From: Sila Moni (silamoni@yahoo.com)
Date: Thu Jul 07 2005 - 07:41:25 GMT-3
Helena,
Is this server part of a server loadbalancer cluster?
If so, that would explain where the virtual mac@ came
from. Otherwise, I would guess that you have a bad
arp table.
Sila
--- Helena Qiu <ccie_helena@yahoo.ca> wrote:
> 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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