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 : [EMAIL PROTECTED] Web Site : http://www.hymatom.fr ==================================== P Avant d'imprimer, penser à l'environnement -----Message d'origine----- De : [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] 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 It's really more of an early alternative to BOOTP (which then, in turn, got superceded by DHCP.)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 [email protected] http://lists.nongnu.org/mailman/listinfo/lwip-users
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