[Cialug] OT: Cable Modem troubelshooting

Fri May 1 17:36:50 UTC 2020

I purchased the exact same model. Seems fast enough to me. MediaCom
_should_ be familiar with it because I'm pretty sure that it's the exact
same model that they tried to get me to rent when I signed up.

They may be trying to move DOCSIS 4.0 modems now though. From what I've
read DOCSIS 3.1 modems (and/or the upstream head ends) aren't able to reach
the theoretical 10Gbps speeds that DOCSIS 3.1 is supposed to offer and
generally can only hit around 950Mbps.

On Fri, May 1, 2020 at 12:25 PM David Champion <dchamp1337 at gmail.com> wrote:

> I bought a fairly nice modem since I didn't want it to be instantly
> obsolete, have an Arris SB8200, DOCSIS 3.1 modem with the option of running
> 2 gigabit ethernet ports. Funny that pretty much all of the MC people would
> say it's probably not fast enough for the 1gb internet connection I have, I
> should rent one of their modems, because they aren't familiar with it.
>
> -dc
>
> On Fri, May 1, 2020, 12:19 PM Jeffrey Ollie <jeff at ocjtech.us> wrote:
>
> > It's more than just MediaCom wanting to control the firmware, it's the
> > whole cable internet industry as it's baked into the DOCSIS protocol. On
> > the one hand, if you have an ISP that cares, they can remotely update
> > firmware to fix security issues (like for the recent Cable Haunt
> > vulnerability). Most end-users probably never heard about Cable Haunt and
> > probably wouldn't know how to update the firmware anyway.
> >
> > On the other hand, savvy end users like us lose a measure of control.
> > Especially if we purchased our own modem to save on rental fees and to
> get
> > a better performing device.
> >
> >
> >
> > On Fri, May 1, 2020 at 11:10 AM David Champion <dchamp1337 at gmail.com>
> > wrote:
> >
> > > Being a former ISP employee, I get that MC wants to control the modems,
> > but
> > > a huge nerd I also want to be able to control my network devices.
> > >
> > > They temporarily loaned me one of their combined modem/router/phone
> > > devices, I was like "uh, no". Took it back to them yesterday.
> > >
> > > -dc
> > >
> > >
> > > On Fri, May 1, 2020, 11:05 AM Jared Brees <fromj2sitsme at msn.com>
> wrote:
> > >
> > > > Moost point since it's working now, but side note - you CAN mess with
> > > > firmware, it just (if applicable) either requires soldering headers,
> or
> > > > spinning up your own equipment, similar to what Mediacom has on the
> > other
> > > > end. Even if you do the 2nd option, that firmware is "gone" as soon
> as
> > it
> > > > reboots.
> > > > ________________________________
> > > > From: Cialug <cialug-bounces at cialug.org> on behalf of David
> Champion <
> > > > dchamp1337 at gmail.com>
> > > > Sent: Thursday, April 30, 2020 14:39
> > > > To: Central Iowa Linux Users Group <cialug at cialug.org>
> > > > Subject: Re: [Cialug] OT: Cable Modem troubelshooting
> > > >
> > > > After a couple more tech support calls and some help from Chris (who
> > > > noticed I was getting a private IP address) I was able to get them to
> > > > register my modem properly and now it works again.
> > > >
> > > > -dc
> > > >
> > > >
> > > > On Thu, Apr 30, 2020 at 12:16 PM David Champion <
> dchamp1337 at gmail.com>
> > > > wrote:
> > > >
> > > > > I plugged into the Arris modem and it does give me a dhcp address,
> I
> > > can
> > > > > get into the modem at 192.168.100.1, I can view the software
> version,
> > > and
> > > > > can see the Event Log.
> > > > >
> > > > > I may try doing a reset on the modem with the recessed pinhole and
> > see
> > > if
> > > > > it will work.
> > > > >
> > > > > Thanks,
> > > > >
> > > > > -dc
> > > > >
> > > > >
> > > > > On Thu, Apr 30, 2020 at 11:42 AM Jimmy Lela <
> > binaryvisionary at gmail.com
> > > >
> > > > > wrote:
> > > > >
> > > > >> Dave,
> > > > >>
> > > > >> You're correct about the firmware, Mediacom controls that.  Last I
> > > knew
> > > > I
> > > > >> thought you could still access the modem's admin page and see
> useful
> > > > >> things
> > > > >> like TX power and SNR, but it's been a while, they may have locked
> > > that
> > > > >> down.  Do you get anything if you browse to whatever IP the admin
> > page
> > > > >> should be at, like 192.168.0.1 or similar?  Actually I just tried,
> > and
> > > > my
> > > > >> modem does respond at 192.168.01 but so far any default
> credentials
> > > I've
> > > > >> tried haven't worked.
> > > > >>
> > > > >> I've been renting a modem/router from Mediacom too but it's in
> > bridged
> > > > >> mode.  I've been looking to buy my own and am leaning towards a
> new
> > > > Arris
> > > > >> SB, I've had good success with them.
> > > > >>
> > > > >> On Thu, Apr 30, 2020, 11:24 AM David Champion <
> dchamp1337 at gmail.com
> > >
> > > > >> wrote:
> > > > >>
> > > > >> > Off Topic question:
> > > > >> > I have an Arris SB8200 cable modem on Mediacom, it was working
> > > > perfectly
> > > > >> > fine. Last week I started having flaky internet connection
> issues,
> > > it
> > > > >> got
> > > > >> > to the point where if I power cycle the modem, I could ping out
> to
> > > the
> > > > >> WAN
> > > > >> > gateway IP address for about 15 to 30 seconds, then it would
> stop.
> > > > >> >
> > > > >> > The modem had all 4 of the lights lit up normally, no indication
> > of
> > > > >> > problems.
> > > > >> >
> > > > >> > After bugging the 1st tier tech support guy at MC he finally
> > looked
> > > > hard
> > > > >> > enough to confirm that they could see the connection dropping,
> and
> > > he
> > > > >> > claimed they couldn't see the modem at all any more after that.
> > > > >> >
> > > > >> > Tech came out yesterday, said the modem was bad, they left me a
> > > modem
> > > > /
> > > > >> > router - Ubee 1301 as a loaner and they're charging me $50 for
> the
> > > > >> service
> > > > >> > call. I was able to get into the admin on it and turn off wifi
> and
> > > > >> change
> > > > >> > the LAN IP, seem  to be working.
> > > > >> >
> > > > >> > Question is: is there any troubleshooting I can do on the Arris
> > > modem?
> > > > >> From
> > > > >> > what I understand there's no way I can access it or update
> > firmware,
> > > > or
> > > > >> see
> > > > >> > if the provider pushed a bad firmware to it, I'm fully at their
> > > mercy.
> > > > >> Is
> > > > >> > this correct?
> > > > >> >
> > > > >> > Good thing I still have my old Internetsolver / Aureon DSL as a
> > > > backup.
> > > > >> >
> > > > >> > -dc
> > > > >> > _______________________________________________
> > > > >> > Cialug mailing list
> > > > >> > Cialug at cialug.org
> > > > >> > https://www.cialug.org/cgi-bin/mailman/listinfo/cialug
> > > > >> >
> > > > >> _______________________________________________
> > > > >> Cialug mailing list
> > > > >> Cialug at cialug.org
> > > > >> https://www.cialug.org/cgi-bin/mailman/listinfo/cialug
> > > > >>
> > > > >
> > > > _______________________________________________
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> > >
> >
> >
> > --
> > Jeff Ollie
> > The majestik møøse is one of the mäni interesting furry animals in
> Sweden.
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-- 
Jeff Ollie
The majestik møøse is one of the mäni interesting furry animals in Sweden.