Re: [Dnsmasq-discuss] IPv6 Router Advertisements not working
Yes, one of my interfaces is fd01::1/64.
I just got it working actually. In my case I have a test lab setup with a
couple networks. The first is a smaller /24 with no ipv6 that is generally
accessible in my company. The second is a /16 using the 198.18/15 address
space for testing with the fd01::/64 ipv6 addressing. Originally I had two
dnsmasq configurations to provide DNS/DHCP (1 per network). When I switched
over to a single configuration with all the dhcp-option, dhcp-range
configurations including the network interface they should be applicable
to, things just started working. I am not sure why it helped but either way
I would rather have a single configuration anyways.
--
Matthew Keeler
On January 23, 2018 at 12:18:47, Erik Nordmark (nordm...@sonic.net) wrote:
On 01/22/2018 02:27 AM, Andy Hawkins wrote:
> Hi,
> In article <8534ac3c-30d0-095a-8bde-179bdbe8f...@thekelleys.org.uk>,
> Simon Kelley wrote:
>> Do you have an interface configured with an address in fd01::/64 ?
>
> Is this a requirement? radvd is able to send advertisements out on an
> interface that has no IPv6 address configured (indeed, I have been using
> this facility to automatically configure the interface that router
> advertisements are being sent on).
>
> Would be nice to be able to do the same with dnsmasq without having to
> manually configure the IPv6 address of the interface.
Andy,
I've run into this limitation as well, due to using the "no on-link
prefixes" option in neighbor discovery (meaning that I use dhcpv6 for
address assignment, and radvd doesn't advertise any onlink prefix).
This means I don't have a /64 prefix configured on any interface which
matches the range from which dnsmasq assigns IPv6 addresses.
My workaround is to remove the /64 check from dnsmasq (see below). I've
been meaning to discuss this on the list.
Erik
diff -r -u ../dnsmasq-orig/dnsmasq-2.75/src/option.c src/option.c
--- ../dnsmasq-orig/dnsmasq-2.75/src/option.c 2015-07-30
12:59:07.0 -0
700
+++ src/option.c 2017-06-13 15:14:58.109166818 -0700
@@ -2734,9 +2734,6 @@
ret_err(_("prefix length must be exactly 64 for subnet constru
ctors"));
}
- if (new->prefix < 64)
- ret_err(_("prefix length must be at least 64"));
-
if (!is_same_net6(&new->start6, &new->end6, new->prefix))
ret_err(_("inconsistent DHCPv6 range"));
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Re: [Dnsmasq-discuss] IPv6 Router Advertisements not working
On 01/22/2018 02:27 AM, Andy Hawkins wrote:
Hi,
In article <8534ac3c-30d0-095a-8bde-179bdbe8f...@thekelleys.org.uk>,
Simon Kelley wrote:
Do you have an interface configured with an address in fd01::/64 ?
Is this a requirement? radvd is able to send advertisements out on an
interface that has no IPv6 address configured (indeed, I have been using
this facility to automatically configure the interface that router
advertisements are being sent on).
Would be nice to be able to do the same with dnsmasq without having to
manually configure the IPv6 address of the interface.
Andy,
I've run into this limitation as well, due to using the "no on-link
prefixes" option in neighbor discovery (meaning that I use dhcpv6 for
address assignment, and radvd doesn't advertise any onlink prefix).
This means I don't have a /64 prefix configured on any interface which
matches the range from which dnsmasq assigns IPv6 addresses.
My workaround is to remove the /64 check from dnsmasq (see below). I've
been meaning to discuss this on the list.
Erik
diff -r -u ../dnsmasq-orig/dnsmasq-2.75/src/option.c src/option.c
--- ../dnsmasq-orig/dnsmasq-2.75/src/option.c 2015-07-30
12:59:07.0 -0
700
+++ src/option.c2017-06-13 15:14:58.109166818 -0700
@@ -2734,9 +2734,6 @@
ret_err(_("prefix length must be exactly 64 for subnet constru
ctors"));
}
- if (new->prefix < 64)
- ret_err(_("prefix length must be at least 64"));
-
if (!is_same_net6(&new->start6, &new->end6, new->prefix))
ret_err(_("inconsistent DHCPv6 range"));
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Re: [Dnsmasq-discuss] IPv6 Router Advertisements not working
Hi, In article <8534ac3c-30d0-095a-8bde-179bdbe8f...@thekelleys.org.uk>, Simon Kelley wrote: > Do you have an interface configured with an address in fd01::/64 ? Is this a requirement? radvd is able to send advertisements out on an interface that has no IPv6 address configured (indeed, I have been using this facility to automatically configure the interface that router advertisements are being sent on). Would be nice to be able to do the same with dnsmasq without having to manually configure the IPv6 address of the interface. Thanks Andy ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
Re: [Dnsmasq-discuss] IPv6 Router Advertisements not working
Do you have an interface configured with an address in fd01::/64 ? Cheers, Simon. On 15/01/18 18:03, Matthew Keeler wrote: > I setup a new vm running version 2.78 of dnsmasq. > > I have this in my config: > > enable-ra > dhcp-range=fd01::,ra-stateless,ra-names,64,24h > > According to running dnsmasq in the foreground with -d > > dnsmasq-dhcp: DHCPv6 stateless on fd01:: > dnsmasq-dhcp: DHCPv4-derived IPv6 names on fd01:: > dnsmasq-dhcp: router advertisement on fd01:: > dnsmasq-dhcp: IPv6 router advertisement enabled > > However I never see logs about sending router advertisements or > receiving router solicitations. I also confirmed they aren’t going out > with Wireshark. Are there any reasons why this wouldn’t work or does > anyone know what else I should look into to figure it out. > > -- > Matthew Keeler > > > > ___ > 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] IPv6 Router Advertisements not working
I setup a new vm running version 2.78 of dnsmasq. I have this in my config: enable-ra dhcp-range=fd01::,ra-stateless,ra-names,64,24h According to running dnsmasq in the foreground with -d dnsmasq-dhcp: DHCPv6 stateless on fd01:: dnsmasq-dhcp: DHCPv4-derived IPv6 names on fd01:: dnsmasq-dhcp: router advertisement on fd01:: dnsmasq-dhcp: IPv6 router advertisement enabled However I never see logs about sending router advertisements or receiving router solicitations. I also confirmed they aren’t going out with Wireshark. Are there any reasons why this wouldn’t work or does anyone know what else I should look into to figure it out. -- Matthew Keeler ___ Dnsmasq-discuss mailing list Dnsmasq-discuss@lists.thekelleys.org.uk http://lists.thekelleys.org.uk/mailman/listinfo/dnsmasq-discuss
