news:1166452838.750692.117890@73g2000cwn.googlegroups.com:

> Trying to get a friend's PC working with Comcast high speed
> internet at home via cable modem.  Having some strange software
> issue with the PC.
>
> I installed a known, working NetGear NIC and related drivers in
> the Gateway PC that is running Windows XP SP1. (I had to install
> this NIC because the onboard Intel NIC with latest drivers was
> "flapping" - would continuously go between "enabled" and
> "disconnected" states).
>
> Windows shows the status of the NetGear LAN Connection as
> "Enabled" and the link light LED is green and showing activity.
> However, the NIC statistics show that packets are being
> transmitted but "0" packets are being received.  I had Ethereal
> running on the PC and it shows the DHCP Discover packets being
> transmitted (reflected in statistics) and other DHCP broadcasts
> for other MAC addresses.
>
> I plugged 2 other PCs into the cable modem and both obtained IP
> addresses right away.  Therefore I know that Comcast service is
> working properly and providing addresses via DHCP.
>
> I know this is strange but my guess is that there is some software
> that is installed on the PC that is preventing packets from being
> received by the NIC.  I tried uninstalling AOL, Norton AV, and Spy
> Sweeper software and still saw the problem.  I also tried
> enabling/disabling the windows firewall.
>
> At this point I've run out of ideas and asking for help from
> anyone out there that has seen this problem before or may have
> other ideas.
>
> Thanks,
> Z
>
>

> zev***@yahoo.com wrote in
> news:1166452838.750692.117890@73g2000cwn.googlegroups.com:
>
> > Trying to get a friend's PC working with Comcast high speed
> > internet at home via cable modem.  Having some strange software
> > issue with the PC.
> >
> > I installed a known, working NetGear NIC and related drivers in
> > the Gateway PC that is running Windows XP SP1. (I had to install
> > this NIC because the onboard Intel NIC with latest drivers was
> > "flapping" - would continuously go between "enabled" and
> > "disconnected" states).
> >
> > Windows shows the status of the NetGear LAN Connection as
> > "Enabled" and the link light LED is green and showing activity.
> > However, the NIC statistics show that packets are being
> > transmitted but "0" packets are being received.  I had Ethereal
> > running on the PC and it shows the DHCP Discover packets being
> > transmitted (reflected in statistics) and other DHCP broadcasts
> > for other MAC addresses.
> >
> > I plugged 2 other PCs into the cable modem and both obtained IP
> > addresses right away.  Therefore I know that Comcast service is
> > working properly and providing addresses via DHCP.
> >
> > I know this is strange but my guess is that there is some software
> > that is installed on the PC that is preventing packets from being
> > received by the NIC.  I tried uninstalling AOL, Norton AV, and Spy
> > Sweeper software and still saw the problem.  I also tried
> > enabling/disabling the windows firewall.
> >
> > At this point I've run out of ideas and asking for help from
> > anyone out there that has seen this problem before or may have
> > other ideas.
> >
> > Thanks,
> > Z
> >
> >
>
> When you plugged the other computers into the cable modem, did you
> use the same cable?  This sounds like it might be a bad cable.
>
> -- John

> John Wunderlich wrote:
>> zev***@yahoo.com wrote in
>> news:1166452838.750692.117890@73g2000cwn.googlegroups.com:
>>
>>> Trying to get a friend's PC working with Comcast high speed
>>> internet at home via cable modem.  Having some strange software
>>> issue with the PC.
>>>
>>> I installed a known, working NetGear NIC and related drivers in
>>> the Gateway PC that is running Windows XP SP1. (I had to install
>>> this NIC because the onboard Intel NIC with latest drivers was
>>> "flapping" - would continuously go between "enabled" and
>>> "disconnected" states).
>>>
>>> Windows shows the status of the NetGear LAN Connection as
>>> "Enabled" and the link light LED is green and showing activity.
>>> However, the NIC statistics show that packets are being
>>> transmitted but "0" packets are being received.  I had Ethereal
>>> running on the PC and it shows the DHCP Discover packets being
>>> transmitted (reflected in statistics) and other DHCP broadcasts
>>> for other MAC addresses.
>>>
>>> I plugged 2 other PCs into the cable modem and both obtained IP
>>> addresses right away.  Therefore I know that Comcast service is
>>> working properly and providing addresses via DHCP.
>>>
>>> I know this is strange but my guess is that there is some
>>> software that is installed on the PC that is preventing packets
>>> from being received by the NIC.  I tried uninstalling AOL,
>>> Norton AV, and Spy Sweeper software and still saw the problem.
>>> I also tried enabling/disabling the windows firewall.
>>>
>>> At this point I've run out of ideas and asking for help from
>>> anyone out there that has seen this problem before or may have
>>> other ideas.
>>>
>>> Thanks, Z

>>
>> When you plugged the other computers into the cable modem, did you
>> use the same cable?  This sounds like it might be a bad cable.
>>
>> -- John

> Yes, I used the same cable.  So I know the cable is good.

> > John Wunderlich wrote:
> >> zev***@yahoo.com wrote in
> >> news:1166452838.750692.117890@73g2000cwn.googlegroups.com:
> >>
> >>> Trying to get a friend's PC working with Comcast high speed
> >>> internet at home via cable modem.  Having some strange software
> >>> issue with the PC.
> >>>
> >>> I installed a known, working NetGear NIC and related drivers in
> >>> the Gateway PC that is running Windows XP SP1. (I had to install
> >>> this NIC because the onboard Intel NIC with latest drivers was
> >>> "flapping" - would continuously go between "enabled" and
> >>> "disconnected" states).
> >>>
> >>> Windows shows the status of the NetGear LAN Connection as
> >>> "Enabled" and the link light LED is green and showing activity.
> >>> However, the NIC statistics show that packets are being
> >>> transmitted but "0" packets are being received.  I had Ethereal
> >>> running on the PC and it shows the DHCP Discover packets being
> >>> transmitted (reflected in statistics) and other DHCP broadcasts
> >>> for other MAC addresses.
> >>>
> >>> I plugged 2 other PCs into the cable modem and both obtained IP
> >>> addresses right away.  Therefore I know that Comcast service is
> >>> working properly and providing addresses via DHCP.
> >>>
> >>> I know this is strange but my guess is that there is some
> >>> software that is installed on the PC that is preventing packets
> >>> from being received by the NIC.  I tried uninstalling AOL,
> >>> Norton AV, and Spy Sweeper software and still saw the problem.
> >>> I also tried enabling/disabling the windows firewall.
> >>>
> >>> At this point I've run out of ideas and asking for help from
> >>> anyone out there that has seen this problem before or may have
> >>> other ideas.
> >>>
> >>> Thanks, Z
>
> >>
> >> When you plugged the other computers into the cable modem, did you
> >> use the same cable?  This sounds like it might be a bad cable.
> >>
> >> -- John
>
> > Yes, I used the same cable.  So I know the cable is good.
>
> At this point, I'm out of clues. As a despiration measure, you might
> try the LSP fix program.  Check out the following website and see if
> this tool might fix your problem...  (couldn't hurt)...
>
> <http://cexx.org/lspfix.htm>
>
> HTH,
>  John

news:1167399660.586275.210970@s34g2000cwa.googlegroups.com:

> Just an update on this issue.  I put a hub in-line between the PC
> and cable modem.  Then using a second PC I was able to use
> Ethereal to take a packet capture.  What I found was that Comcast
> was not sending a DHCP Offer in response to the PC's DHCP
> Discover.  Previously I had assumed that Comcast was sending this
> since my laptop worked when I plugged it in.  Therefore the
> problem was with Comcast's network and not the PC.
>
> Anyways, the solution to the problem was simple.  Comcast remotely
> reset the cable modem and subsequently the DHCP exchange worked
> normally.  Wish I had thought of this previously but I was too
> focused on the PC.  Thanks to John for his help.
>
> Thanks,
> Z