Yes, you are right. This issue has nothing to do with pppd, it is/was an OpenWRT misconfiguration. BTW, it works now. Thank you for your suggestion! Best regards, Levente On Wed, Jun 26, 2019 at 2:45 PM James Carlson <carlsonj@xxxxxxxxxxxxxxx> wrote: > > On 06/26/19 07:30, Levente wrote: > > Dear maintainer, > > > > > > I am struggling with IPv6 over PPP on Linux. The situation is that I > > have a 3G modem, when I plug it in to the USB on my Debian box, > > everything works as expected, I have IPv6 address from the provider, > > and I am happy. But how? > > There may be problems with this trace, possibly indicating 3G-specific > authentication issues, but if your only question is about IPv6, the > answer is very simple. PPP doesn't negotiate global scope addresses in > IPv6. It does link-local only. Global scope addresses come from either > ICMPv6 Router Advertisements, DHCPV6 address assignments, or static > configuration. > > > Please note that in the logs, I can't see that global scope address, > > and I don't know how the IPv6CP assigns this address to the interface. > > How is this done? > > Some other protocol. IPV6CP is not involved. > > > And when I plug the same modem to an OpenWRT box, I don't get the > > global scope address, only the link-local address. Is this some PPP > > specific problem, or there might be some IPv6 autoconfiguration magic > > happening in the background? I don't think so, because that address > > corresponds to a statically allocated address of the provider. > > > > lev@mercury:~$ host 2a00:1110:135:4594:303e:582f:ea95:aa10 > > 0.1.a.a.5.9.a.e.f.2.8.5.e.3.0.3.4.9.5.4.5.3.1.0.0.1.1.1.0.0.a.2.ip6.arpa > > domain name pointer > > 2A00111001354594303E582FEA95AA10.mobile.pool.telekom.hu. > > > > Could you help me out what is going on here, and why can't I get a > > global scope address on the OpenWRT? I'm sure it is an OpenWRT issue, > > but need help tracing it. > > My guess would be that the OpenWRT box doesn't have IPv6 routing enabled > and isn't doing RAs. That's just a guess. I don't believe the issues > you're having here have anything to do with PPP. > > -- > James Carlson 42.703N 71.076W <carlsonj@xxxxxxxxxxxxxxx>
