Re: Ethernet card does not work with FC2
From: Bob Chiodini (chiodr_at_kscems.ksc.nasa.gov)
Date: 07/21/04
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To: For users of Fedora Core releases <fedora-list@redhat.com> Date: Wed, 21 Jul 2004 11:25:10 -0400
On Wed, 2004-07-21 at 10:37, Scot L. Harris wrote:
> On Wed, 2004-07-21 at 10:11, Alberto M R Davila wrote:
> > Hi Scott,
> >
> > I am using the normal network cable (the blue one) to connect my card to
> > the local network... I just unplugged the cable/connector from a computer
> > connedt to internet (working properly of course) use it for my laptop and
> > cloned the accordingly the IP address and DNS, then nothing.. I am
> > attaching the log...
> >
> > What a difficult task.
> >
> > Thanks, Alberto
>
> hmmm, still don't know what type of switch you are connecting to. If
> you used the same IP address as another device that was on the network
> there could a couple of issues even if the other device is off the
> network.
>
> The switches used at your location could be locked down. Some switches
> allow you to specify what MAC address that port on the switch is allowed
> to talk to. If that is the case you will need to get the network
> administrator to setup a port for you on the switch.
>
> The other problem could be that the default gateway probably has the
> other machines MAC address in cache. Until that times out or can be
> flushed your machine will not be able to talk to the gateway. What
> happens is your system arps for the router and gets a reply. You then
> try to send a packet to the MAC address supplied in the arp. The router
> gets your packet and checks its arp cache for the MAC address assigned
> to that IP and sends the reply out to the wrong MAC address.
>
> Again if that is the case you can get the network administrator to flush
> the arp cache or sometimes just try to ping your IP from the router.
> After that it should work.
>
> The other thing you can do is get a different IP address, one that has
> not been used yet on the network.
>
> Also, you may still want to get a cross over cable and try that test I
> suggested. That will tell you for sure if the interface is configured
> correctly.
>
> Also, the other thing I mentioned last time was to verify that you do
> have link to the switch (should have an led on the switch to indicate
> that) and that you are set to the correct speed and duplex settings.
> Those should be autonegotiated but I have seen that fail on Cisco
> switches and Sun servers. You can use mii-tool to specify those
> settings if needed.
>
> I am copying this back to the list as this may provide some others with
> info that may point to a solution for you.
>
> --
> Scot L. Harris
> webid@cfl.rr.com
>
> It seems a little silly now, but this country was founded as a protest
> against taxation.
If you can't ping from the router: This will flush the old ARP cache
entry on some Cisco Routers. I have not tried it on anything else:
ping -q -c 1 -b -I $COMMONIP $NETWORK
Where $COMMONIP is the IP address of the interface to ping from and
$NETWORK is the network address of your subnet.
Bob...
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- Previous message: Francisco Figueiredo Jr.: "Re: Laptop fan never turns off, please help."
- In reply to: Scot L. Harris: "Re: Ethernet card does not work with FC2"
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