DHCP static leases

[Brandon Munger]

Thanks Glenn,

I think the solution is to migrate the printers to a new range outside 
of the
dynamic scope if there is no other alternative.


Brandon Munger
Unix Administrator
Edison State College
(239)985-8362 x1862



Glenn Satchell wrote:
> Hi Brandon
>
> I can think of two different solutions hare.
>
> 1. Give your printers a new IP address so that all the fixed-address
> hosts are grouped together outside the dynamic range?
>
> 2. Give them a really *long* lease time, like one or more years. Could
> either use a class/sub-class or group, eg:
>
> # printers
> group {
> 	min-lease-time 31536000;	# one year
> 	host foo { hardware ethernet ...; }
> }
>
> or
>
> class "printers" {
> 	match hardware;
> 	min-lease-time 31536000;	# one year
> }
> subclass "printers" 1:8:0:2b:4c:39:ad;
>
> See the section in the dhcpd.conf man page titled SUBCLASSING.
>
> regards,
> -glenn
>   
>> On Mon, Jan 26, 2009 at 9:58 PM, Brandon Munger <bmunger at edison.edu> wrote:
>>
>>     
>>> Yes, it is defined as a host declaration with the fixed-address.
>>> How are reserved leases defined?  Can it be defined in the host
>>> declaration area?  Thank you.
>>>
>>> Brandon
>>>
>>>
>>> Simon Hobson wrote:
>>>
>>>       
>>>> Brandon Munger wrote:
>>>>
>>>>  Yes those static leases are in the range.  We use this for IP printers so
>>>>         
>>>>> what we normally
>>>>> do is turn the printer on, let it get an IP address, then go into the
>>>>> dhcpd.conf and add
>>>>> that as a static address.
>>>>>
>>>>>           
>>>> I assume by "static lease" you mean "host declaration with fixed address"
>>>> ?
>>>>
>>>> If that is the case then you MUST NOT have the static address included in
>>>> any dynamic range<period>
>>>>
>>>> If you have the address in a dynamic range then you are telling the server
>>>> that the address is available for leasing to clients, so it does just that.
>>>> I think version 4 introduces a facility for reserved leases - so you could
>>>> continue dynamically allocating addresses, and then simply set the lease to
>>>> reserved so it cannot be given to any other client.
>>>>
>>>>
>>>>         
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>>
>> -- 
>> Thanks & Regards
>> SAmer SAyeed
>>     
>
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