Gratuitous ARP

David Peterson davidp at
Mon Feb 17 18:56:17 UTC 2014

That is exactly the issue.  The wireless device uses proxy arp and responds
on the MAC address of the client which causes the NAK  to occur.  I am
looking to shut off the DHCPDECLINE functionality in this circumstance.


-----Original Message-----
From: at
[ at] On
Behalf Of Ted Lemon
Sent: Monday, February 17, 2014 1:50 PM
To: Users of ISC DHCP
Subject: Re: Gratuitous ARP

On Feb 14, 2014, at 10:01 AM, David Peterson
<davidp at> wrote:
> Has anyone seen issues with a DHCP response on certain wireless systems
where the client sends out gratuitous ARP along with the ACK message?  If so
is there a way for the DHCP server to shut off that capability in the client

The ARP isn't gratuitous.  The client is supposed to ARP for the address and
send a DHCPDECLINE if it's in use.   I take it you are having a problem with
this behavior-can you describe what's going on?

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