06-04-2012 02:34 AM - edited 03-07-2019 07:02 AM
Hello Experts,
last friday I had problem with IP conflit address from cisco router 2911 , all the time the router respond with ARP reply (duplicate use of IP : x.y.z.t with the same Mac Address ) and the IP subject of conflit dosen't appear in any router's interfaces configuration (basic configuration without dhcp) ,the problem was solved problem when I desactivete proxy arp but I can't understand this behavior , why arp proxy respond to all IP address with same Mac even the IP dosen't exist in router ?
Thanks for your responses.
06-04-2012 02:56 AM
Hi,
as long as the router that has proxy-arp enabled knows how to get to this IP it will ARP reply with its MAC.
Regards.
Alain
06-04-2012 03:33 AM
Ok ,
but theses IP address that create conflit dosen't figure at any network connected to this router
06-04-2012 04:55 AM
Hi,
if it has a route( even a default one) to these IP it will ARP reply.
Regards.
Alain
06-04-2012 05:20 AM
Ok thanks , i will check it.
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