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To subscribe or unsubscribe via the World Wide Web, visit https://lists.isc.org/mailman/listinfo/dhcp-users or, via email, send a message with subject or body 'help' to dhcp-users-requ...@lists.isc.org You can reach the person managing the list at dhcp-users-ow...@lists.isc.org When replying, please edit your Subject line so it is more specific than "Re: Contents of dhcp-users digest..." Today's Topics: 1. Re: one-lease-per-client... seriously (Chuck Anderson) ---------------------------------------------------------------------- Message: 1 Date: Sun, 18 Sep 2016 03:21:36 -0400 From: Chuck Anderson <c...@wpi.edu> To: dhcp-users@lists.isc.org Subject: Re: one-lease-per-client... seriously Message-ID: <20160918072136.gd1...@angus.ind.wpi.edu> Content-Type: text/plain; charset=us-ascii On Fri, Sep 16, 2016 at 08:00:15AM +0100, Simon Hobson wrote: > > On 15 Sep 2016, at 21:00, Brian Rak <b...@gameservers.com> wrote: > > > I'm running into an issue where DHCPD (v4.3.4 and older versions) is > > issuing multiple leases to the same mac address. It appears to be looking > > at the DHCP Client-ID field to determine what a unique client is. > > That is by design as is **REQUIRED** by the RFCs. > It's a long standing problem that some real-world situations clash with this > - most notably when there is multi-boot with Windoze and anything else since > Windows defaults to using the MAC address as client-id and everything else > defaults to not sending one. But that's what the standards require and the > ISC implementation has always been intended to be a "reference" > implementation that completely meets the standards as laid down (unlike > several other servers which really do break the rules a lot). > > > I'd much rather it ignore everything except for the client's mac address, > > but I can't seem to find an option to do this. > > It used to require patches, but I see Jeff has suggested an option to deal > with this. A better way might be to identify the various boot stages and hand out very short leases for PXE, etc. That way you don't violate the standard, but the extra leases don't hang around for very long. ------------------------------ Subject: Digest Footer _______________________________________________ dhcp-users mailing list dhcp-users@lists.isc.org https://lists.isc.org/mailman/listinfo/dhcp-users ------------------------------ End of dhcp-users Digest, Vol 95, Issue 8 *****************************************