Ethereal-users: [Ethereal-users] RE: Ethereal-users Digest, Vol 19, Issue 29 RE: MAC Address dup

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From: "Burton, Lowell" <lowell.e.burton@xxxxxxxxxxxxxx>
Date: Fri, 19 Nov 2004 12:13:21 -0600


   6. RE: MAC Address duplicates (Giles Scott)


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There are other reasons that could have caused this.

1) If you (someone) has a laptop connected to both your wired and
wireless vlans, and you turned on bridging between the two NICs on the
laptop.
2) If you have a loop on your network, but you forgot to enable spanning
tree on every port of every ethernet switch.
3) A bug in the HP ethernet switch code.
4) You could be under attack from some device which is using spoofed IP
addresses or spoofed MAC addresses.

Call me if you would like some help.

-LB