dhcpcd-discuss

Hi Nickolai

On 2015-09-22 02:23, Nickolai Dobrynin wrote:
> I am running dhcpcd-6.9, and I can't get
> IPv6 prefix delegation working. I have two interfaces:
> 'enp1s10' for WAN, 'wlp2s0' for LAN (and 'enp3s0'
> which is unused).
>
> At some point during boot, dhcpcd hangs, forks into
> background, and no prefix gets delegated to wlp2s0:
>
> Sep 22 02:35:26 dev: loaded udev
> Sep 22 02:35:26 enp3s0: adding address fe80::bd54:908d:64f5:41f0
> Sep 22 02:35:26 enp1s10: adding address fe80::7376:ac2d:a96a:6a6f
> Sep 22 02:35:26 wlp2s0: adding address fe80::608f:65e4:4fa2:b831
> Sep 22 02:35:26 enp3s0: waiting for carrier
> Sep 22 02:35:26 enp1s10: waiting for carrier
> Sep 22 02:35:26 wlp2s0: waiting for carrier
> Sep 22 02:35:26 wlp2s0: carrier acquired
> Sep 22 02:35:26 DUID 00:01:00:01:1d:7a:83:94:00:15:f2:d4:79:34
> Sep 22 02:35:26 wlp2s0: IAID 93:54:1d:3e
> Sep 22 02:35:26 wlp2s0: carrier lost
> Sep 22 02:35:26 wlp2s0: deleting address fe80::608f:65e4:4fa2:b831
> Sep 22 02:35:29 enp1s10: carrier acquired
> Sep 22 02:35:29 enp1s10: IAID 00:00:00:01
> Sep 22 02:35:29 enp1s10: rebinding lease of 192.168.2.107
> Sep 22 02:35:29 enp1s10: leased 192.168.2.107 for 1814400 seconds
> Sep 22 02:35:29 enp1s10: adding route to 192.168.2.0/24
> Sep 22 02:35:29 enp1s10: adding default route via 192.168.2.1
> Sep 22 02:35:30 enp1s10: soliciting an IPv6 router
> Sep 22 02:35:31 enp1s10: soliciting a DHCPv6 lease
> Sep 22 02:35:31 enp1s10: Router Advertisement from fe80::1
> Sep 22 02:35:31 enp1s10: adding address 
> 2003:56:ce64:dc90:a703:3afe:75fa:da67/64
> Sep 22 02:35:31 enp1s10: adding route to 2003:56:ce64:dc90::/64
> Sep 22 02:35:31 enp1s10: adding default route via fe80::1
> Sep 22 02:35:56 timed out
> Sep 22 02:35:56 forked to background, child pid 1776
> Sep 22 02:35:57 control command: dhcpcd -m 3 enp1s10
> Sep 22 02:35:58 wlp2s0: carrier acquired
> Sep 22 02:35:58 wlp2s0: adding address fe80::e92b:ce84:16b3:90c0
> Sep 22 02:35:58 wlp2s0: IAID 93:54:1d:3e
> Sep 22 02:35:58 wlp2s0: soliciting a DHCP lease
> Sep 22 02:36:08 wlp2s0: using IPv4LL address 169.254.43.159
> Sep 22 02:36:08 wlp2s0: adding route to 169.254.0.0/16
> Sep 22 02:36:08 wlp2s0: removing route to 169.254.0.0/16

Looks to me like you didn't receive any DHCPv6 reply, which is the 
reason why.
Can you verify this with a tcpdump?

> My dhcpcd.conf is:
>
> hostname
> duid
> persistent
> option rapid_commit
> option domain_name_servers, domain_name, domain_search, host_name
> option classless_static_routes
> option ntp_servers
> require dhcp_server_identifier
> slaac private
> nohook lookup-hostname
>
> # The stuff below was suggested by
> # 
> https://wiki.archlinux.org/index.php/IPv6#Prefix_delegation_.28DHCPv6-PD.29
> noipv6rs
> waitip 6
>
> interface enp1s10
> ipv6rs
> iaid 1
>
> #ia_pd 1 wlp2s0
> ia_pd 1/::/64 wlp2s0/0/64

Looks fine.
I'm going to guess it doesn't work either with the ia_pd 1 wlp2s0 line 
uncommented and the other commented out?

Roy