[CentOS] Strange XEN on CentOS HWaddr Address Issue
rswwalker at gmail.com
Tue Aug 4 16:57:55 UTC 2009
On Aug 4, 2009, at 12:50 PM, Ross Walker <rswwalker at gmail.com> wrote:
> On Tue, Aug 4, 2009 at 12:30 PM, Brett Serkez<bserkez at gmail.com>
>> On Tue, Aug 4, 2009 at 9:09 AM, Christoph Maser<cmr at financial.com>
>>> When Xen starts does some trickery with your interfaces. You
>>> should see
>>> FE:FF:FF:FF:FF:FF on device peth0 and the real MAC-address on device
>>> All Xen vif devices will show also MAC FE:FF:FF:FF:FF:FF. That is
>>> totally normal.
>> I wanted to clarify on this point. Understood as far as the above,
>> but the issue is that the PHYSICAL MAC was changed to
>> This went so far as to still have this value even after rebooting on
>> the standard kernel and then uninstalling XEN:
>> # dmesg | grep eth1
>> eth1: RTL8110s at 0xee156c00, fe:ff:ff:ff:ff:ff, XID 04000000 IRQ 22
>> What ever happened during the first boot of XEN caused a permanent
>> change to this NIC as far as I can tell.
> Maybe because you are looking at the bridge's mac and not the
> ethernet's which would be peth0.
Actually that would be peth1
For a Xen server I find it better to disable the Xen network scripts
and setup a static bridged or routed setup.
Then it is predictable and iptables is infinitely easier to setup.
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