[CentOS] ARP Problem ???

Tue Jun 12 14:20:34 UTC 2007
Craig Van Ham <craigv at evsl.com>

My router is 139.142.16.1.

It does this to a couple IP's 

8:18:08.684747 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:08.713629 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:08.713994 arp who-has 139.142.16.57 tell 139.142.16.1
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08:18:25.182544 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.196005 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.215703 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.231411 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.250126 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.262578 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.280534 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.292248 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.305463 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.324663 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.337634 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.354336 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:25.704747 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:26.751641 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:27.744765 arp who-has 139.142.16.57 tell 139.142.16.1
08:18:28.744748 arp who-has 139.142.16.57 tell 139.142.16.1

-----Original Message-----
From: centos-bounces at centos.org [mailto:centos-bounces at centos.org] On Behalf
Of Bob Chiodini
Sent: Tuesday, June 12, 2007 6:39 AM
To: CentOS mailing list
Subject: Re: [CentOS] ARP Problem ???



Robert Moskowitz wrote:
> Craig Van Ham wrote:
>>
>> Does any one know if this is normal operating of ARP. Or where to 
>> start looking.
>>
>> I am seeing a lot of ARP requests for my router IP from the same IP 
>> within seconds.
>>
>>
>> 21:04:41.112929 arp who-has IP tell MY ROUTERS IP
>>
> Get us the MAC address that is asking. This will give us the card 
> manufacturer, which will then, perhaps tell you which system on your 
> network is the culprit.
>
> _______________________________________________
> CentOS mailing list
> CentOS at centos.org
> http://lists.centos.org/mailman/listinfo/centos
It looks like it's his router that is asking and the requested device is 
not responding.  Is the "who-has IP" address up and valid?

Bob...

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