option 82. Change a MAC-address.

[DHCP-User Nick]

Lars Jacobsen wrote:
>
>>
>> Feb 27 11:37:13 helper dhcpd: DHCPDISCOVER from 00:dd:dd:dd:dd:a1 via 
>> 172.25.254.1: network optic: no free leases
>>
>> What I can do for quick release IP again? (Without checking a 
>> leases-file maybe?)
>>
>> I've decreased a max-lease-time to 30sec. All work, but i've got a 
>> many requests. It's not good.
>> How I can set max-lease-time to 1day and quick release IP for request 
>> from other MAC-address?
>>
>>
>> Thanks.
>> nick
>>
>
> Hi Nick
>
> Nice job on class matching and logging in your config.
> You are on the right track.
> But as long a lease is running the server has no way reclaim it and 
> assign it to another client - no matter if the client holding the 
> lease is not active. Your pool is only one IP thus the  no free lease 
> message. Only thing to do is wait until the lease expire and then the 
> server will reclaim the lease and lease it to the new client 
> (different MAC address). Or delete it from the lease database.
> If you lower the lease time then it wil happen quicker, but the price 
> is increased dhpc traffic (req/ack) as you have noticed.
>
> There has been some discussions on making the DHCPd able to assign 
> leases based on op. 82 circuit id /remote id (instead of client 
> identifier/MAC address), but so far this has not been supported. But 
> there has been some unofficial hacks doing it. Try search the list on 
> opt. 82 if you feel comfortable fiddling with the code ;-)
>
> Regards
>
> Lars
>
>
>
>
Thank you, Lars for good words for me ;-)!

I've found LDAP version only, but I would like to get patch without 
LDAP. Is this patch available?
 
nick