Comcast and MAC addresses?

Comcast and MAC addresses?
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Subject Author Date
Comcast and MAC addresses? Edward 11-03-2006
Posted by DLR on November 3, 2006, 3:28 pm
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Edward wrote:
> Bit Twister wrote:
>> On 3 Nov 2006 04:26:22 -0800, Edward wrote:
>>
>>> Its just luck that I strill have this board with this particular NIC in
>>> it. If I didn't have it anymore I would be shit outa luck.
>> I would assume you could get to a command line prompt, have your dhcp
>> client release your DHCP lease, Power down equipment long enough to have the
>> cable modem loose all it's settings, power up with new nic.
>>
>> It might be different in PA, but here in Texas, I moved ethernet cable
>> to new nic and after powerup, I got a new Comcast ip address. Power
>> down, swap cable back to original nic, powerup gets old ip address.
>
> Yeah, I realize that's how its supposed to work; but for whatever
> reason it didn't with me.
> I powered everything down, took a crap, mase a sandwich and powered it
> all back on - no IP.
>
While I've been told here it shouldn't work this way, I've had to power
cable modems off from 10 to 30 minutes at times to get them to "forget"
a MAC address. I'm guessing they store this setting back at a head end
or maybe back at an op center and poll the modems every so often and
don't forget all stored MAC settings unless this poll notices the modem
is off.


Pure Networks
Posted by Bill M. on November 3, 2006, 5:50 pm
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wrote:

>
>Bit Twister wrote:
>> On 3 Nov 2006 04:26:22 -0800, Edward wrote:
>>
>> > Its just luck that I strill have this board with this particular NIC in
>> > it. If I didn't have it anymore I would be shit outa luck.
>>
>> I would assume you could get to a command line prompt, have your dhcp
>> client release your DHCP lease, Power down equipment long enough to have the
>> cable modem loose all it's settings, power up with new nic.
>>
>> It might be different in PA, but here in Texas, I moved ethernet cable
>> to new nic and after powerup, I got a new Comcast ip address. Power
>> down, swap cable back to original nic, powerup gets old ip address.
>
>Yeah, I realize that's how its supposed to work; but for whatever
>reason it didn't with me.
>I powered everything down, took a crap, mase a sandwich and powered it
>all back on - no IP.

Does your modem have a battery backup (internal?) that prevents it
from powering down when you pull the plug? Does it have a Reset button
the back?


Posted by Edward on November 3, 2006, 11:24 pm
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Bill M. wrote:
> wrote:
>
> >
> >Bit Twister wrote:
> >> On 3 Nov 2006 04:26:22 -0800, Edward wrote:
> >>
> >> > Its just luck that I strill have this board with this particular NIC in
> >> > it. If I didn't have it anymore I would be shit outa luck.
> >>
> >> I would assume you could get to a command line prompt, have your dhcp
> >> client release your DHCP lease, Power down equipment long enough to have the
> >> cable modem loose all it's settings, power up with new nic.
> >>
> >> It might be different in PA, but here in Texas, I moved ethernet cable
> >> to new nic and after powerup, I got a new Comcast ip address. Power
> >> down, swap cable back to original nic, powerup gets old ip address.
> >
> >Yeah, I realize that's how its supposed to work; but for whatever
> >reason it didn't with me.
> >I powered everything down, took a crap, mase a sandwich and powered it
> >all back on - no IP.
>
> Does your modem have a battery backup (internal?) that prevents it
> from powering down when you pull the plug? Does it have a Reset button
> the back?

It does have a reset button on the back.
I am not aware of any battery, its a Linksys.


Posted by Edward on November 4, 2006, 12:09 am
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Bill M. wrote:
> wrote:
>
> >
> >Bit Twister wrote:
> >> On 3 Nov 2006 04:26:22 -0800, Edward wrote:
> >>
> >> > Its just luck that I strill have this board with this particular NIC in
> >> > it. If I didn't have it anymore I would be shit outa luck.
> >>
> >> I would assume you could get to a command line prompt, have your dhcp
> >> client release your DHCP lease, Power down equipment long enough to have the
> >> cable modem loose all it's settings, power up with new nic.
> >>
> >> It might be different in PA, but here in Texas, I moved ethernet cable
> >> to new nic and after powerup, I got a new Comcast ip address. Power
> >> down, swap cable back to original nic, powerup gets old ip address.
> >
> >Yeah, I realize that's how its supposed to work; but for whatever
> >reason it didn't with me.
> >I powered everything down, took a crap, mase a sandwich and powered it
> >all back on - no IP.
>
> Does your modem have a battery backup (internal?) that prevents it
> from powering down when you pull the plug? Does it have a Reset button
> the back?

Of course now I have another problem... I loose my IP after a few
minutes - this just started.
Maybe its just a fluke.


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