As mentioned here: https://tools.ietf.org/html/rfc5227#section-2
Before beginning to use an IPv4 address (whether received from manual configuration, DHCP, or some other means), a host implementing this specification MUST test to see if the address is already in use, by broadcasting ARP Probe packets.
For example, I have a pfSense router and and an Ubuntu host. After the ACK stage of the DHCP DORA, the router is sending out a ARP request asking for the MAC of the Ubuntu. And Ubuntu responds to it, and that is it...
As far as I understand, Ubuntu should be sending out ARP probe to check if no other host is using the IP. However, it does not. Could it be that ARP probing is not used in some implementations?
No comments:
Post a Comment