From: Helena Qiu (ccie_helena@yahoo.ca)
Date: Thu Jul 07 2005 - 01:41:10 GMT-3
I connected a server to the port fa0/19 of 2900 switch. When I show mac-address-table, it shows mac add 02:02:0A:D2:0C:A4 to this port. When I show arp, it shows the server IP has another MAC 02:BF:0A:XXXXXX, which is assigned as virtual MAC to the server's adapter. And I cannot find where the MAC is assigned 02:02:0A:D2:0C:A4.
The most wired thing is when I use span and sniffer the port in anothe port, i find the server use 02:02:0A:D2:0C:A4 as source MAC to send ARP request, but inside the ARP packet, it use MAC 02:BF:0A:XXXXXX as source MAC. When the router reply the ARP request, it use 02:02:0A:D2:0C:A4 as target MAC, and then it fails because the MAC add is not exist.
When I sniffer in the server, i find that server sending ARP request with MAC 02:BF:0A:XXXXXX as source. It's so wired.
Please let me if you have any idea about this problem. And any special meaning about the MAC 02:02:0A:D2:0C:A4, is it use for any special application?
Pls. advise. Thanks.
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