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List:       dhcp-users
Subject:    R: R: R: Relay agent with dhcp server on same subnet
From:       "Autuori Gianluigi" <Autuori.Gianluigi.Wintime () ansaldobreda ! it>
Date:       2009-11-19 9:35:40
Message-ID: A691B9541CD614449A7702B21C5BBD5905F03CB2 () abnaex01 ! ab ! ansaldobreda ! it
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Thanks
So the only way to do it correctly is to use a switch that suppress the original \
broadcast DHCP packets. The one I use doesn't permit this. Gianluigi Autuori


-----Messaggio originale-----
Da: dhcp-users-bounces@lists.isc.org [mailto:dhcp-users-bounces@lists.isc.org] Per \
                conto di Bruce Hudson
Inviato: mercoledì 18 novembre 2009 22.45
A: dhcp-users@lists.isc.org
Oggetto: Re: R: R: Relay agent with dhcp server on same subnet

> I think server nakew client request because there isn't any 
> agent.circuit-id field in its packet.

    You are correct. Your switch is acting as a DHCP relay but it does not appear to \
be suppressing the original broadcast DHCP packets. This means your server is seeing \
every request twice: once directly from the client without relay information and one \
via the switch that includes the relay option. 

    The direct DISCOVER would have generated an error message in the server's log \
that no addresses were free and dropped. However, the direct REQUEST generates a NAK.

    This is probably a configuration error in the switch.
--
Bruce A. Hudson				| Bruce.Hudson@Dal.CA
ITS, Networks and Systems		|
Dalhousie University			|
Halifax, Nova Scotia, Canada		| (902) 494-3405
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