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@geek njp]# /opt/kea/sbin/perfdhcp -6 -e address-only 2001:db8:beef:55:2 After: [root@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 <[email protected]> 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 <[email protected]> > > > > 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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