| 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 |
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| 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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