[Wlug] ISP/Router/Modem Ethernet communications

[Conner Finlay]

I've got a Linksys WRT54GL which in my opinion is a great router for the
price. I then flashed it with dd-wrt. Here is a list of routers which can
support it.

 http://www.dd-wrt.com/wiki/index.php/Supported_Devices

-Conner
On Dec 1, 2007 6:39 AM, <kstratton at fastmail.us> wrote:

> Thank you everybody for your replies.  I now know that this
> autonegotiation issue can be potentially be a much bigger problem with
> 100 base T than I thought.  Specifically, there is no defined mechanism
> in the spec to autonegotiate for 100 base T cards.  If I actually have
> time for this, I guess I will have to find the spec and read it...
>
> My network driver (windows) is a "NVIDIA nForce MCP Networking
> Controller".  It is an integrated network connector on a HP pavilion.  I
> do not know of a windows equivalent to lspci, so I cannot get the actual
> reported hardware rev.  Maybe I have to get a good live CD distro.
>
> In this case, resetting the cable modem did not fix the problem,
> although it may have fixed it in the past.
>
> My router is a four port Linksys Router about 5 to 8 years old.  My
> modem is a Speedstream 5280.  I am sufficiently annoyed by this problem
> to consider buying a new router if this router has a force 10 base T
> option for the WAN.  I am willing to listen to any suggestions.
>
>
>
> On Fri, 30 Nov 2007 16:29:17 -0500, "John Stoffel" <john at stoffel.org>
> said:
>  >
> > kstratton> I just went through some painful debug session(s) with my
> > kstratton> ISP.  For some reason, after forcing 10 base T half duplex
> > kstratton> through my windows box directly to my modem (I do not
> > kstratton> expect ISPs to support linux),everything suddenly worked
> > kstratton> (after reconnection and re-enabling of course).
> >
> > Can you give more details on the cable modem box you're using and the
> > PC as well?  Such as what network card in the PC you are using?
> >
> > kstratton> How often does this kind of thing happen?  I have seen this
> > kstratton> kind of thing before only once before, and I was using an
> > kstratton> old hub that only supported 10 base T, not a home router
> > kstratton> that is supposed to autodetect the port type.  I remember
> > kstratton> that the modem only supports 10 base T, but I am not 100%
> > kstratton> certain.
> >
> > Sun and Cisco were notirious for having problems figuring our
> > autonegotiation on the Sun hme (Happy Meal Ethernet) cards.  They'd
> > end up 100Full on one side and 100 Half Duplex on the other.  It would
> > work, just very slowly...
> >
> > kstratton> Does anybody have an explanation of what most likely
> > kstratton> happened?  Do not hesitate to skimp on technical details or
> > kstratton> references if is convenient.  I desperately want to
> > kstratton> understand what happened.  --
> >
> > Something didn't autonegotiate properly.  Did you try powering off
> > both devices and then powering them on starting with the cable box?
> >
> > Also, alot of Cable Companies lock the cable box to the first MAC
> > (ethernet hardware address) they see coming over the link.  So if you
> > boot up with a PC, and then try to move to something else like a NAT
> > box or a linux box acting as a NAT box, things can go wonky.
> >
> > Usually a hard reset of the Cablemodem will do the trick, but
> > sometimes you need to contact the ISP and ask them to reset it for
> > you.
> >
> > In your case, it really sounds like a problem with Autonegotiation.
> > Some devices just don't do a good job, esp older equipment from before
> > the Gigabit ethernet stage.
> >
> > Just to expand on Frank's email, the people who designed the Gigiabit
> > Ethernet standard over Copper (802.xxx I can't remember) saw all the
> > problems with the 100/10 devices and autonegotiation and explicity
> > made AutoNeg part of the spec in a very well detailed way, so that
> > these problems won't happen again.  As a matter of fact, Gigabit ports
> > are much smarter and don't require crossover cables either, you can
> > just plug them into back to back, they figure out what's going on
> > automatically and adjust.
> >
> > The joys of big ASICs!
> >
> > John
> > _______________________________________________
> > Wlug mailing list
> > Wlug at mail.wlug.org
> > http://mail.wlug.org/mailman/listinfo/wlug
> --
>
>  kstratton at fastmail.us
>
> _______________________________________________
> Wlug mailing list
> Wlug at mail.wlug.org
> http://mail.wlug.org/mailman/listinfo/wlug
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mail.wlug.org/pipermail/wlug/attachments/20071201/b3bafc1a/attachment.html