Hello list!
I'm running into an issue with a DHCPv6-only dnsmasq setup, on versions
2.76 and 2.79 from Debian. I'm trying to set a DHCPv6 range and use the
wide-dhcpv6-client to get my clients IPv6 addresses. Note that all IPv6
addresses use a fake prefix for anonymity.
I run dnsmasq with the following command (embedded in another daemon
normally, but run manually here for testing):
sudo /usr/sbin/dnsmasq \
--bogus-priv \
--no-hosts \
--dhcp-authoritative \
--filterwin2k \
--expand-hosts \
--domain=test \
--local=/test/ \
--log-facility=- \
--log-dhcp \
--keep-in-foreground \
--bind-interfaces \
--interface=br1002 \
--except-interface=lo \
--listen-address=2001:ffff:1111::1 \
--dhcp-range=::2,::ffff,constructor:br1002,24h
That `listen-address` is definitely bound to the server side:
6: br1002: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 8800 qdisc noqueue
state UP group default qlen 1000
link/ether xx:xx:xx:xx:xx:xx brd ff:ff:ff:ff:ff:ff
inet6 2001:ffff:1111::1/64 scope global
valid_lft forever preferred_lft forever
What's happening is my DHCPv6 requests come in fine, but the server
reports "no available addresses" even though I have what appears to be a
valid range of available addresses:
dnsmasq-dhcp[746253]: 12629722 available DHCP range: 2001:ffff:1111::2
-- 2001:ffff:1111::ffff
dnsmasq-dhcp[746253]: 12629722 client MAC address: 52:54:00:5c:f1:32
dnsmasq-dhcp[746253]: 12629722 DHCPSOLICIT(br1002)
00:01:00:01:23:7e:62:3a:52:54:00:5c:f1:31
dnsmasq-dhcp[746253]: 12629722 DHCPADVERTISE(br1002)
00:01:00:01:23:7e:62:3a:52:54:00:5c:f1:31 no addresses available
dnsmasq-dhcp[746253]: 12629722 tags: dhcpv6, br1002
dnsmasq-dhcp[746253]: 12629722 sent size: 14 option: 1 client-id
00:01:00:01:23:7e:62:3a:52:54:00:5c:f1:31
dnsmasq-dhcp[746253]: 12629722 sent size: 14 option: 2 server-id
00:01:00:01:23:83:8e:6b:52:54:00:14:c5:11
dnsmasq-dhcp[746253]: 12629722 sent size: 24 option: 13 status 2 no
addresses available
dnsmasq-dhcp[746253]: 626033 available DHCP range: 2001:ffff:1111::2 --
2001:ffff:1111::ffff
dnsmasq-dhcp[746253]: 626033 client MAC address: 52:54:00:5c:f1:32
dnsmasq-dhcp[746253]: 626033 DHCPREQUEST(br1002)
00:01:00:01:23:7e:62:3a:52:54:00:5c:f1:31
dnsmasq-dhcp[746253]: 626033 DHCPREPLY(br1002)
00:01:00:01:23:7e:62:3a:52:54:00:5c:f1:31 no addresses available
dnsmasq-dhcp[746253]: 626033 tags: dhcpv6, br1002
dnsmasq-dhcp[746253]: 626033 sent size: 14 option: 1 client-id
00:01:00:01:23:7e:62:3a:52:54:00:5c:f1:31
dnsmasq-dhcp[746253]: 626033 sent size: 14 option: 2 server-id
00:01:00:01:23:83:8e:6b:52:54:00:14:c5:11
dnsmasq-dhcp[746253]: 626033 sent size: 24 option: 13 status 2 no
addresses available
dnsmasq-dhcp[746253]: 626033 sent size: 16 option: 23 dns-server
2001:ffff:1111::1
From my understanding of the man page and the older thread "Using IPv6
DHCP"
(http://lists.thekelleys.org.uk/pipermail/dnsmasq-discuss/2012q3/006306.html),
this should be all I need to get a stateful DHCPv6 configuration. I've
also tried every combination of options I can come up with in the
`dhcp-range` config without success. Even if I set `static` mode and use
a `dhcp-host` option for my test host, I get the exact same "no
addresses available" message.
SLAAC works fine when I add `enable-ra`, and `ra-stateless` to
`dhcp-range`, but this configuration to hand out only IPv6 addresses
statefully never seems to work as described in that thread. The goal is
to have a fully stateful DHCPv6 server that IPv6-only clients can get
addresses from and, most importantly, update dnsmasq with their hostname
(hence why I'm not using SLAAC or `ra-stateless`). The very specific
binding config is due to me running a separate dnsmasq instance for each
of an arbitrary number of interfaces.
Can anyone offer any advice on what I might be doing wrong here?
Thanks,
Joshua M. Boniface
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