Date: Mon, 21 Sep 2009 09:41:31 +0700 (ICT) From: Olivier Nicole <Olivier.Nicole@cs.ait.ac.th> To: james@tanis.us Cc: freebsd-questions@freebsd.org Subject: Re: dhcpd related issues Message-ID: <200909210241.n8L2fVTG002381@banyan.cs.ait.ac.th> In-Reply-To: <7640F3CC-586D-4087-A78B-DF43F515A8E4@tanis.us> (message from James Tanis on Fri, 18 Sep 2009 06:03:38 -0400) References: <7640F3CC-586D-4087-A78B-DF43F515A8E4@tanis.us>
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Hi James, > I have a FreeBSD 7.0 gateway/server with isc-dhcpd 3.1.2p1_2. Late > yesterday I began having some unique and intermittent issues. > Basically, random computers will all of a sudden lose their dhcp > leases and be unable to contact the dhcp server. I did not see any reply to your question. It happened to me that a secondary switch was working badly with DHCP. If I rebooted the switch, it would work for a while, then fail again. But that was a sort of random failure, some ports would be affected sometime. The problem would occur a the first lease in the morning rather than at renewal time. As it was a cheap switch, unmanageable, I replaced it. > Sep 17 14:03:15 grendel dhcpd: ICMP Echo reply while lease > 192.168.1.253 valid. > Sep 17 15:25:19 grendel dhcpd: ICMP Echo Reply for 192.168.1.74 late > or spurious. > > which doesn't seem particularly relevant or heinous. Many more > computers than the ones above have been affected. I don't remember ever seeing such error, but I would think that late or spurions is not that innocent: it could be the symptom of a switch not working at its nominal speed. Of course you could also consider a computer on that switch being infected by some kind of virus and generating so much traffic it takes your switch out. Bests, Olivier
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