[Dnsmasq-discuss] Need some indications to patch dnsmasq to bypass /64 limit
'llo My hosting provider give me only a /96 ipv6 adress and I xant put on my host some vm with libvirt and dhcp. I got the message "no dhcpv6 range available ..." since the bridge adress have a prefix > 64. Since the dnsmasq.conf is build by libvirt I think that the solution is to path dnsmasq. But dnsmasq seems tom e quite complex what are the place to patch dhcp6.c and radvd.c ? ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Need some indications to patch dnsmasq, to bypass /64 limit
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=,,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 virbr0Link 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:/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 ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] Need some indications to patch dnsmasq, to exclusive) to bypass /64 limit
Le 21/11/2013 13:46, Simon Kelley - si...@thekelleys.org.uk a écrit : Ok that's work ... the problem was ... linvirt doesn't put prefix on dhcp-range when i made modification on my /var/lib/libvirt/dnsmas/default-ipv6.conf file and send the kill -HUp to the process dnsmasq did not réinterpret the modified dhcp-range instruction. If i kill the process and launch /usr/sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/default-ipv6.conf things are ok. thanks for your help i'll make a report to libvirt guy "DNSMASQ need prefix in dhcp-range for dhcpv6" On 16/11/13 09:08, dnsmasq.bertra...@dfgh.net wrote: 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=,,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:/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 What version of dnsmasq are you using? I just tried this with the latest code, and didn't see this error. Cheers, Simon. ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
[Dnsmasq-discuss] DhcpV6 how to send prefixlen and default route
Hello, Alwas some problems with my /97 prefix ... on the client side dhclient say the prefix is /64 the router advertissement is ok with ridsc6 i see that i have /97 prefix in dhcp no option for prefixlen seems possible Is a trick exists ? ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] DhcpV6 how to send prefixlen and default route (dnsmasq: to exclusive)
Le 23/11/2013 15:06, dnsmasq.bertra...@dfgh.net a écrit : Hello, Alwas some problems with my /97 prefix ... on the client side dhclient say the prefix is /64 dhclient hardcode the 64 prefix len :( ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] DhcpV6 how to send prefixlen and default route (dnsmasq: to exclusive) (dnsmasq: to exclusive)
Le 23/11/2013 23:01, dnsmasq.bertra...@dfgh.net a écrit : Le 23/11/2013 15:06, dnsmasq.bertra...@dfgh.net a écrit : Hello, Alwas some problems with my /97 prefix ... on the client side dhclient say the prefix is /64 dhclient hardcode the 64 prefix len :( Hello finally my configuration dhcpv6 work fine with dibbler-client on debian. We juste need to add inactive-mode strict-rfc-no-routing at the begin of /etc/dibbler/client.conf an no inet6 configuration in /etc/network/interfaces ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] IPv6 host file syntax
> Message du 17/12/13 19:01 > De : "Shixiong Shang - sparkofwisdom.cl...@gmail.com" > A : dnsmasq-discuss@lists.thekelleys.org.uk > Copie à : > Objet : [Dnsmasq-discuss] IPv6 host file syntax (dnsmasq: to exclusive) > > Hi, expert: > > I am using dnsmasq as DHCPv6 server and I created host file for my IPv6 DHCP > range. The first field is DUID calculated by MAC, followed by hostname, and > then IPv6 address. > > 00:03:00:06:fa:16:3e:03:63:36,host-2001-db8-3--1.openstacklocal,2001:db8:3::1 > 00:03:00:06:fa:16:3e:95:5f:6a,host-2001-db8-3--2.openstacklocal,2001:db8:3::2 > 00:03:00:06:fa:16:3e:0c:29:d6,host-2001-db8-3--f816-3eff-fe0c-29d6.openstacklocal,2001:db8:3::f816:3eff:fe0c:29d6 > > However, I cannot find any document to verify whether the above syntax is > correct. Would you please clarify? > > Thanks! > > Shixiong > Hello, I'm not an expert ;-) but i use libvirt and i had problem with dhcpv6 by default the dhcp clients use duid-llt begining with 00:01:00:01 My solution (because libvirt doesn't accept mac adresse in ipv6 host) is to impose use of dibbler-client with in /etc/dibbler/client.conf: #modifications inactive-mode strict-rfc-no-routing duid-type duid-ll the dhcp-hostfile generated by libvirt is : root@root:~# more /var/lib/libvirt/dnsmasq/default-ipv6.hostsfile 52:54:00:4b:c2:02,192.168.122.2,vm1 52:54:00:4b:c2:03,192.168.122.3,vm2 52:54:00:4b:c2:04,192.168.122.4,vm3 52:54:00:4b:c2:05,192.168.122.5,vm4 52:54:00:4b:c2:06,192.168.122.6,vm5 52:54:00:4b:c2:07,192.168.122.7,vm6 52:54:00:4b:c2:08,192.168.122.8,vm7 52:54:00:4b:c2:09,192.168.122.9,vm8 id:00:03:00:01:52:54:00:4b:c2:02,vm1,[2a00:c70:1:xx:xx:xx:xx:101] id:00:03:00:01:52:54:00:4b:c2:03,vm2,[2a00:c70:1:xx:xx:xx:xx:201] cheers Bertrand ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
