You should be able to configure DHCPv6 in dnsmasq to handle larger
prefixes. You can't do SLAAC address allocation that way, because it
depends on a 64-bit prefix and a 64-bit EUI-64 id, but DHCP works.
Something like
dhcp-range=<start-address>,<end-address>,92
The prefix length MUST match the prefix length configured in the local
inerface.
Thanks for the response i try
I make the modification on /var/lib/libvirt/dnsmasq/reseau.conf and kill up the
process
so my dnsmasq.conf is :
##WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE
##OVERWRITTEN AND LOST. Changes to this configuration should be made using:
## virsh net-edit default-ipv6
## or other application using the libvirt API.
##
## dnsmasq conf file created by libvirt
strict-order
domain-needed
domain=root.belguise.eu
expand-hosts
local=/root.belguise.eu/
pid-file=/var/run/libvirt/network/default-ipv6.pid
except-interface=lo
bind-dynamic
interface=virbr0
dhcp-range=192.168.122.2,192.168.122.254
dhcp-no-override
dhcp-range=2a00:c70:1:xxx:xxx:xxx:8106:901,2a00:c70:1:xxx:xxx:xxx:8106:f01,97
dhcp-leasefile=/var/lib/libvirt/dnsmasq/default-ipv6.leases
dhcp-lease-max=1790
dhcp-hostsfile=/var/lib/libvirt/dnsmasq/default-ipv6.hostsfile
addn-hosts=/var/lib/libvirt/dnsmasq/default-ipv6.addnhosts
#enable-ra
mybridge is on same prfix
root@root:~# ifconfig virbr0
virbr0 Link encap:Ethernet HWaddr 52:54:00:89:5a:8e
inet adr:192.168.122.1 Bcast:192.168.122.255 Masque:255.255.255.0
adr inet6: 2a00:c70:1:xxx:xxx:xxx:8106:ffff/97 Scope:Global
and I got
Nov 16 09:53:51 root dnsmasq-dhcp[2371]: no address range available for DHCPv6 r
equest via virbr0
if I change the prefix in /64 i see an RTR-ADVERT in log
not with /97 (i'd try with /112 too)
I think that dhclient on my vm's send an RTR-SOLLICIT whish is the origin of
the message and don't send DHCP stuff since there is no reponse to is
RTR-SOLLICIT
On my vm (debian wheezy) my /etc/network/interfaces is
iface eth0 inet6 dhcp
accept-ra 0
autoconf 0
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