Stuart Henderson @ 2016-01-30T23:01:54 +0100: > On 2016-01-30, LÉVAI Dániel <[email protected]> wrote: > > Hi! > > > > My ISP recently enabled ipv6 on their network, and started sending > > router advertisements (offering a /64 prefix) on their pppoe end. So now > > I have an autoconf'd v6 address on my pppoe0 device (yay!), and I wish > > to set my in-home devices a v6 address each. [...] > You aren't supposed to have addresses within the same /64 on more than > one interface. > > The normal method is that you get an address for the PPP interface using > SLAAC autoconf (as you have now), and request one or more *additional* /64s > using DHCPv6-PD (prefix delegation) - one per interface. The DHCPv6 client > assigns to "downstream" (client-facing) interfaces from this assignment, > and you would use rtadvd to advertise the prefix (and possibly other > information) to clients. > > There is no software in OpenBSD base to handle prefix delegation. > I recommend "dhcpcd" from packages and I've added a pkg-readme with a > minimal setup to handle just this (it is also a full-featured DHCP client > for v4, but I'm personally only using it for v6). Unlike some alternatives > it is actively maintained upstream by a responsive developer.
Thanks for the infos! I was trying out wide-dhcpv6 because I read everywhere that that is *the thing!*. So I've installed dhcpcd, rewritten the config. from the pkg-readme, and got this: re1: IAID <> pppoe0: IAID 00:00:00:01 pppoe0: IAID 00:00:00:02 pppoe0: no useable IA found in lease pppoe0: dhcp6_readlease: /var/db/dhcpcd-pppoe0.lease6: No such process pppoe0: soliciting a DHCPv6 lease athn0: IAID <> athn1: IAID <> pppoe0: ADV 2a01:36d:300:<>::/64 from fe80::5dd9:bcc7:cbab:8bb8 pppoe0: REPLY6 received from fe80::5dd9:bcc7:cbab:8bb8 re1: adding address 2a01:36d:300:<1>::1/72 athn0: preferring 2a01:36d:300:<1>::1/72 on re1 athn1: preferring 2a01:36d:300:<1>::1/72 on re1 pppoe0: renew in 302400 seconds, rebind in 483840 seconds pppoe0: adding reject route to 2a01:36d:300:<>::/64 via ::1 athn0: adding route to 2a01:36d:300:<1>::/72 forked to background, child pid 346 '<>' being stuff that I really don't know if they're sensitive... But the <1> parts were the same, and the other ones seems like part of the NIC's MAC addresses. So it has indeed added the prefix to re1, but refused the athns, because re1 had already had the same prefix? I was trying out some combinations of the `ia_pd' option in a futile effort to just see what happens, but it didn't fix it, just broke it in other ways; I only managed to assign addresses to either one of the interfaces, but not all of them. Do I understand it correctly, that this should delegate each interface a /72, while leaving pppoe0's autoconf[privacy]'d addresses intact? BTW, is there a difference between writing 'inet6 autoconf' or 'rtsol' in /etc/hostname.pppoe0? Daniel -- LÉVAI Dániel PGP key ID = 0x83B63A8F Key fingerprint = DBEC C66B A47A DFA2 792D 650C C69B BE4C 83B6 3A8F
