[Dnsmasq-discuss] ARP ignores DHCP ACKs !

richardvoigt at gmail.com richardvoigt at gmail.com
Tue Dec 24 18:04:45 GMT 2013


I agree that *not* responding is the correct and required behavior.

Any response would indicate an address collision.


On Tue, Dec 24, 2013 at 8:55 AM, Matthias Andree <matthias.andree at gmx.de>wrote:

> Am 24.12.2013 13:35, schrieb Nikita N.:
> > Hi :) Im having a strange issue here with DHCP/ARP I cant solve..
> > DHCP works good, it receives a REQ from client MAC asking the preferred
> > ip, e.g. 192.168.0.10, and DHCP answers correctly ACK..
> > But after that, my client keeps asking the following ARP requests to
> > broadcast: "Who has 192.168.0.10? Tell 0.0.0.0" .. it expects the answer
> > like "192.168.0.10 is at XX.XX.XX.XX.XX", where XX is the client MAC..
> > but it never comes :(
>
> Perhaps it is running duplicate address detection to make sure nobody is
> using the address, before it grabs it?  Or the DHCP responses do not
> make it for the client, or the client drops them on the floor.
>
> > It looks like dnsmasq does NOT inform the system ARP about the client ip
> > it just ACKed, resulting always in connection error/absent ..
>
> Nor should it.
>
>
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