Date: Mon, 27 Mar 2000 21:02:40 -0800 From: Cy Schubert - ITSD Open Systems Group <Cy.Schubert@uumail.gov.bc.ca> To: "Jim King" <king@sstar.com> Cc: "Cy Schubert - ITSD Open Systems Group" <Cy.Schubert@uumail.gov.bc.ca>, "David Gilbert" <dgilbert@velocet.ca>, freebsd-stable@FreeBSD.ORG Subject: Re: 4.0-STABLE dhcp conflicts. Message-ID: <200003280502.VAA07911@cwsys.cwsent.com> In-Reply-To: Your message of "Mon, 27 Mar 2000 22:53:09 CST." <004f01bf9871$848e7c00$08e48486@marble>
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In message <004f01bf9871$848e7c00$08e48486@marble>, "Jim King" writes: > On Monday, March 27, 2000 10:40 PM, Cy Schubert - ITSD Open Systems Group > wrote: > > n message <14559.40450.544687.51037@trooper.velocet.net>, David Gilbert > > writes > > : > > > It appears that when I run two (not sure if one does it) tcpdumps on > > > the dhcp server, the dhcp clients don't get any responses to their > > > queries. Is there some flaw in the dhcpd bpf rules? > > > > I suspect that the dhcp server set the interface to promiscuous mode so > > it can listen for broadcasts. Tcpdump sets up an interface for > > promiscuous opertion and when you exit tcpdump it returns it to > > non-promiscuous operation. Killing and restarting your dhcp server > > after exiting tcpdump should solve your problem, as it will set the > > interface up for promiscuous operation again. > > I regularly run (and exit) tcpdump and it doesn't affect my DHCP server > (isc-dhcp2). dhcpd keeps on handing out leases after tcpdump has exited. > > syslog has "promiscuous mode enabled" and "promiscuous mode disabled" when I > start and exit tcpdump, which is a bit confusing. I'm guessing that > promiscuous mode is on the entire time and the messages really mean > something like "promiscuous mode reference count incremented/decremented". It was just a guess. I've been wrong before and this wasn't the last time. Regards, Phone: (250)387-8437 Cy Schubert Fax: (250)387-5766 Team Leader, Sun/DEC Team Internet: Cy.Schubert@osg.gov.bc.ca Open Systems Group, ITSD, ISTA Province of BC To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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