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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 (Brian Rak) 2. Re: one-lease-per-client... seriously (Jeff Wieland) ---------------------------------------------------------------------- Message: 1 Date: Fri, 16 Sep 2016 10:14:39 -0400 From: Brian Rak <b...@gameservers.com> To: Users of ISC DHCP <dhcp-users@lists.isc.org> Subject: Re: one-lease-per-client... seriously Message-ID: <2d205820-7f16-d282-bbda-32101613f...@gameservers.com> Content-Type: text/plain; charset=windows-1252; format=flowed On 9/15/2016 4:33 PM, Jeff Wieland wrote: > Brian Rak 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. 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. >> >> I already have: >> >> one-lease-per-client true; >> deny duplicates; >> >> in my config, which doesn't seem to be helping. >> >> This is a problem, because I'm using DHCP for PXE booting, which >> means each machine ends up getting three concurrent leases: >> >> one via the firmware built into the nic >> iPXE then gets chainloaded, and gets another lease >> the actual OS gets loaded, and gets a different lease >> >> It's very difficult to get these all to share leases, and I'd really >> much rather handle this on the DHCP server side. DNSMasq can do >> this, but it doesn't scale well enough. >> >> _______________________________________________ >> dhcp-users mailing list >> dhcp-users@lists.isc.org >> https://lists.isc.org/mailman/listinfo/dhcp-users >> > I've not used it, but it looks like the ignore-client-uids statement > might work. That looks like exactly what I wanted, thanks. I guess I was looking at an old man page. ------------------------------ Message: 2 Date: Fri, 16 Sep 2016 10:17:43 -0400 From: Jeff Wieland <wiel...@purdue.edu> To: Users of ISC DHCP <dhcp-users@lists.isc.org> Subject: Re: one-lease-per-client... seriously Message-ID: <57dbff07.4080...@purdue.edu> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Jeff Wieland, UNIX/Network Systems Administrator Purdue University IT Infrastructure Services UNIX Platforms Brian Rak wrote: > > > On 9/15/2016 4:33 PM, Jeff Wieland wrote: >> Brian Rak 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. 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. >>> >>> I already have: >>> >>> one-lease-per-client true; >>> deny duplicates; >>> >>> in my config, which doesn't seem to be helping. >>> >>> This is a problem, because I'm using DHCP for PXE booting, which >>> means each machine ends up getting three concurrent leases: >>> >>> one via the firmware built into the nic >>> iPXE then gets chainloaded, and gets another lease >>> the actual OS gets loaded, and gets a different lease >>> >>> It's very difficult to get these all to share leases, and I'd really >>> much rather handle this on the DHCP server side. DNSMasq can do >>> this, but it doesn't scale well enough. >>> >>> >> I've not used it, but it looks like the ignore-client-uids statement >> might work. > That looks like exactly what I wanted, thanks. I guess I was looking > at an old man page. Not a problem. I'm curious as to whether it works. -- Jeff Wieland, UNIX/Network Systems Administrator Purdue University IT Infrastructure Services UNIX Platforms ------------------------------ 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 7 *****************************************