(the following is on RHEL, Fedora, and CentOS clients; I'm not sure what behavior is on other platforms.)
First, a question about client behavior (i.e. not specific to dnsmasq): I noticed a long time ago that IPv4 clients configured for both static IP addresses and dhcp would discard the static IP addresses in favor of the one from dhcp. Likewise, I found the same behavior for IPv6 when checking it for this bug report: https://bugzilla.redhat.com/show_bug.cgi?id=1113983 This is different from IPv6 autoconf behavior - you can configure a static IP and set autoconf, and you will end up with both IP addresses. I don't see any reason why a client shouldn't behave the same with dhcp - just keep the static address and add the address from dhcp, and am thinking this is just a deficiency in the dhcp client implementation (in this case ISC dhclient). Is there anything in the DHCP standard that I'm overlooking that would preclude static + dhcp ( + autoconf) on the same interface from working? And now to a question about dnsmasq - libvirt uses dnsmasq for DNS, DHCP (v4 and v6), and RA. I've just noticed that when I enable dhcpv6, clients are no longer able to get an IPv6 via autoconf (i.e. when they're configured to only use autoconf). Is this expected, or a bug/configuration problem? This is my dnsmasq version: dnsmasq-2.72-3.fc21.x86_64 The dnsmasq commandline: /sbin/dnsmasq --conf-file=/var/lib/libvirt/dnsmasq/ipv6.conf --leasefile-ro --dhcp-script=/usr/libexec/libvirt_leaseshelper and ipv6.conf: strict-order domain=test.lainetest.org expand-hosts pid-file=/var/run/libvirt/network/ipv6.pid except-interface=lo bind-dynamic interface=virbr1 dhcp-range=192.168.123.2,192.168.123.254 dhcp-no-override dhcp-range=x:x:x:x::2,x:x:x:x::200 dhcp-lease-max=764 dhcp-hostsfile=/var/lib/libvirt/dnsmasq/ipv6.hostsfile addn-hosts=/var/lib/libvirt/dnsmasq/ipv6.addnhosts enable-ra This is the config file when there is no dhcp-range defined for the network: strict-order domain=test.lainetest.org expand-hosts pid-file=/var/run/libvirt/network/ipv6.pid except-interface=lo bind-dynamic interface=virbr1 dhcp-range=192.168.123.2,192.168.123.254 dhcp-no-override dhcp-lease-max=253 dhcp-hostsfile=/var/lib/libvirt/dnsmasq/ipv6.hostsfile addn-hosts=/var/lib/libvirt/dnsmasq/ipv6.addnhosts dhcp-range=x:x:x:x::1,ra-only (in this case, autoconf works correctly). _______________________________________________ Dnsmasq-discuss mailing list [email protected] http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
