re fails diagnostics when heavy traffic

[Sean McNeil]

I've just figured this out.  At times, my re0 device would not show up
and I'd have to reboot once or twice before it worked.  Then I noticed I
couldn't get it at all and it turned out it was because I was streaming
some heavy data at the time.  Then I noticed it was failing because of
the following:

Aug 19 20:52:01 server kernel: rgephy0: <RTL8169S/8110S media interface> on miibus1
Aug 19 20:52:01 server kernel: rgephy0:  10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 1000baseTX-FDX, auto
Aug 19 20:52:01 server kernel: re0: Ethernet address: 00:0c:76:e9:2c:58
Aug 19 20:52:01 server kernel: re0: diagnostic failed, failed to receive packet in loopback mode
Aug 19 20:52:01 server kernel: re0: attach aborted due to hardware diag failure

Anything I can do to assist in fixing this please let me know.  It has
been a frustrating issue.

Cheers,
Sean