[Kea-users] max-unacked-clients definition

[Frey, Rick E]

The server needs to see its partner down before it will consider requests as un-acked and begin responding such requests.  If your standby server does not see the other server as partner-down, the requests are not tracked as un-acked even though they are not being processed by the primary server.  If you are testing failover, you’ll need to disrupt communication between servers so standby host sees primary as partner-down.  See previous thread<https://lists.isc.org/mailman/htdig/kea-users/2023-January/003794.html> on this topic.



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From: Kea-users <kea-users-bounces at lists.isc.org> on behalf of Kraishak Mahtha <kraishak.edu at gmail.com>
Date: Thursday, June 22, 2023 at 12:01 PM
To: Kevin P. Fleming <lists.kea-users at kevin.km6g.us>
Cc: kea-users at lists.isc.org <kea-users at lists.isc.org>
Subject: Re: [Kea-users] max-unacked-clients definition
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Hi Kevin,

Thanks for the confirmation, but I am not sure why those clients are not getting a lease and are not getting considered as un-acked clients, do you have any other pointers for me to check?

Thanks
Kraishak




On Thu, Jun 22, 2023 at 9:41 PM Kevin P. Fleming <lists.kea-users at kevin.km6g.us<mailto:lists.kea-users at kevin.km6g.us>> wrote:
On Thu, Jun 22, 2023, at 11:52, Kraishak Mahtha wrote:
Hi Kevin,
Thanks for the explanation. But in a few trials, the clients crossed more than 10 seconds  but still, I don't see a change and getting an acknowledgment or server getting updated partner-down,

I am attaching one of the tcpdump packets captured that I have saved. Can you please have a look? I am checking for the "Seconds elapsed" field in the DISCOVER packet. I hope that is correct, and correct me if I am wrong.

You are not wrong; the 'secs' field in those DISCOVER packets is well above 10 seconds. That client should be counted as 'unacked'.

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