[Kea-users] pefdhcp help

[Nicolas Javier Pantazis]

Hello Francis, good morning. I have resolved the issue, scouring through
the logs I found a legend that read something like "Kea dropped package
because it is Unicast" so I investigated the options of perfdhcp and
reformulated how I call the script.

Before: [root at geek njp]# /opt/kea/sbin/perfdhcp -6 -e address-only
2001:db8:beef:55:2
After:  [root at geek njp]# /opt/kea/sbin/perfdhcp -6 -l eth0

It works now but I still do not completely understand why the client was
sending  packages on unicast to the server and not responding.

Thank you for everything


On Fri, Sep 8, 2017 at 11:21 AM, Francis Dupont <fdupont at isc.org> wrote:

> Nicolas Javier Pantazis writes:
> > Hello Francis, good morning. Thank you for the reply, they do match here
> is
> > the output of the dhcpdump:
> >
> > 19:11:48.300621 IP6 2001:db8:beef:55::3.dhcpv6-client >
> > 2001:db8:beef:55::2.dhcpv6-server: dhcp6 solicit
>
> => and lsof? Kea won't listen on 2001:db8:beef:55::2 by default.
>
> > The issue is very strange that is why I need your help. The strange thing
> > is that perfdhcp worked perfectly for ipv4.
>
> => DHCPv4 uses (by default, you can change the service socket type)
> a BPF/LPF/etc socket, DHCPv6 uses standard UDP.
>
> Regards
>
> Francis Dupont <fdupont at isc.org>
>
> > > Can you check solicits are sent to an address the server is listen to?
> > > (you should have the destination address in your dump, for the server
> > > lsof displays open file (including socket) details).
> > > If not match, you should modify the perfdhcp argument or the Kea server
> > > config (cf interface configuration in DHCPv4 server guide).
>
> PS: you can have a kernel filter (ip6tables on Linux) which drops
> incoming packets. Usually tcpdump/wireshark/etc can see them but
> they are not delivered to the server.
>



-- 
Nicolas Javier Pantazis

---------- __o
-------- _`\<,_      "The bike wants to go fast!   and brakes are death!"
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