[Kea-users] pefdhcp help

Nicolas Javier Pantazis nicolasjavierp at gmail.com
Thu Sep 7 22:26:09 UTC 2017


First of all I would like to thank you as a citizen of the world for
offering such professional open source software.

Now my issue I have 2 pc's connected with a cross cable, with connectivity
between them using ipv6 both have installed kea 1.2.0 with log4cplus-2.0.0
and openssl writing the leases to a mem file. One of these pc's is designed
to be the dhcp server (alias mozo 2001:db8:beef:55::2 or 10.0.0.2) and the
other only uses the perfdhcp tool to stress test the dhcp server (alias
geek 2001:db8:beef:55::3 or 10.0.0.3). My goal is to establish a statefull
dhcpv6 environment.

I successfully completed the stress test using perfdhcp with ipv4, but for
some reason when i start the ipv6 stress test i get the following result:

[root at geek njp]# /opt/kea/sbin/perfdhcp -6 -e address-only -L 546
2001:db8:beef:55::2
Running: perfdhcp -6 -e address-only -L 546 2001:db8:beef:55::2
***Rate statistics***
Rate: 0 4-way exchanges/second
***Statistics for: SOLICIT-ADVERTISE***
sent packets: 404679
received packets: 0
drops: 404679

Delay summary unavailable! No packets received.

***Statistics for: REQUEST-REPLY***
sent packets:
received packets: 0
drops: 0

Delay summary unavailable! No packets received.

Server side I ran a dhcpdump and found out that the client (geek) sent the
packages and that the server (mozo) is receiving them but the dhcp server
does not respond to the clients multiple solicits, example of dhcpdump
server side:
19:11:48.300472 IP6 2001:db8:beef:55::3 > ff02::1:ff00:2: ICMP6, neighbor
solicitation, who has 2001:db8:beef:55::2, length 32
19:11:48.300531 IP6 2001:db8:beef:55::2 > 2001:db8:beef:55::3: ICMP6,
neighbor advertisement, tgt is 2001:db8:beef:55::2, length 32
19:11:48.300621 IP6 2001:db8:beef:55::3.dhcpv6-client >
2001:db8:beef:55::2.dhcpv6-server: dhcp6 solicit
19:11:48.300635 IP6 2001:db8:beef:55::3.dhcpv6-client >
2001:db8:beef:55::2.dhcpv6-server: dhcp6 solicit
19:11:48.300645 IP6 2001:db8:beef:55::3.dhcpv6-client >
2001:db8:beef:55::2.dhcpv6-server: dhcp6 solicit
The leases file is empty and the same issue occurs with isc-dhcp-server
(dhcpd6). Just in case i disabled ip6tables in both machines and SELinux.
Both pc's are running centos 6.9 and the server acts as a RA.

I am currently finishing college and this is a crucial part of my thesis,
any help in this mater would be greatly appreciated. I can provide the
config files via email if you wish.

Thank you for everything

-- 
Nicolas Javier Pantazis

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