Re: [DNA-BOF] Comments on draft-kumar-dna-reqmnt-ipv4-00.txt

[John Schnizlein <jschnizl@cisco.com>]

It was a deliberate design decision that DHCP would establish a lease
agreement between the client and server. One of the reasons was exactly
so that addresses would remain stable for configured periods despite
the dynamic allocation.

John

At 03:14 PM 10/24/2003, Alper Yegin wrote:

>>> This issue came up before. Can we really assume that an unexpired previous
>>> configuration is still available to the client despite it had disconnected
>>> from the link? Unless it is specifically prohibitied, I can imagine
>>> resources being released when the network detects that the client has
>>> disconnected.
>> 
>> A DHCP server doesn't know whether the client is disconnected or not, so
>> the resource release, if it occurs at all, would occur on the client.  A
>> client wanting to avoid unnecessary IP address acquisition would not
>> release the resources and so could keep using the IP address until lease
>> expiration.
>
>Couldn't a DHCP server act upon a "link-layer trigger" and release the
>resources? Unless this is prohibited in the DHCP specification, I suspect
>this can very well happen.