RE : [lwip-users] MAC Question????

[Frédéric BERNON]

To be sure, do you answer to a thread post in... 2004 ? Else, it seems I miss 
some emails??? ;)

 
  
====================================
Frédéric BERNON 
HYMATOM SA 
Chef de projet informatique 
Microsoft Certified Professional 
Tél. : +33 (0)4-67-87-61-10 
Fax. : +33 (0)4-67-70-85-44 
Email : address@hidden 
Web Site : http://www.hymatom.fr 
====================================
P Avant d'imprimer, penser à l'environnement
 


-----Message d'origine-----
De : address@hidden [mailto:address@hidden De la part de H. Peter Anvin
Envoyé : mercredi 19 mars 2008 23:10
À : Mailing list for lwIP users
Objet : Re: [lwip-users] MAC Question????


K.J. Mansley wrote:
> On Wed, 2004-03-31 at 18:37, Kelly Chan wrote:
>> Hello,
>>
>> We can use ARP to query MAC address for a particular IP? How about 
>> the other way such that is there any protocol or broadcast messages 
>> we can use to query IP address for a particular MAC address?
> 
> Yes.  Funnily enough it's called Reverse ARP (RARP):
> 
> http://foldoc.doc.ic.ac.uk/foldoc/foldoc.cgi?query=rarp&action=Search
> 

Except RARP isn't really supported on most networks.  It's really more 
of an early alternative to BOOTP (which then, in turn, got superceded by 
DHCP.)

For a MAC address for an already configured host on the local network, 
one can send a ICMP ECHO (ping) packet with the appropriate unicast MAC 
address and the broadcast IP address.  You should get a response back, 
at which time you know the MAC.

        -hpa


_______________________________________________
lwip-users mailing list
address@hidden http://lists.nongnu.org/mailman/listinfo/lwip-users

Frédéric BERNON.vcf
Description: Frédéric BERNON.vcf