Two offers in response to one discovery

John Miller miller at
Wed Dec 14 16:25:12 UTC 2011


From: at
[ at] On Behalf Of
jeffrey j donovan
Sent: Wednesday, December 14, 2011 10:33 AM
To: Users of ISC DHCP
Subject: Re: Two offers in response to one discovery



On Dec 14, 2011, at 10:10 AM, John Miller wrote:

I do not have all the details just yet, but I want to ask a general question
to see how much deeper I need to go.


We are using Bradford's Campus Manager, which uses the ISC DHCP server (not
sure yet what version) and it is the only DHCP server on the network. What I
am seeing in a pcap is the WindowsXP client, after a release/renew, send the
discovery and the server responding with 2 offers of 2 different IP
addresses. First question is does this seem to be any kind of normal
behavior? Second question is what additional information do I need to
provide to help resolve this issue?


it depends,.. your client could have a previous lease from another zone or
another time. The two will basically argue until the client accepts the next
available lease.



The problem seems to be that the client never gives up, but rather the
server seems to give up.

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