DHCPDECLINE messages question
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.
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