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From: "Andrey V. Semyonov" <wilfre@mail.ru>
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Subject: Re: arp problem?
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spen wrote:
> I get this message all the time and I 've searched around forums but did not find something about it..
> 
> arp: 00:10:b5:df:b5:ff attempts to modify permanent entry for 10.101.10.47 on xl0
> arp: 00:10:b5:df:b5:ff attempts to modify permanent entry for 10.101.10.47 on xl0
> arp: 00:10:b5:df:b5:ff attempts to modify permanent entry for 10.101.10.47 on xl0
> arp: 00:10:b5:df:b5:ff attempts to modify permanent entry for 10.101.10.47 on xl0
> arp: 00:10:b5:df:b5:ff attempts to modify permanent entry for 10.101.10.47 on xl0
> 
> after many times of repeating itself I get a message which says "last message repeated x times"..
> does anybody have any idea about it?
> ps: 10.101.10.47 is another pc on the local lan...


You have a permanent entry in your ARP-table for that IP. But someone 
tries to use this IP on another computer, or NIC was changed on the PC 
with that IP.