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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
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