[Kea-users] max-unacked-clients definition

[Darren Ankney]

Hi Kraishak,

If you are just testing, create logging configurations for all of the
categories listed here:
https://kea.readthedocs.io/en/kea-2.2.0/arm/logging.html#id3 and set
DEBUG and  debuglevel 99.  This will log all there is to log.  I
recommend setting up a different file for each category as there can
be a ridiculous amount of logs.

Thank you,

Darren Ankney

On Fri, Jun 23, 2023 at 8:22 AM Kraishak Mahtha <kraishak.edu at gmail.com> wrote:
>
> Hi Darren,
>
> However, it is still a tool-based test, right? I tried using the actual clients i.e from the laptops and tcpdump shows the time elapsed seconds are greater than 10 seconds.
>
> My major doubt or concern is why my packet/client is not considered as an unacked-client, or if it is a valid unacked-client is the kea-dhcp unable to increase its counter (do I need to add any config more to work as it expected?).
>
> Do we have any specific log file where I can check for this unacked-client thing?
>
> Thanks
> Kraishak
>
>
>
> On Fri, Jun 23, 2023 at 4:47 PM Darren Ankney <darren.ankney at gmail.com> wrote:
>>
>> Hello all,
>>
>> A better way to test this would be with perfdhcp
>> (https://kea.readthedocs.io/en/kea-2.2.0/man/perfdhcp.8.html) with
>> something like this:
>>
>> perfdhcp -4 -y 10 -Y 3600 -r 1 -R 5 -p 3700 -t 60 -l <interface>
>>
>> You'd need a linux install (virtual on your windows computer would be
>> fine as long as using bridged adapter of some kind) to install
>> perfdhcp which is part of Kea.  The relay agent should pick up and
>> forward (it should be broadcast, in any case, if your DHCP servers are
>> local).  In either case, both servers should see the packets.  When
>> you shut one of them down, the packets sent by perfdhcp will already
>> have increased secs field content.
>>
>> Thank you,
>>
>> Darren Ankney
>>
>> On Fri, Jun 23, 2023 at 6:23 AM Kevin P. Fleming
>> <lists.kea-users at kevin.km6g.us> wrote:
>> >
>> > On Fri, Jun 23, 2023, at 06:16, Kraishak Mahtha wrote:
>> >
>> > And also one last question, is it suggested to go with un-acked-clients value as zero both in hot-stand-by mode and load balance mode?
>> >
>> >
>> > As has been mentioned before, please read the Kea ARM carefully and thoroughly, especially the HA hook section. There is very specific and well-written guidance on when max-unacked-clients should be set to zero.
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