[CentOS] Weird CentOS 5.3 problem

[Robert Heller]

At Tue, 19 May 2009 09:04:43 -0400 CentOS mailing list <centos at centos.org> wrote:

> 
> 
> 
> I reimaged a compute node on our cluster with the latest 5.3 updates (we
> were previously running 5.2), but we kept the kernel at 2.6.18-92.1.10.el5
> until I can find time to rebuild some of our kernel modules.  After the
> image install finishes and the system reboots, the eth0 ethernet interface
> disappears.  If I do an ifconfig ­a, I see what should be eth0, but it¹s
> listed as __tmp2081258173.
> 
> [root at node0770 ~]# ifconfig -a
> __tmp2081258173 Link encap:Ethernet  HWaddr 00:1E:68:86:67:04
>           BROADCAST MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 b)  TX bytes:0 (0.0 b)
>           Interrupt:66
> 
> The dmesg output isn¹t very helpful:
> 
> [root at node0770 ~]# dmesg|grep eth0
> eth0: forcedeth.c: subsystem: 0108e:534b bound to 0000:00:08.0
> 
> 
> If I remove our lustre modules that were built for the 2.6.18-92.1.10.el5
> kernel and reboot, the eth0 interface reappears.  Another piece to this
> puzzle is that this problem only seems to happen on our Sun X2200¹s.  Our
> Dell 1950¹s work just fine after putting on the 5.3 updates.  Anyone know
> what could cause this behavior?

Check /etc/modprobe.conf (and
/etc/sysconfig/network-scripts/if-cfg-eth0) -- if you are doing a
disk-to-disk backup type of install, the alias for eth0 is very likely
wrong (and the HW address in /etc/sysconfig/network-scripts/if-cfg-eth0
is also wrong).  You may have to manually update these two files on the
'new' machine, since it likely has a different NIC, requiring a
different driver.  It will also have a different MAC (HW) address as
well. In the old days, kudzu would detect this and pop up during the
boot process.

What does lspci display?

> 
> Thanks,
> Randy
> MIME-Version: 1.0
> 
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>                                                                          

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