[PATCH docs v2 5/5] sdn: drop global iv6 forwarding workaround from OpenFabric docs

[Lukas Sichert <l.sichert@proxmox.com>]

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 | 21 +++++----------------
 1 file changed, 5 insertions(+), 16 deletions(-)

diff --git a/pvesdn.adoc b/pvesdn.adoc
index d20a0eb..fed9664 100644
--- a/pvesdn.adoc
+++ b/pvesdn.adoc
@@ -604,23 +604,12 @@ behavior and proper source address selection throughout the fabric.
 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 is currently only usable on OpenFabric and BGP fabrics. These IPv6 Fabrics
+need 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 using the force_forwarding flag. More details here:
+docs.kernel.org/networking/ip-sysctl.html
 
 [[pvesdn_openfabric]]
 OpenFabric
-- 
2.47.3