Am Dienstag, den 04.08.2009, 14:43 +0200 schrieb Brett Serkez:
Ran into a strange issue with XEN on CentOS that I think is specific to CentOS, which is why I'm starting by posting to this list first, I'll post on the XEN list depending on responses. My sense is this issue has something to do with how CentOS handles network setup on first boot of the XEN kernel.
Installed a brand new CentOS 5.3 server with minimal packages.
Installed XEN, modified grub.conf to boot off of the XEN kernel and rebooted.
After reboot, network connectivity was lost.
Investigation concluded the issue was that the HWaddr address of the
physical NIC matched the fabricated HWaddr that XEN uses for most of its adapters: FE:FF:FF:FF:FF:FF.
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 eth0. All Xen vif devices will show also MAC FE:FF:FF:FF:FF:FF. That is totally normal.
Chris
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