> From: Craig White <craigwhite@azapple.com>
> To: plug-discuss@lists.plug.phoenix.az.us
> Date: Sat, 19 Feb 2005 07:55:38 -0700
> Reply-To: plug-discuss@lists.plug.phoenix.az.us
>
> On Sat, 2005-02-19 at 06:36 -0700, G Gambill wrote:
> > Got a RH 8.0 box serving (SAMBA) date with two NICs (192.168.xxx.30 and
> > 192.168.xxx.31). Eth0 is onboard while eth1 is added.
> >
> > >From a Win XP box I can ping both NICs (192.168.xxx.30 and
> 192.168.xxx.31)
> > with only the eth0 cable plugged in. 8-(
> >
> > >From a Win XP box I can NOT ping either NICs (192.168.xxx.30 and
> > 192.168.xxx.31) with only the eth1 cable plugged in. 8-(
> >
> > >From the RH 8 box I can ping the XP box (192.168.xxx.10) with
> only the eth0
> > cable plugged in, but can NOT with only the eth1 cable plugged in. 8-(
> >
> > Obviously eth1 is not cooperating. But, Why does XP
> successfully ping the
> > eth1 ip address (192.168.xxx.31) with the eth1 cable unplugged?
> >
> > /etc/sysconfig/network-scripts/ifcfg-eth0 and
> > /etc/sysconfig/network-scripts/ifcfg-eth1 both look good per
> the ifconfig
> > command. But then doesn't ifconfig get it's info from ifcfg-ethx?
> >
> > I am assuming the MAC addr for eth1 is correct (different from
> eth0 anyway).
> > Is there a way to query the actual MAC address?
> >
> > I do not believe /etc/resolv.conf or /etc/hosts or
> /etc/sysconfig/network
> > play in this game.
> >
> > Hope someone has some ideas as I have run out.
> ----
> it is generally not recommended to have 2 NIC's in the same machine on
> the same network/subnet as you are doing. If your intentions were to
> increase the speed to the network by having 2 network cards accessing
> the same network, the method to do that is called bonding and generally
> there is an info/howto file on this and a module in the kernel to
> accomplish.
Putting the two NICs on seperate networks (192.168.xxx.30 and
192.168.yyy.30) solved the ping both with only one cable oportunity.
Still unable to ping the onboard NIC (now 192.168.1.30 255.255.255.0 at
eth0).
I tested the cables (swaped them) and they are both show good.
It is as if the onboard NIC (eth0 RH 8 box) is bad (not working). I can
ping it from the RH 8 box itself and it respondes. I tried pinging from a
Win 98 box (no firewall) and still only one NIC (eth1 192.168.123.30)
respondes.
How can I make sure I have the correct MAC address in
network-scripts/ifcfg-eth0? If it were the PCI card I could pull it out and
read it off the card. Would a wrong MAC address cause this?
>
> On RHEL 3 it would be found at...
> /usr/share/doc/iputils-20020927/README.bonding
>
> I don't know if bonding was a module in the 8.0 kernels but I would bet
> that it was - I believe you want identical brand/model #'s of the NIC's
> to make it work thus the motherboard/expansion slot model of 2 NIC's is
> likely not a good candidate for bonding.
>
> the hardware addresses must indeed be unique, they are listed in
> ifconfig - the first line called HWaddr for each adaptor that is up and
> running.
>
> It might be easier if we knew what you were trying to do.
>
Wanting this box to become a firewall between a WIFI router and my main
network. Moving (eventually) the samba server function else where.
Probably over kill, more of a learning curve.
> For your testing purposes - it may help to try commands like...
>
> ifdown eth0
> ifup eth1
Good find. The cables are somewhat buried. Thanks.
> if nothing else, save you the wear and tear on plugging/unplugging ;-)
>
> Craig
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