[CentOS] Strange XEN on CentOS HWaddr Address Issue
bserkez at gmail.com
Tue Aug 4 17:30:51 UTC 2009
> Maybe because you are looking at the bridge's mac and not the
> ethernet's which would be peth0.
No I am not. dmesg shows the kernel messages at boot and it is
looking at the physical device, let's not get distracted, the issue is
clear in this regard. As I previously stated, this happens even when
uninstalling XEN and booting off the non-XEN kernel since the install
> indeed, AFAIK all hardware adapters start with 00. This must have been set
> in the BIOS or with a boot option or in the network config.
This was helpful, gave me places/incentive to continue looking.
In /etc/sysconfig/network-scripts/ifcfg-eth1 I found:
# Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet
So now I know what the original MAC address was.
Here is where it gets interesting. The following file was modified at
the date/time that the XEN kernel was first booted:
and it has fe:ff:ff:ff:ff:ff for BOTH network adapters:
desc: "Realtek Semiconductor Co., Ltd. RTL-8169 Gigabit Ethernet"
desc: "Intel Corporation 82562EZ 10/100 Ethernet Controller"
Everything I'm finding is re-enforcing my original theory that XEN
modified the hwaddr of this NIC.
The question continues to be what caused this and how to change it
back. Given this is a stock system, I have to believe others must
have/may run into this issue.
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