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pppoe ipv6 PD

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  pppoe ipv6 PD basti <mailinglist@unix-solution.de> - 2023-09-04 22:00 +0200
    Re: pppoe ipv6 PD Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-09-06 08:30 +0200
      Re: pppoe ipv6 PD Marco <mm@dorfdsl.de> - 2023-09-06 09:40 +0200
        Re: pppoe ipv6 PD basti <mailinglist@unix-solution.de> - 2023-09-06 20:10 +0200
          Re: pppoe ipv6 PD Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-09-07 10:30 +0200
            Re: pppoe ipv6 PD basti <mailinglist@unix-solution.de> - 2023-09-07 10:40 +0200
              Re: pppoe ipv6 PD Anssi Saari <anssi.saari@debian-user.mail.kapsi.fi> - 2023-09-07 14:00 +0200
                Re: pppoe ipv6 PD basti <mailinglist@unix-solution.de> - 2023-09-07 14:40 +0200

#261481 — pppoe ipv6 PD

Hello,

I have switch my network config from ifup to systemd-networkd.

IPv4 is working well but IPv6 is broken now.

In the past I used dhcpcd to delegate the ipv6 prefix to my LAN 
interface. It seems not working with systemd.

On my PPP interface I get an IPv4 and a IPv6 Address.

On my LAN interface I have to to set:

[Network]
IPv6SendRA=yes
DHCPv6PrefixDelegation=yes

When this is the LAN interface is up but

root@s920:~# networkctl
IDX LINK     TYPE     OPERATIONAL SETUP
   1 lo       loopback carrier     unmanaged
   2 enp1s0f0 ether    routable    configuring
...
   4 enp1s0f1 ether    routable    configured
...
  81 ppp0     ppp      routable    unmanaged

and I get no IPv6 Address here.

enp1s0f0 is LAN
enp1s0f1 connect to modem

dhcpcd and radvd are disabled, I think systemd should to that with the 
config above?

LAN interface without IPv6SendRA and DHCPv6PrefixDelegation in config

root@s920:~# networkctl
IDX LINK     TYPE     OPERATIONAL SETUP
   1 lo       loopback carrier     unmanaged
   2 enp1s0f0 ether    routable    configured
...

Can someone give me I tip how it should work?

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#261518

basti <mailinglist@unix-solution.de> writes:

> Hello,
>
> I have switch my network config from ifup to systemd-networkd.
>
> IPv4 is working well but IPv6 is broken now.
>
> In the past I used dhcpcd to delegate the ipv6 prefix to my LAN
> interface. It seems not working with systemd.
>
> On my PPP interface I get an IPv4 and a IPv6 Address.
>
> On my LAN interface I have to to set:
>
> [Network]
> IPv6SendRA=yes
> DHCPv6PrefixDelegation=yes

That should be enough but I don't really know how pppoe works, I've only
used IPv6 with tunneling, 6rd and 6in4 with the late route48.org.

There seems to be quite a lot of discussion in systemd issue #481 here:
https://github.com/systemd/systemd/issues/481, maybe that's of some help?

With 6rd I have also specified these two on the LAN side but I don't know if
they're actually needed. Also I have IPForward=yes on the WAN interface.

[Network]
IPv6AcceptRA=no

[DHCPPrefixDelegation]
UplinkInterface=enp1s0

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#261521

Am 06.09.2023 09:24 schrieb Anssi Saari:

> That should be enough but I don't really know how pppoe works, I've
> only used IPv6 with tunneling, 6rd and 6in4 with the late route48.org.

With PPP IPv6CP (RFC 2472 is being used.
It negotiates a 64 bit interface identifier to create the link-local
address.
The rest is being done with router advertisement and optionally with
DHCPv6.

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#261534

Am 06.09.23 um 09:37 schrieb Marco:
> Am 06.09.2023 09:24 schrieb Anssi Saari:
> 
>> That should be enough but I don't really know how pppoe works, I've
>> only used IPv6 with tunneling, 6rd and 6in4 with the late route48.org.
> 
> With PPP IPv6CP (RFC 2472 is being used.
> It negotiates a 64 bit interface identifier to create the link-local
> address.
> The rest is being done with router advertisement and optionally with
> DHCPv6.
> 

I get it working.
Some options are renamed in different systemd versions. I use 252.
FYI.

root@s920:/etc/systemd/network# cat 60-ppp.network
[Match]
Type=ppp

[Network]
IPv6AcceptRA=yes
DHCP=ipv6

root@s920:/etc/systemd/network# cat enp1s0f0.network
[Match]
Name=enp1s0f0

[Network]
IPv6SendRA=yes
IPv6AcceptRA=no
DHCPPrefixDelegation=yes

[IPv6SendRA]
EmitDNS=no
EmitDomains=no

enp1s0f0 is my LAN interface and I don't want to use the DNS Server of 
my ISP.

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#261538

basti <mailinglist@unix-solution.de> writes:

> Am 06.09.23 um 09:37 schrieb Marco:
>> Am 06.09.2023 09:24 schrieb Anssi Saari:
>> 
>>> That should be enough but I don't really know how pppoe works, I've
>>> only used IPv6 with tunneling, 6rd and 6in4 with the late route48.org.
>> With PPP IPv6CP (RFC 2472 is being used.
>> It negotiates a 64 bit interface identifier to create the link-local
>> address.
>> The rest is being done with router advertisement and optionally with
>> DHCPv6.
>> 
>
> I get it working.

What did you change to make it work though?

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#261539

On 07.09.23 10:27, Anssi Saari wrote:
> basti <mailinglist@unix-solution.de> writes:
> 
>> Am 06.09.23 um 09:37 schrieb Marco:
>>> Am 06.09.2023 09:24 schrieb Anssi Saari:
>>>
>>>> That should be enough but I don't really know how pppoe works, I've
>>>> only used IPv6 with tunneling, 6rd and 6in4 with the late route48.org.
>>> With PPP IPv6CP (RFC 2472 is being used.
>>> It negotiates a 64 bit interface identifier to create the link-local
>>> address.
>>> The rest is being done with router advertisement and optionally with
>>> DHCPv6.
>>>
>>
>> I get it working.
> 
> What did you change to make it work though?
> 

My changes where attached in my last mail. Did you seen it?
Have a look at the mailing archive:

https://lists.debian.org/debian-user/2023/09/msg00157.html

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#261547

basti <mailinglist@unix-solution.de> writes:

> My changes where attached in my last mail. Did you seen it?
> Have a look at the mailing archive:
>
> https://lists.debian.org/debian-user/2023/09/msg00157.html

No, you posted only your new versions so I can't know what you
actually changed. You posted originally that you have:

[Network]
IPv6SendRA=yes
DHCPv6PrefixDelegation=yes

On the LAN side. And now you have:

[Match]
Name=enp1s0f0

[Network]
IPv6SendRA=yes
IPv6AcceptRA=no
DHCPPrefixDelegation=yes

[IPv6SendRA]
EmitDNS=no
EmitDomains=no

So was it IPv6AcceptRA=no that fixed it? Or something else? 

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#261550

On 07.09.23 13:56, Anssi Saari wrote:
> basti <mailinglist@unix-solution.de> writes:
> 
>> My changes where attached in my last mail. Did you seen it?
>> Have a look at the mailing archive:
>>
>> https://lists.debian.org/debian-user/2023/09/msg00157.html
> 
> No, you posted only your new versions so I can't know what you
> actually changed. You posted originally that you have:
> 
> [Network]
> IPv6SendRA=yes
> DHCPv6PrefixDelegation=yes
> 
> On the LAN side. And now you have:
> 
> [Match]
> Name=enp1s0f0
> 
> [Network]
> IPv6SendRA=yes
> IPv6AcceptRA=no
> DHCPPrefixDelegation=yes
> 
> [IPv6SendRA]
> EmitDNS=no
> EmitDomains=no
> 
> So was it IPv6AcceptRA=no that fixed it? Or something else?
> 
I only have post the relevant options, so you need all of them, 
depending on you environment. I don't know if you want to use the DNS 
Server of your ISP.

For more info's about the options see 'man systemd.network'

You also need to accept RA on the ppp interface and start a dhcpv6 
client there, if your ISP distribute IPv6 via dhcp.

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