Brett Serkez wrote:
- 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.
I had the same problem after (IIRC) a kernel panic. After a few rounds of research and ineffective treatments I shut down the computer, left it unplugged for a few minutes, and turned it back on. The MAC went back to normal and it hasn't been an issue since.
Hope that helps.