[IMC-Tech] internet access in the basement

[dan blah]

first i should probably do something that needed to be done when i did
this, that is show you a quick/dirty diagram of the current ucimc
network.  internet --> firewall (teco, top floor in old post office
peep space) --> switch in audio/video production room --> rfu studio
patch panel --> switch in btp anter(what do we call this room) room
-->  switch in btp room.  from the switch in the anter/whatever room
there is a line that feeds melody's studio, family room wireless, and
office next to the family room.  the firewall is the dhcp server for
the whole building.  there can be only one dhcp server for the whole
building.  the dhcp address given by the firewall/teco is
192.168.42.100-199.  eventually thers will be the only addresses
allowed to get to the internet.

following are assumptions of what i think happened and caused problems
(only assumptions as i wasnt there :).  the first thing i noticed and
the first thing i think happened is the switch in audio/video
production room was borked.  the feed from the firewall was not
plugged in all the way.  my assumption is that this happened during
the rfu studio redesign when they were moving stuff around (no worries
stuff like that happens all the time).  secondly, i on either the
linksys box in the family room, the linksys box in the anter/whatever
room or the linksys box in the btp room someone turned on a dhcp
server.  i know this because the computers in btp are getting dhcp
replies issuing them 192.168.1.100 addresses (not the same ip scheme
as the main imc firewall).  this will make all the computers in the
whole building think they are supposed to go out this linksys box for
internet.  none of those linksys boxes are plugged directly into the
internet causing the network to fail.

i had at one point turned off dhcp on all those linksys boxes so
someone had to turn it back on.  this is an honest mistake partly my
fault because i didn't tell anyone i did it.  the solution was to turn
off dhcp on the linksys box and disconnect/reconnect the network
cables going to the computers.
On 7/8/06, Jay Schubert <jay.schubert at gmail.com> wrote:
> Tech group,
>
> Does anyone know whether this is the case?  If so, can we get some help?
> We're expecting a number of volunteers to show up in a couple hours to do
> data entry and we're kind of in a bad spot without internet access as our
> system relies on it.
>
> - Jay
>
> ---------- Forwarded message ----------
> From: Wendy Edwards <wedwards at uiuc.edu>
> Date: Jul 8, 2006 11:42 AM
> Subject: Re: [IMC-Tech] internet access in the basement
> To: Jay Schubert <jay.schubert at gmail.com>
>
> Jay, I did stop by, and made my best guesses.  But I didn't have
> much luck, because it looked like the whole network might have
> been down.
>
> Wendy
>
> On Sat, Jul 08, 2006 at 08:07:21AM -0500, Jay Schubert wrote:
> > Wendy,
> >
> > did you have a chance to stop by?  If so, did you have any luck?
> >
> > On 7/7/06, Jay Schubert <jay.schubert at gmail.com> wrote:
> > >
> > >I really appreciate it!
>
> > >
> > >
> > >On 7/7/06, Wendy Edwards < wedwards at uiuc.edu> wrote:
> > >>
> > >> I can probably stop by later tonight and take a look.
> > >>
> > >> Wendy
> > >>
> > >> On Fri, Jul 07, 2006 at 02:29:38PM -0500, Jay Schubert wrote:
> > >> > Tech,
> > >> >
> > >> > Apparently earlier this week, the internet connection was lost in the
> > >> > basement and people were unable to work during the bookstoprisoners
> > >> shift
> > >> > yesterday.  In an apparent attempt to resolve the problem, someone
> > >> again
> > >> > unplugged most of the ethernet cables from the router in our
>  > >> anteroom.  I
> > >> > took a look at it for the first time this morning and was not able to
> > >> get it
> > >> > working.
> > >> >
> > >> > If anyone has a few minutes to spare when they could drop-by and help
> > >> us out
> > >> > so that we're back online for our big work day tomorrow, it would be
> > >> > hugely appreciated.
> > >> > Perhaps if we label the cables coming into the room with which plug
> > >> they
> > >> > belong in on the router, this can be prevented from being an issue in
> > >> the
> > >> > future.   In the btp room, the middle computer has an account called
> > >> "Chris"
> > >> > which is currently not password protected, from which the connection
> > >> can be
> > >> > checked.
> > >> >
> > >> > Again - any help would be really appreciated!
> > >> >
> > >> > --
> > >> > Jay
> > >>
> > >> > _______________________________________________
> > >> > IMC-Tech mailing list
> > >> > IMC-Tech at lists.ucimc.org
> > >> > http://lists.chambana.net/cgi-bin/listinfo/imc-tech
> > >>
> > >>
> > >
> > >
> > >--
> > >Jay
> > >
> >
> >
> >
> > --
> > Jay
>
>
> --
> Jay
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>
>
>


-- 
Daniel