[NBLUG/talk] Strange ethernet issue

Steve Johnson srj at adnd.com
Tue Apr 10 09:49:41 PDT 2012


Just as a follow up..  My switch tech is going to upgrade the IOs on
the switch tonight, just to rule that out.  So I will post an update
tomorrow if this fixes it.

-Steve


On Tue, Apr 10, 2012 at 9:40 AM, Steve Johnson <srj at adnd.com> wrote:
> Hi Guys,
>
> I am running 3 linux boxes all on the same network, running static 10
> net addresses, each on their own IP address..  A strange thing has
> started happening about a month ago, if I reboot the box when the
> system comes up at the point when it tries to bring up the eth0
> interface I get an error "IP Address in use by another host" and then
> the interface does not come up.  Loggin in from the console as root
> and running ifup eth0 gives me the same error.  The only way I can get
> the interface to come up is to physically unplug the ethernet, then
> run ifup eth0, that brings up the eth0 correctly, and then plug the
> ethernet cable back in.. Then it runs fine until another reboot (Or if
> I ifdown eth0 I will have the same problem)..
>
> I rebooted the switch last night, incase it was a switch issue and
> that did not clear it up.  My switch guys assure me that nothing has
> changed on the switch.  I have verified that there are not any rogue
> machines on the switch trying to steal my IP addresses.. So I am at a
> loss as to what could be causing this.
>
> It is happening on 3 Linux boxes, all three are on different hardware
> (same vendor, but different models) and all 3 are on different
> versions of linux
>
> Box 1 -  RedHat Enterprise Linux 3
> Box 2 -  RedHat Enterprise Linux 4 (Nahant update 5)
> Box 3 -  RedHat Enterprise Linux 5.8 (Tikanga)
>
> The RHEL3 box was end of lifed a while back, so I know there have not
> been any patches in the time that this started failing.
>
> Here's my eth0 configs for each box, incase it helps.
>
> Box 1 :
>
> # Intel Corp.|82557/8/9 [Ethernet Pro 100]
> DEVICE=eth0
> BOOTPROTO=static
> BROADCAST=10.254.1.255
> HWADDR=00:02:B3:CF:16:DE
> IPADDR=10.254.1.58
> NETMASK=255.255.255.0
> NETWORK=10.254.1.0
> ONBOOT=yes
> TYPE=Ethernet
>
> Box 2 :
>
> DEVICE=eth0
> TYPE=Ethernet
> ONBOOT=yes
> BOOTPROTO=static
> HWADDR=00:18:8B:F7:1F:63
> NETWORK=10.254.1.0
> GATEWAY=10.254.1.1
> NETMASK=255.255.255.0
> IPADDR=10.254.1.60
> BROADCAST=10.254.1.255
>
> Box 3 :
>
>
> # Broadcom Corporation NetXtreme II BCM5708 Gigabit Ethernet
> DEVICE=eth0
> BOOTPROTO=static
> BROADCAST=10.254.1.255
> HWADDR=00:19:B9:DD:CA:45
> IPADDR=10.254.1.46
> IPV6ADDR=
> IPV6PREFIX=
> NETMASK=255.255.255.0
> NETWORK=10.254.1.0
> ONBOOT=yes
>
>
> Ay ideas, or clues would be greatly appreciated.. I've been trying to
> trouble shoot this for over a month now with now luck.
>
> -Steve



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