Date: Tue, 1 Apr 2014 08:48:21 -0400 From: Rick Miller <vmiller@hostileadmin.com> To: Robert Huff <roberthuff@rcn.com> Cc: net@freebsd.org Subject: Re: questions about (system) dhclient Message-ID: <CAHzLAVGGR--GzG%2BzO80HLwPh-88e-2LswP5kaLHya1UqV1Kp6g@mail.gmail.com> In-Reply-To: <5339D0A0.1030903@rcn.com> References: <5339D0A0.1030903@rcn.com>
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On Mon, Mar 31, 2014 at 4:31 PM, Robert Huff <roberthuff@rcn.com> wrote: > [Please keep me CC'd as I am not subscribed. Thanks.] > > I have a system, running r263263, where dhclient is misbehaving. > (Yes - this is CURRENT, but I have no reason to believe this inherently a > version-specific issue. I am also on current@, and nothing like this has > been reported.) > The system has an Intel Pro/1000 ethernet card, "em0", connected > to a Arris CM820 cable modem. > This is the relevant portion of dhclient.conf: > > http://users.rcn.com/dhclient.conf > > Upon execution, I get this: > > http://users.rcn.com/roberthuff/dhcp_offer The conversation between a DHCP server and client consists of the initial DHCP DISCOVER request from the client broadcasted to the network to which a DHCP ACK is expected in reply from an available DHCP server. Upon receipt of DHCP ACK, the client sends another DHCP DISCOVER to the server asking for configuration information necessary to initialize networking. The server's response is a DHCP OFFER containing all the information requested by the client. I illustrate this in a sequence diagram describing a PXE workflow for FreeBSD installation at http://hostileadmin.com/images/FreeBSD_PXE_Install_Workflow.gif. The first four steps in the sequence is the workflow's first DHCP conversation. This output suggests only half of the conversation was completed. The client doesn't appear to have sent the second DHCP DISCOVER and thusly did not receive configuration information from the server. Have you ran packet captures to determine whether or not the whole conversation is occurring? -- Take care Rick Miller
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