From owner-freebsd-stable Mon Mar 27 21: 4:21 2000 Delivered-To: freebsd-stable@freebsd.org Received: from point.osg.gov.bc.ca (point.osg.gov.bc.ca [142.32.102.44]) by hub.freebsd.org (Postfix) with ESMTP id 8792C37BA08 for ; Mon, 27 Mar 2000 21:04:19 -0800 (PST) (envelope-from Cy.Schubert@uumail.gov.bc.ca) Received: (from daemon@localhost) by point.osg.gov.bc.ca (8.8.7/8.8.8) id VAA16963; Mon, 27 Mar 2000 21:04:16 -0800 Received: from passer.osg.gov.bc.ca(142.32.110.29) via SMTP by point.osg.gov.bc.ca, id smtpda16961; Mon Mar 27 21:03:56 2000 Received: (from uucp@localhost) by passer.osg.gov.bc.ca (8.9.3/8.9.1) id VAA04869; Mon, 27 Mar 2000 21:03:56 -0800 (PST) Received: from cwsys9.cwsent.com(10.2.2.1), claiming to be "cwsys.cwsent.com" via SMTP by passer9.cwsent.com, id smtpdaw4853; Mon Mar 27 21:02:56 2000 Received: (from uucp@localhost) by cwsys.cwsent.com (8.9.3/8.9.1) id VAA07911; Mon, 27 Mar 2000 21:02:54 -0800 (PST) Message-Id: <200003280502.VAA07911@cwsys.cwsent.com> Received: from localhost.cwsent.com(127.0.0.1), claiming to be "cwsys" via SMTP by localhost.cwsent.com, id smtpdiF7900; Mon Mar 27 21:02:40 2000 X-Mailer: exmh version 2.1.1 10/15/1999 Reply-To: Cy Schubert - ITSD Open Systems Group From: Cy Schubert - ITSD Open Systems Group X-OS: FreeBSD 3.4-RELEASE X-Sender: cy To: "Jim King" Cc: "Cy Schubert - ITSD Open Systems Group" , "David Gilbert" , freebsd-stable@FreeBSD.ORG Subject: Re: 4.0-STABLE dhcp conflicts. In-reply-to: Your message of "Mon, 27 Mar 2000 22:53:09 CST." <004f01bf9871$848e7c00$08e48486@marble> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Date: Mon, 27 Mar 2000 21:02:40 -0800 Sender: owner-freebsd-stable@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.ORG 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