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Re: NIC to NIC connection

From: Gaetano Mendola <gmendola(at)mbigroup(dot)it>
To: jak(at)uiuc(dot)edu
Cc: Gaetano Mendola <mendola(at)bigfoot(dot)com>,Bruno Wolff III <bruno(at)wolff(dot)to>, pgsql-admin(at)postgresql(dot)org
Subject: Re: NIC to NIC connection
Date: 2004-10-21 17:05:40
Message-ID: 4177EC64.30009@mbigroup.it (view raw or flat)
Thread:
Lists: pgsql-admin
Jay A. Kreibich wrote:
> On Thu, Oct 21, 2004 at 10:07:33AM +0200, Gaetano Mendola scratched on the wall:
> 
>>Bruno Wolff III wrote:
>>
>>>Also I believe that if
>>>a switch doesn't remember where a particular mac address is it will send
>>>the packet to all of the attached ports.
>>
>>I don't think so, I guess the switch perform a sort of arpping in order to
>>detect who have a macaddress assigned,
> 
> 
>   No, he's right. If the MAC to port mapping has not been learned by
>   the switch, the packet is flooded to all ports or (for really bad
>   switches) dropped.  A switch is a pure layer-two device and ARP
>   involves layer-three addresses and concepts.

We have some switches that are able to do ip routing too... :-(
I have to admint that I'm not a switch specialist but given the ability to do
routing I was imagine the arpping trich...


Regards
Gaetano Mendola





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