[luau] Road Runner

Wed Mar 27 01:36:49 PST 2002

I tried that the first few days before contacting MPLUG and the list


>From: R Scott Belford <sctinc at mac.com>
>Reply-To: luau at videl.ics.hawaii.edu
>To: luau at videl.ics.hawaii.edu
>Subject: Re: [luau] Road Runner
>Date: Tue, 26 Mar 2002 22:43:11 -1000
>
>The more advanced and thoughtful posts and scripts may have addressed
>this already, but I would agree that what Dean suggests may be.  I have
>definitely learned that I must "reboot" either my dsl or cable modem
>when changing nics or pcs.  Surely this isn't at play, but I too would
>like to know.
>
>scott
>
>
>On Tuesday, March 26, 2002, at 09:47  PM, Dean Fujioka wrote:
>
>>I have a theory.. others may build, please.
>>Try shutting off your Linux box, plugging in the Ethernet cable into the
>>Linux box.
>>Unplug the Cable modem power, plug it back in.
>>turn on the Linux box.
>>try to connect to the internet.
>>
>>I have noticed a strange phenomenon while using RoadRunner.  They
>>somehow
>>track how many computers are connected to the other end of the modem
>>(by MAC
>>address I guess).  They seem to keep a log of this number.
>>For example: If anyone has ever tried to connect two+ computers to road
>>runner via a hub or switch, you will notice that the first computer to
>>connect to the internet is the only computer that connects to the
>>internet,
>>regardless of which computer that is.  Perhaps you are experiencing
>>something similar, in that RoadRunner is seeing 2 MAC addresses,
>>seemingly
>>changing at random (as you switch the Ethernet cable back and forth
>>perhaps
>>while both computers are on) and sees this as two systems trying to
>>connect
>>at the same time, and so denies the second.
>>
>>If that was too long winded or incomprehensible, I apologize, but the
>>test
>>at the top of this post is simple and quick.
>>
>>dean
>>
>>----- Original Message -----
>>From: "Mark Kellman" <mark_kellman at hotmail.com>
>>To: <luau at videl.ics.hawaii.edu>
>>Sent: Monday, March 25, 2002 7:19 PM
>>Subject: Re: [luau] Road Runner
>>
>>
>>>Because I fell soooooooo far behind in my Oracle studies, I decided to
>>wait
>>>until Thursday to bring in my box and start from there.  Everyone has
>>>graciously given me their time and effort, but I believe it would be
>>better
>>>to just sit in front of this damn box and open up the patient.  Thank
>>>you
>>>all again for your insight and patience.  See you Thursday!
>>>
>>>
>>>>From: Jimen Ching <jching at flex.com>
>>>>Reply-To: luau at videl.ics.hawaii.edu
>>>>To: <luau at videl.ics.hawaii.edu>
>>>>Subject: Re: [luau] Road Runner
>>>>Date: Mon, 25 Mar 2002 13:30:33 -1000 (HST)
>>>>
>>>>On Sun, 24 Mar 2002, Ray Strode wrote:
>>>>>That's not a problem.  That's a choice.. He only wants it to give him
>>>>>internet on demand (when he plugs the cable modem into the already
>>>>>running box).
>>>>
>>>>Is this proven to work?  DHCP has some kind of keepalive mechanism.
>>>>If
>>>>you unplug the cable at the wrong moment, the server could drop the
>>>>link
>>>>altogether.  I guess if you re-start the DHCP client on both the
>>>>Windows
>>>>and Linux boxes, then it might work.
>>>>
>>>>>>Second, as Patrick suggested, there might be a hardware problem.
>>>>>No.. It gets an IP address and Gateway.
>>>>
>>>>This does not gaurantee it is not a hardware problem.  I once ran
>>>>into an
>>>>intermittent problem that was a result of a bad cable.  When doing
>>trouble
>>>>shooting, one has to keep an open mind about such things.
>>>>
>>>>>/etc/sysconfig/network-scripts/ifcfg-eth0
>>>>>sets some environment variables that /etc/init.d/network
>>>>>script uses to know what to do.
>>>>
>>>>Editing those scripts seems to have fixed the startup problem at
>>>>bootup.
>>>>Though I should give a warning about doing those 'echo' edits of
>>>>startup
>>>>scripts like this one, even if it is only a data file.
>>>>
>>>>I did this on my Debian system when I first started.  What happened
>>>>was
>>>>that when I upgraded to a new version, the installer detected that I
>>>>changed the files and requested to save the originals.  This would
>>>>mean I
>>>>would have to re-edit all of the changed files, and at this point, I
>>>>have
>>>>no idea which files I changed.  What I ended up doing was to figure
>>>>out
>>>>how Debian was designed to provide the user modifications that I
>>>>wanted.
>>>>Debian has separate files that a user can edit, that extends the
>>>>configuration.  This is the correct way to make modifications, and in
>>>>future upgrades, it *just works*.
>>>>
>>>>So now, I am hesitant when someone asks me to just edit script files
>>>>that
>>>>has a comment at the top of the file that says not to edit.  Since
>>>>Mark
>>>>found a config tool that makes the necessary changes, I think that
>>>>would
>>>>be the safer route.
>>>>
>>>>>>1.  Mark, you need to login as root from your KDE environment to run
>>all
>>>>>>of the commands that everyone is asking you to run.  The reason you
>>got
>>>>>>an error when you typed 'ifconfig' was because you were not root.
>>Ray,
>>>>>>Warren, correct me if I am wrong, but doesn't RedHat include /sbin
>>>>>>in
>>>>the
>>>>>>path when you are logged in as root?
>>>>>It does, but depending on how super user priveleges are gained, the
>>>>>exisiting environment may be inherited, so the path and such may be
>>>>>still set to the previous user.
>>>>
>>>>When I use 'su' to gain superuser privileges, the PATH variable is
>>changed
>>>>completely.  This is what I would expect, since you do not want 'user
>>>>paths' to be in the superuser PATH variable.  The superuser should not
>>>>just run any program from random locations.  So, cleaning out the PATH
>>>>variable is a good thing.
>>>>
>>>>>>Another benefit of using a terminal application instead of
>>>>>>Ctrl-Alt-F7
>>>>is
>>>>>>that you can copy and paste the output of those programs into an
>>editor.
>>>>>>The terminal app usually has a scroll bar, so if the output scrolls
>>off
>>>>>>the window, just move the scroll bar up and copy the text.
>>>>>That's true (except Ctrl-Alt-F7 normally goes back to X, not to a
>>>>console)
>>>>
>>>>I meant Ctrl-Alt-F1.  My point was, it doesn't matter.  There is no
>>>>need
>>>>to use it, no matter which key it was.
>>>>
>>>>--jc
>>>>--
>>>>Jimen Ching (WH6BRR)      jching at flex.com     wh6brr at uhm.ampr.org
>>>>
>>>>_______________________________________________
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>>>>LUAU at videl.ics.hawaii.edu
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>>>
>>>
>>>
>>>
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>>
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