DHCP-binding states

[Glenn Satchell]

This is from the dhcpd.leases man page:

     The binding state statement  declares  the  lease's  binding
     state.   When  the  DHCP server is not configured to use the
     failover protocol, a lease's binding state  will  be  either
     active or free.   The failover protocol adds some additional
     transitional states, as well  as  the  backup  state,  which
     indicates  that the lease is available for allocation by the
     failover secondary.

My reading of this is "free" means unused. "active" or "backup" mean it
is in use in a failover configuration such as yours.

The ultimate source of truth is the source code, so some searching
through that might find what you want.

In a simple model you could assume that any other state meant "not in
use" perhaps?

regards,
-glenn

>Date: Mon, 20 Oct 2008 14:49:41 +0200
>From: crashnb <manuel.helmbrecht at gmx.de>
>To: dhcp-users at isc.org
>Subject: Re: DHCP-binding states
>
>Hallo Glenn,
>
>i have readed the dhcpd.leases man page so how i did it for the rest of 
>the dhcp man pages.
>but there is now where described what is released and expired!!! i have 
>searched the web too but no where is a decription.
>
>Tim Peiffer has described me what are these felds are for, but i would 
>be shure that i am right.
>
>best regards
>
>Manuel Helmbrecht
>
>Glenn Satchell schrieb:
>> Please read the dhcpd.leases man page - it explains the format of the
>> file and what all the fields mean.
>>
>> Also, search the list archives - there are many freely available tools
>> that analyse dhcpd.leases. One of them may be suitable.
>>
>> regards,
>> -glenn
>>
>>   
>>> Date: Mon, 20 Oct 2008 10:05:05 +0200
>>> From: crashnb <manuel.helmbrecht at gmx.de>
>>> To: dhcp-users at isc.org
>>> Subject: Re: DHCP-binding states
>>>
>>> Hello,
>>>
>>> thank you for your help.
>>> If i had anderstand that correct than is Free and Backup, free leases 
>>> and the others are in that moment are not free.
>>>
>>> Regards,
>>>
>>> Manuel Helmbrecht
>>> Tim Peiffer schrieb:
>>>     
>>>> Free and active are polar opposites.  They are the ends of the 
>>>> continuum.  The others fall in the middle.
>>>>
>>>> Free   - Never Used
>>>> Backup - In an active/active load balanced environment, backup is an 
>>>> address that is free but managed by the peer server
>>>> Released - Leased at some point in time, and given back to the pool
>>>> Expired - Leased at some point in time, and the client stopped 
>>>> renewing for at least 2 lease periods.
>>>> Active - Currently in use
>>>>
>>>> Regards,
>>>> Tim Peiffer
>>>> Network Support Engineer
>>>> University of Minnesota/NorthernLights GigaPOP
>>>>
>>>> crashnb wrote:
>>>>       
>>>>> Hello dhcp List,
>>>>>
>>>>> i havt to write a perlscript to check how match ip-addresses are 
>>>>> free. but we have a dhcp-server configurated with failover and 
>>>>> loadbalancing. want to check the dhcpd.leases file for that, but i 
>>>>> don't know what binding state
>>>>> free(i think this lease is free), active(i think this lease is 
>>>>> assigned), expired, released and backup is. can anybody describe me 
>>>>> what this binding states are for.
>>>>>
>>>>> Sorry about my bad english.
>>>>>
>>>>> greetings
>>>>>
>>>>> Manuel
>>>>>         
>>>>       
>>>     
>>
>>
>>   
>
>