dhcp reserved address support

Samer Sayeed samers at teamf1.com
Wed Oct 8 13:44:48 UTC 2008


Bates reply was as follows for your reference
Try upgrading to a version of the DHCP server that supports `reserved'
leases in addition to the old `fixed'.  Check the documentation.  I THINK
`reserved' will allow you to do what you want where `fixed' will not.
 However, you should double check the documentation to me sure.



On Wed, Oct 8, 2008 at 7:13 PM, Samer Sayeed <samers at teamf1.com> wrote:

> Hi,
>
>        I am using 4.1.0a2 version of isc dhcp, can anyone please let me
> know which version of isc-dhcp support the fixes which Bates has mentioned.
> I will be glad if anyone can help me out.
>
> On Wed, Oct 8, 2008 at 6:40 PM, Glenn Satchell <Glenn.Satchell at uniq.com.au
> > wrote:
>
>> >Date: Wed, 8 Oct 2008 18:30:49 +0530
>> >From: "Samer Sayeed" <samers at teamf1.com>
>> >To: dhcp-users at isc.org
>> >Subject: Re: dhcp reserved address support
>> >
>> >Its not a very good option to give multiple range statements. ....
>> >Any other better idea ???
>>
>> Well unfortunately that's the way ISC dhcpd works.
>>
>> You may have used the MS dhcp, where typically you specify the whole
>> subnet, then mark certain IPs as not to be used. That's just as messy
>> if not more so, IMHO.
>>
>> The way most people do it it to assign all their host based
>> fixed-addresses in a block at either the top or bottom of the subnet,
>> and then have a single contiguous dynamic range.
>>
>> regards,
>> -glenn
>>
>>
>> >On Wed, Oct 8, 2008 at 6:09 PM, Glenn Satchell
>> ><Glenn.Satchell at uniq.com.au>wrote:
>> >
>> >> You can specify multiple range statements and omit the IPs that should
>> >> not be handed out dynamically, eg you want to exclude 192.168.10.25:
>> >>
>> >> subnet ... {
>> >>  range 192.168.10.20 192.168.10.24;
>> >>  range 192.168.10.26 192.168.10.29;
>> >>  ... other options ...
>> >> }
>> >>
>> >> or a single IP can be in the range, eg:
>> >>
>> >> subnet ... {
>> >>  range 192.168.10.50;
>> >>  ... othe roptions ...
>> >> }
>> >>
>> >> regards,
>> >> -glenn
>> >>
>> >> >Date: Wed, 8 Oct 2008 17:52:09 +0530
>> >> >From: "Samer Sayeed" <samers at teamf1.com>
>> >> >To: dhcp-users at isc.org
>> >> >Subject: dhcp reserved address support
>> >> >
>> >> >Need help on how to reserve and ip address from dhcp default range.
>> Does
>> >> >anyone have any patch related to this please reply.
>> >> >
>> >> >On Wed Oct 08 11:51:13 2008, samers at teamf1.com wrote:
>> >> >> HI,
>> >> >>
>> >> >>          In following case the the resolution which you gave fails.
>> >> >>
>> >> >> Ex.
>> >> >>
>> >> >> dhcp default range is 192.168.10.25 to 192.168.10.26.
>> >> >> I have declared a host as you mentioned using host declaration
>> >> >>
>> >> >> host hostname {
>> >> >> hardware ethernet one_of_my_clients_mac_address;
>> >> >> fixed-address  192.168.10.25;
>> >> >> }
>> >> >>
>> >> >> >>> Issue which I am facing is if I try to run dhclient from another
>> >> >before
>> >> >> my "one_of_my_clients_mac_address" lan host contacts then the other
>> lan
>> >> >host
>> >> >> is getting 192.168.10.25 ip address.
>> >> >
>> >> >If you do not want an address given out by the DHCP server, it should
>> not
>> >> >be in a range statement.  The "host" statement will provide the
>> address to
>> >> >the given mac, but will NOT block it from being handed out if it is
>> >> >available in a pool.
>> >> >
>> >> >Again, I ask that your questions be taken to the mailing list or that
>> you
>> >> >consider a support contract allowing you to support ISC.
>> >> >
>> >> >AlanC
>> >> >--
>> >> >Alan Clegg
>> >> >ISC Training and Support
>> >> >--
>> >> >Thanks & Regards
>> >> >SAmer SAyeed
>> >> >
>> >> >
>> >> >
>> >> >--
>> >> >Thanks & Regards
>> >> >SAmer SAyeed
>> >>
>> >>
>> >>
>> >
>> >
>> >--
>> >Thanks & Regards
>> >SAmer SAyeed
>>
>>
>>
>
>
> --
> Thanks & Regards
> SAmer SAyeed
>



-- 
Thanks & Regards
SAmer SAyeed
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