[Dnsmasq-discuss] ipv6 slaac or stateless - No address or no address range available
Simon Kelley
simon at thekelleys.org.uk
Mon Feb 27 21:22:51 UTC 2023
On 27/02/2023 20:10, Eric Fahlgren wrote:
>
> On Mon, Feb 27, 2023 at 8:15 AM Simon Kelley <simon at thekelleys.org.uk
> <mailto:simon at thekelleys.org.uk>> wrote:
>
>
> On 25/02/2023 16:19, Daniel via Dnsmasq-discuss wrote:
> > dhcp-option=tag:computer6,option6:3,fd99:1234:beef:cafe::2
> > dhcp-option=tag:computer6,option6:6,fd99:1234:beef:cafe::1
> > dhcp-option=tag:computer6,option6:ntp-server,fd99:1234:beef:cafe::2
>
> ...This all got a bit superseded
> when the IETF started defining options on the RA packets for the common
> configuration options.
>
>
> Sort of on-topic, but sort of tangential, how will dnsmasq interpret the
> above three settings?
>
> https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml <https://www.iana.org/assignments/dhcpv6-parameters/dhcpv6-parameters.xhtml>
>
> Does 'option6:3' translate this from DHCPv4's 'router' to an RA, or does
> it consider it to be DHCPv6 'OPTION_IA_NA'? Does the 'option6:6'
> (OPTION_ORO) use DHCPv4 dns-server semantics, or does it interpret it as
> DHCPv6 23, OPTION_DNS_SERVERs, or maybe even translate it to an RA RDNSS
> message???
>
> I can see how with 'option6:ntp-server' using the logical name it would
> use DHCPv6 56, OPTION_NTP_SERVER, but with the numerical 'option6:'
> values does it "do the right thing", or are those two option settings
> basically nonsense?
They are nonsense. If numeric option codes are used with option6 they
need to be numbers from the DHCPv6 option namespace.
Simon.
>
> Eric
>
>
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