buzzwork at gmail.com
Wed Feb 4 16:21:40 UTC 2009
What if you have some L2 device (where the client is connected), not the L3
relay, that does DHCP snooping and add's option-82 in the packege for
validating the DHCP request, this is then dropped by the switch because the
server strip's the option-82 :-(
On Wed, Feb 4, 2009 at 2:02 PM, Glenn Satchell
<Glenn.Satchell at uniq.com.au>wrote:
> >Date: Wed, 4 Feb 2009 13:44:36 +0100
> >Subject: Re: DHCPINFORM
> >From: Marty Sørensen <buzzwork at gmail.com>
> >To: Users of ISC DHCP <dhcp-users at lists.isc.org>
> >X-BeenThere: dhcp-users at lists.isc.org
> > Hey Randall,
> > Thanks for the reply. It seens that the switch relay's the option-82 OK,
> > this case, but the server drops it ?
> > Martin
> DHCPINFORM is unicast to the dhcp server, so the switch's relay never
> sees it. Relays only see broadcast packets, then add the option-82 and
> forward tot he dhcp server.
> See the posts earlier today about how responses to DHCPINFORM don't
> look at existing lease data. This includes any options added by the
> relay when it processed the DHCPDISCOVER.
> dhcp-users mailing list
> dhcp-users at lists.isc.org
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