archives: whaky LAN problem

---------- Forwarded Message ----------
Subject: RE: [Nolug] whaky LAN problem
Date: Wed, 5 Dec 2001 20:12:34 -0800 (PST)
From: Ron Johnson <ronjohnsonjr@yahoo.com>
To: nolug@patientcarerx.com

--- "Tran, Chuck" <Chuck_Tran@enron.net> wrote:
> Right, my HUB should have worked also but it didn't. Try plugging
> in
> other 10/100 NICs into that particular port and see what happens.

I did. The original mail has gotten mangled my now from wrap-
arounds, so, from my original email:
<QUOTE>
BUT, if I plug F/W NIC-1 into a known-good-port in the 8-port
hub, the light in the back of the NIC flashes very rapidly
</QUOTE>

It is a known-good-port on the 8-port hub because another box is
plugged into the port, and with that NIC/port combination,
everything is ok.

> Chuck
>
> -----Original Message-----
> From: Scott Harney
> Sent: Wed 12/5/2001 12:42 PM
> To: nolug@patientcarerx.com
> Cc:
> Subject: Re: [Nolug] whaky LAN problem
>
>
>
> should is the operative word. I've seen auto-sensing not act
> sensibly
> before. Remember with switches that you're adding duplex into
> the equation now.
>
> don't forget to check the duplex settings on your boxes. When
> you insert
> the drivers into the kernel for most NICs it's usually
> autosensing, but
> yours may not be. easiest way to check is to unplug your
> network cable then
> plug it back in. Syslog should log an entry describing how the
> NIC negotiates.
>
> On Wed, Dec 05, 2001 at 10:38:25AM -0800, Ron Johnson wrote:
> > The NIC is 10/100, and the 8-port hub is 10/100 auto-sensing,
>
> so
>
> > even if the 5-port hub is only 10Mbps, things sould still
>
> work.
>
> > Last night, just in case, I ordered a 5- and 16-port
>
> auto-sensing
>
> > switches from TigerDirect...
> >
> > --- Chuck <ohchucki@bellsouth.net> wrote:
> > > Is there a change in speeds when you change NICs/HUBs? Which
>
> of the
>
> > > NICs
> > > and which HUBs are 10Mbps, 100 Mbps, or 10/100 auto-sensing?
> > >
> > > The reason I ask is because I had a similar problem once. I
>
> had an
>
> > > 10/100 auto-sensing HUB that worked just dandy but just
>
> decided to
>
> > > retire one day. After trying many different factory made
>
> cables,
>
> > > making
> > > my own cables, changing NICs in and out, I finally
>
> discovered that
>
> > > it
> > > just wouldn't work with 100MBps connections any longer, but
>
> worked
>
> > > with
> > > 10Mbps connections just fine.
> > >
> > > --------
> > > Chuck
> > >
> > >
> > > P.S. - Would it happen to be a D-Link HUB?
> > >
> > > -----Original Message-----
> > > From: owner-nolug@patientcarerx.com
> > > [mailto:owner-nolug@patientcarerx.com] On Behalf Of Ron
>
> Johnson
>
> > > Sent: Wednesday, December 05, 2001 10:12 AM
> > > To: nolug@nolug.org
> > > Subject: [Nolug] whaky LAN problem
> > >
> > >
> > > Hi, all.
> > >
> > > After the power flickered at my house the other night,
>
> something
>
> > > strange is happening.
> > >
> > > Background: I have 2 hubs, a 5-port and an 8-port. The
>
> cable
>
> > > modem, my "work PC" and the firewall's NIC-1 are plugged
>
> into
>
> > > the 5-port hub. (It's because of VPN issues that the
>
> work-PC
>
> > > isn't behind the firewall.) The firewall's NIC-2 is plugged
> > > into the 8-port hub, along with the rest of the LAN.
> > >
> > > In order to debug-by-simplifying, I pulled NIC-2 out of the
>
> F/W.
>
> > > Now, if I plug F/W NIC-1 into the 5-port hub, everything
>
> works
>
> > > fine: I can go out to the internet. BUT, if I plug F/W
>
> NIC-1
>
> > > into a known-good-port in the 8-port hub, the light in the
>
> back
>
> > > of the NIC flashes very rapidly, and the light in the hub
>
> corres-
>
> > > ponding to the known-good-port flashes yellow.
> > >
> > > Of course, between plugging it into the 5-port hub and
>
> 8-port
>
> > > hub, I reconfigure ifcfg-eth0 to give it the correct IP
>
> address,
>
> > > netmask, etc.
> > >
> > > Anyone have a clue as to what the problem is? My wife is
>
> getting
>
> > > *VERY* aggrivated!!
> > >
> > > Thanks,
> > > Ron
> > >
> > > =====
> > > +---------------------------------------------------------+
> > >
> > > | Ron Johnson, Jr. ron.l.johnson@home.com |
> > > | Lockheed Martin IMS ronald.l.johnson@lmco.com |
> > > | WWW Mail ronjohnsonjr@yahoo.com |
> > > | Overused words: community, feel, fun |
> > > | Underused word: think |
> > >
> > > +---------------------------------------------------------+
> > >
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> >
> > =====
> > +---------------------------------------------------------+
> >
> > | Ron Johnson, Jr. ron.l.johnson@home.com |
> > | Lockheed Martin IMS ronald.l.johnson@lmco.com |
> > | WWW Mail ronjohnsonjr@yahoo.com |
> > | Overused words: community, feel, fun |
> > | Underused word: think |
> >
> > +---------------------------------------------------------+
> >
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>
> --
> Scott Harney<scotth@scottharney.com>
> PGP Key fingerprint = 6D 31 C3 00 77 8C D1 C2 59 0A 01 E3 AF 81
> 94 63
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=====
+---------------------------------------------------------+

| Ron Johnson, Jr. ron.l.johnson@home.com |
| Lockheed Martin IMS ronald.l.johnson@lmco.com |
| WWW Mail ronjohnsonjr@yahoo.com |
| Overused words: community, feel, fun |
| Underused word: think |

+---------------------------------------------------------+

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