Re: NIC to NIC connection - Mailing list pgsql-admin

From Gaetano Mendola
Subject Re: NIC to NIC connection
Date
Msg-id 4177EC64.30009@mbigroup.it
Whole thread Raw
In response to Re: NIC to NIC connection  ("Jay A. Kreibich" <jak@uiuc.edu>)
List 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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