bring you to the new user sign up page.(You aren't able to go anywhere
else!!!) Download the software, have your account # for Comcast, look at a
bill you have handy. The software will ask you some questions, find the
current modem that's hooked up and switch the account over to the new Modem.
It's easier then dealing with Comcast. In fact when I called them when I
was upgrading my modem to give them my new MAC address, they told me to do
what I'm suggesting to you or anyone else for that matter.
>
> Okay, Warren, I am so ready to be wowed with wisdom right now, because
> NO ONE seems to be able to help me sufficiently with this problem.
> Here's what I've done since the last post:
>
> - Bought a new Motorola SB5100 and replaced the Scientific Atlanta
> rental from Comcast. Hooked this up with the USB connection, called
> Comcast to give info. on the new modem, connected to the internet just
> fine.
> - Switched the modem connection from USB to ethernet, following all of
> the power off/on routines, of course. Same problem. Obviously not a
> problem with the modem.
> - Spent forever on the phone with Comcast. Was told that adding my new
> router (Linksys Broadband Firewall Router BEFSX41) to the mix may either
> eliminate the problem if it has something to do with a "black list" or
> at list help eliminate possible sources of the problem.
> - Hooked up new router using ethernet connection. It worked! I saw
> the Comcast website with all its images for a couple minutes before I
> went to the Linksys website to complete installation per their
> instructions. They had a drop down where I was to select the "Obtain
> an IP Automatically" option and save settings. Upon save, I lost my
> connection and was not able to get it back.
> - Spent forever on the phone with both Comcast and Linksys. They said
> that something was wrong with my ethernet port hardware, since the
> system could not pull an IP address. I kept questioning, because it
> seemed to me that it pulled an IP address until I saved configuration
> settings on the Linksys website. Both said that they were at the
> limits of their support.
> - Spent time on the phone with Shuttle. Was told that it could be a
> problem with the motherboard and that it would need to be returned.
> I'll wait for my friend to visit again and look at it himself before
> I'm going to let go of my computer.
> - Removed the internal phone modem from the Shuttle and replaced it
> with the ethernet adapter card provided by Comcast. Hooked this up to
> the router, and I am using this connection now to work on the web.
>
> You can talk down to me on this - it wouldn't offend at all. I'm
> really just learning and don't get it all. But it seems to me that if
> I was able to get a connection, however brief, then my original
> ethernet port should be in fine operating condition. It sounds like
> some type of configuration setting is messed up. Now you mentioned
> something about the config only liking one connection at a time, and
> that starting with the USB first may have messed things up, but it
> didn't mess things up for the additional ethernet adapter that I
> installed.
>
> Everyone else has given up on this. Any ideas to offer? Thanks!
>
>
> Your modem has a config file that tells it how many computers can be
> connected to it. If you simply change cables without power-cycling the
> modem, and it is configured to only allow one connection, then if the
> USB
> port was the first one connected, then that's the only one that will
> work.
>
> Some modems, like Motorolas, will allow both the USB and Ethernet ports
> to
> be used at once if the config file allows two or more connections.
> Other
> modems, like RCA's, do not allow both interfaces to be used at once. So
> even
> if you're paying for more than one IP address, you may not be able to
> use
> both interfaces at the same time.
>
> Some RCA modems even resist switching between the two interfaces even
> after
> cold resets. So even if you're only connecting one device at a time,
> and
> you're doing a full, cold reset of the modem, you'll have difficulty
> switching between interfaces.
>
> There also could be a problem if the USB and the Ethernet network
> connections have been bridged by the OS. The Ethernet card may have
> worked
> just fine when it was the only network interface, but once you started
> using
> the USB interface for networking, you may have caused a problem.
>
> Borrowing someone else's modem won't help you troubleshoot. The modem
> you
> use needs to be provisioned for your account. If it's provisioned for
> their
> account, and you're on the same network segment, it might work at your
> house. But if it's provisioned on a different network segment,
> connecting it
> at your house won't work. It may mess-up your friend's account as
> well.
>
> --
> Warren H.
>
> ==========
> Disclaimer: My views reflect those of myself, and not my
> employer, my friends, nor (as she often tells me) my wife.
> Any resemblance to the views of anybody living or dead is
> coincidental. No animals were hurt in the writing of this
> response -- unless you count my dog who desperately wants
> to go outside now.
> Care for your landscape with Black and Decker cordless tools
> http://www.holzemville.com/mall/blackanddecker/index.html
>
>
> --
> Jen
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