ARP packets

[redhat at billoblog.com]

Just out of curiosity, would this happen if you changed MAC addresses on your box and the arp cache had the old MAC address?  I run a script that changes my MAC address on every boot up and every six hours when up, for instance.


billo

On Thu, 23 Sep 2010, Rick Stevens wrote:

> On 09/23/2010 04:14 PM, Bret Stern wrote:
>> Ladies and gentlemen,
>> 
>> 
>> Playing with Wireshark and seeing
>>   "Gratuitous ARP for 63.209.4.211 (Request)"
>> coming from my Fedora 12 ftp server.
>> 
>> The ip address is a bit of a mystery since this is a fresh install, and
>> I couldn't find any nic card setup in the bios which could contain this
>> number. Must be in the server somewhere.
>> 
>> Who's gonna solve this one? Where can I look?
>
> There are a couple possibilities.  If a machine has two NICs on the
> same IP you'll get that message.  The offender could be another physical NIC 
> or an alias of another NIC (e.g. "eth0:0").
>
> Another possibility is that you have a bond running (two NICs set up as
> either a failover pair or an aggregate).  If the system fails over from
> one NIC to the other one (or if it switches when load sharing), an ARP
> may be sent--depending on the bond type.
>
> ----------------------------------------------------------------------
> - Rick Stevens, Systems Engineer, C2 Hosting          ricks at nerd.com -
> - AIM/Skype: therps2        ICQ: 22643734            Yahoo: origrps2 -
> -                                                                    -
> -      "Microsoft is a cross between The Borg and the Ferengi.       -
> -  Unfortunately they use Borg to do their marketing and Ferengi to  -
> -               do their programming."  -- Simon Slavin              -
> ----------------------------------------------------------------------
>
> _______________________________________________
> Redhat-install-list mailing list
> Redhat-install-list at redhat.com
> https://www.redhat.com/mailman/listinfo/redhat-install-list
> To Unsubscribe Go To ABOVE URL or send a message to:
> redhat-install-list-request at redhat.com
> Subject: unsubscribe
>