Re: [PATCH docs 4/4] sdn: drop global IPv6 forwarding workaround from OpenFabric docs

[Gabriel Goller <g.goller@proxmox.com>]

On 01.06.2026 17:15, Lukas Sichert wrote:
> OpenFabric fabrics with IPv6 need forwarding on transit nodes so packets
> can be relayed between peers that are not directly connected.
> 
> Drop the old recommendation to enable host-wide
> net.ipv6.conf.all.forwarding from the documentation. The generated fabric
> interface configuration now handles the required forwarding setup, so the
> manual global forwarding workaround is no longer needed.
> 
> Signed-off-by: Lukas Sichert <l.sichert@proxmox.com>
> ---
>  pvesdn.adoc | 18 +++---------------
>  1 file changed, 3 insertions(+), 15 deletions(-)
> 
> diff --git a/pvesdn.adoc b/pvesdn.adoc
> index d20a0eb..ac7240c 100644
> --- a/pvesdn.adoc
> +++ b/pvesdn.adoc
> @@ -605,22 +605,10 @@ Notes on IPv6
>  ^^^^^^^^^^^^^
>  
>  IPv6 is currently only usable on OpenFabric fabrics. These IPv6 Fabrics need
> -global IPv6 forwarding enabled on all nodes contained in the fabric. Without
> +IPv6 forwarding enabled on all transit nodes contained in the fabric. Without
>  IPv6 forwarding, non-full-mesh fabrics won't work because the transit nodes
> -don't forward packets to the outer nodes. Currently there isn't an easy way to
> -enable IPv6 forwarding per-interface like with IPv4, so it has to be enabled
> -globally. This can be accomplished by appending this line:
> -
> -----
> -post-up sysctl -w net.ipv6.conf.all.forwarding=1
> -----
> -
> -to a fabric interface in the `/etc/network/interfaces` file. This will enable
> -IPv6 forwarding globally once that interface comes up. Note that this affects
> -how your interfaces handle automatic IPv6 setup (SLAAC), Neighbour
> -Advertisements, Router Solicitations, and Router Advertisements. More details
> -here: https://www.kernel.org/doc/Documentation/networking/ip-sysctl.txt under
> -`net.ipv6.conf.all.forwarding`.
> +don't forward packets to the outer nodes. IPv6 fowarding is enabled per default
> +on the necessary interfaces.
>  
>  [[pvesdn_openfabric]]
>  OpenFabric
> -- 

I'd mention here somewhere that `force_forwarding` is used (and maybe link to
the kernel docs).