DHCPDECLINE messages question

Ted Lemon mellon at fugue.com
Sat Sep 30 00:32:10 UTC 2006

Dennis Dufford wrote:
> It is true that another host already using an offered IP would cause the client to DHCPDECLINE the offered IP.
> However, what is strange in the logs below is that the client did two sequences of: (DHCPREQUEST that was DHCPACK'd by the server)  
> Then the client did the DHCPDECLINE - all in the same second (12:46:48)

Looks like there are two paths from the client to the server when you're
doing a unicast, for some reason.   DHCPDECLINE _always_ comes after a
DHCPACK, so that's not shocking.   You'd think DHCPDECLINE would come
*before* the DHCPREQUEST, but it doesn't, because the client isn't
allowed to ARP for its own IP address until the server has confirmed
that it's got a lease by sending a DHCPACK.

More information about the dhcp-users mailing list