[Dnsmasq-discuss] Doing only RA and not DHCPv4

[Simon Kelley]

On 20/01/13 15:37, Gui Iribarren wrote:
> Hello again,
> i'm trying to use dnsmasq to send router advertisements over a
> ipv6-only tinc network.
>
> with this minimal config
> port=0
> dhcp-range=2a00:1508:1:f000::, 64, ra-only
> enable-ra
> log-dhcp
>
> and this interface
> 8: tinc6:<BROADCAST,MULTICAST,UP,LOWER_UP>  mtu 1280 qdisc pfifo_fast
> state UNKNOWN qlen 1000
>      link/ether de:8e:ae:56:a3:ba brd ff:ff:ff:ff:ff:ff
>      inet6 2a00:1508:1:f000::1/64 scope global
>         valid_lft forever preferred_lft forever
>      inet6 fe80::dc8e:aeff:fe56:a3ba/64 scope link
>         valid_lft forever preferred_lft forever
>
> i get this in the logs, (and no RAs at all)
> Jan 20 15:25:23 chato dnsmasq[20890]: started, version 2.65 DNS disabled
> Jan 20 15:25:23 chato dnsmasq[20890]: compile time options: IPv6
> GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack
> Jan 20 15:25:23 chato dnsmasq-dhcp[20890]: IPv6 router advertisement enabled
>
>
> if i add dhcpv4 over that interface as well, RAs start working
>
> port=0
> dhcp-range=192.168.10.10,192.168.10.50,12h
> dhcp-range=2a00:1508:1:f000::, 64, ra-only
> enable-ra
> log-dhcp
>
> 10: tinc6:<BROADCAST,MULTICAST,UP,LOWER_UP>  mtu 1280 qdisc pfifo_fast
> state UNKNOWN qlen 1000
>      link/ether c2:f8:25:72:9f:0f brd ff:ff:ff:ff:ff:ff
>      inet 192.168.10.1/24 scope global tinc6
>      inet6 2a00:1508:1:f000::1/64 scope global
>         valid_lft forever preferred_lft forever
>      inet6 fe80::c0f8:25ff:fe72:9f0f/64 scope link
>         valid_lft forever preferred_lft forever
>
> Jan 20 15:26:38 chato dnsmasq[21813]: started, version 2.65 DNS disabled
> Jan 20 15:26:38 chato dnsmasq[21813]: compile time options: IPv6
> GNU-getopt DBus i18n IDN DHCP DHCPv6 no-Lua TFTP conntrack
> Jan 20 15:26:38 chato dnsmasq-dhcp[21813]: IPv6 router advertisement enabled
> Jan 20 15:26:38 chato dnsmasq-dhcp[21813]: DHCP, IP range
> 192.168.10.10 -- 192.168.10.50, lease time 12h
> Jan 20 15:26:42 chato dnsmasq-dhcp[21813]: RTR-ADVERT(tinc6) 2a00:1508:1:f000::
> Jan 20 15:26:53 chato dnsmasq-dhcp[21813]: RTR-ADVERT(tinc6) 2a00:1508:1:f000::
> Jan 20 15:27:12 chato dnsmasq-dhcp[21813]: RTR-ADVERT(tinc6) 2a00:1508:1:f000::
>
> Is this expected? Maybe i'm going too far, trying to drop dual-stack?
> Or more simply, i'm missing something in my setup?
>

My guess is that something which should be initialised is not, unless 
via the DHCPv4 code path. As a start, please could you try again with 
the latest 2.66test release, since much if the DHCP initialisation code 
has been completely overhauled there?


Cheers,

Simon.