Regarding the dhcp lease time

[Murali Krishna]

Hi,

Before we tried to collect the packet captures. I would like to share some
information on the issue.
While analyzing the logs, it has been observed that the system time is
updated to very old time stamp(almost 5yrs back). From this point onwards
we are able to see that the huge lease value is getting updated in the
client lease file.

30566:Tue Apr 30 14:58:03 IST 2019

30804:Tue Apr 30 14:58:24 IST 2019

31042:Fri May  2 00:00:14 IST 2014

31280:Fri May  2 00:00:35 IST 2014

31531:Fri May  2 00:00:56 IST 2014

…

33379:Fri May  2 00:03:23 IST 2014

33643:Fri May  2 00:03:44 IST 2014

33907:Fri May  2 00:04:05 IST 2014

34171:Fri May  2 00:04:26 IST 2014

34435:Fri May  2 00:04:47 IST 2014

34699:Tue Apr 30 15:03:39 IST 2019

34963:Tue Apr 30 15:04:00 IST 2019


Even though the system time is updated to the current time, there was no
update to the client lease file.  client lease file is updated to the
correct value only after we restarted the client.


Thanks & Regards,

Muralikrishna CH

On Tue, Apr 16, 2019 at 10:32 PM Simon Hobson <dhcp1 at thehobsons.co.uk>
wrote:

> Sten Carlsen <stenc at s-carlsen.dk> wrote:
>
> > The server is configured with two times, max-lease-time and
> default-lease-time.
>
> Just to expend on that ...
> There is also min-lease-time.
>
> If the client specifies a desired lease time then the server will give
> that subject to min and max lease times.
> If the client does not ask for a specific lease time, then the default
> lease time is offered.
>
> As already mentioned, the first thing to do is look more closely at your
> packet captures. Check which devices the packets come from, and what's in
> them - particularly what options the client sends.
>
> _______________________________________________
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>


-- 




Thanks & Regards,
Muralikrishna CH
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