Mike Crowe <[email protected]> writes: > Does anyone happen to have a working configuration using Debian pppd to > connect to Zen Internet in the UK with working IPv6? It looks like IPv6 is > expected to run over the IPv4 PPPoE connection. IPv4 is all working fine.
I don't know anything about Zen, but I have configured the ISP end of a dual-stack PPP service many, many, many years ago. And as you've found, PPP supports IPv4 and IPv6 just fine over one single tunnel. > I added: > +ipv6 ipv6cp-use-ipaddr > to the provider file in /etc/ppp/peers and the pppd output looks promising: > > Apr 1 13:33:27 deneb pppd[117669]: rcvd [IPV6CP ConfReq id=0x1a <addr > fe80::827f:f8ff:fe74:b4f3>] > Apr 1 13:33:27 deneb pppd[117669]: sent [IPV6CP ConfAck id=0x1a <addr > fe80::827f:f8ff:fe74:b4f3>] > [...] > Apr 1 13:33:27 deneb pppd[117669]: rcvd [IPV6CP ConfAck id=0x1 <addr > fe80::4147:9ae5:df4d:be66>] > Apr 1 13:33:27 deneb pppd[117669]: local LL address > fe80::4147:9ae5:df4d:be66 > Apr 1 13:33:27 deneb pppd[117669]: remote LL address > fe80::827f:f8ff:fe74:b4f3 > > and I can ping the remote link-local address successfully. I see occasional > router advertisements, but they have a reachable time of 0ms. So, this looks good. > If I drop the "ipv6cp-use-ipaddr" then I get different link-local addresses > for both the local and remote, but the router advertisements from the new > remote still have a reachability time of 0ms. This shouldn't matter at all, as long as the other end accpts the interface-id you choose on your end. You could probably make it whatever you want. It's local to your ppp tunnel anyway. > I tried manually assigning an address from the WAN /64 that Zen gave me to > the ppp interface and setting the default route to the remote link-local > address, but I never got any responses from anything out on the real IPv6 > Internet. The other end could be expecting you to use the negotiated interface-id with that prefix. But I believe it's more likely that they expect you to use DHCPv6 for address configuration. Did you try that? It's quite possible that they support DHCPv6-PD, assigning you a larger prefix. Finding good DHCPv6 clients with PPP support used to be difficult (the one from ISC only worked on ethernet). I don't know the current status. One would hope that modern network managers like systemd-networkd or NetworkManager just works... > I'm starting to wonder whether Zen really did turn on IPv6 support on my > line correctly since I couldn't make it work with the router they sent me > either. That is of course possible. But I find it likely that they would have blocked the IPV6CP too then. Bjørn
