[olug] ping modem

[Christopher White]

Here's another little tidbit that may help.  Try power cycling the
modem without the cable line connected.  This will typically place
most modems into NAT router mode, whereby the modem will begin
assigning IP addresses in the 192.168.x.x range (plug the cable back
in and power cycle to put the modem back into modem mode).  Once in
router mode, the modem's web page will also typically change in the
options you are presented with @ 192.168.100.1.  Keeping the modem
unplugged from the cable line for more than 15 - 20 mins resets Cox's
"hold" on the modem and will force it to reacquire it's connection
settings and tftp image from Cox.  Sometimes, that's all that's
required to repair a faulty connection.

Hope this helps,

Chris from Kearney

On Jan 24, 2008 2:30 AM, Rob Townley <rob.townley at gmail.com> wrote:
> On Jan 23, 2008 11:24 PM, Tim & Alethea Larson <thelarsons3 at cox.net> wrote:
>
> > Luke -Jr wrote:
> > > On Tuesday 22 January 2008, Tim & Alethea Larson wrote:
> > >> I keep losing my connection to the outside world, though my LAN is fine
> > >> and Cox says my modem is fine.  Usually I end up resetting the modem
> > and
> > >> sometimes the routers too.  There's got to be something wrong between
> > >> the modem and the router.  How can I troubleshoot what it might be?
> > >
> > > Try 'mtr'
> >
> > I've not heard of that one.  Would the modem have a LAN IP that I could
> > ping at?  Seems an obvious thing to try.
> >
> >
>
> http://192.168.100.1  i have found to be the standard cable modem web page
> accessible from any PC on the private / inside of the the network whether
> directly connected to the cable modem or through a nat device.  It doesn't
> matter what brand and not just in North America, because i found this to be
> the case when visiting some East Asian countries, India, Turkey, Europe....
>
> The web page has a Logging tab that sometimes will monitor for drastic
> changes to the Signal to Noise Ratio for both upstream and downstream.
> However, the forums will give different answers for what these values should
> be.  Probably because it depends on how much power has been supplied to your
> neighborhood and what the CMTS needs.   Under "Addresses", it will help to
> verify how many ip addresses cox will allow you to have.   Below is from
> behind a business that has 3 IPs.  In older versions, you could tell the
> cm DHCP server to let go of certain MAC addresses which made it much quicker
> to then tell your PC or Nat dhcp client to renew without having to power
> off.  Think of the situation where you need to switch from one PC to
> another.  Further, connecting via both USB and Ethernet WILL cause problems
> because COX will think you are trying to use more than one IP address while
> only paying for one.  Print out your values and the next time the connection
> drops, ask COX the Mac address that is currently connected to your cable
> modem.  If it is not one of your macs, then there could be a typo in
> their mac database.
>
>    # Known CPE MAC Address (Max 3) Status 1 00 14 bf 0f xx yy Dynamic 2 00
> 14 bf 1f xx yy Dynamic 3 00 07 40 b5 xx yy Dynamic
>
> Under the cable modem's "Help" page, this is what i have.  Firmware should
> be updated by COX automatically.
>
> Software Version: SB5120-2.19.0.10-SCM01-NOSH
> Hardware Version: 4
> MIB Version: II
> GUI Version: 1.0
> VxWorks Version: 5.4
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