On 2026-06-02 11:02, Gabriel Goller wrote: > On 01.06.2026 17:15, Lukas Sichert wrote: >> In a non-full-mesh OpenFabric setup, nodes may need to relay traffic >> between peers that are not directly connected. This requires forwarding >> ipv6 packets between fabric bridges. With the addition of >> 'force_forwarding' to the Linux kernel, this can be done without >> enabling 'all.forwarding', which disables Router Advertisements. >> >> Configure fabric bridges with the required 'post-up'/'post-down' >> commands to enable 'force_forwarding'. >> >> Signed-off-by: Lukas Sichert <[email protected]> >> --- >> pve-rs/src/bindings/sdn/fabrics.rs | 10 ++++++++++ >> 1 file changed, 10 insertions(+) >> >> diff --git a/pve-rs/src/bindings/sdn/fabrics.rs >> b/pve-rs/src/bindings/sdn/fabrics.rs >> index f96b6b1..785b537 100644 >> --- a/pve-rs/src/bindings/sdn/fabrics.rs >> +++ b/pve-rs/src/bindings/sdn/fabrics.rs >> @@ -596,6 +596,16 @@ pub mod pve_rs_sdn_fabrics { >> writeln!(interface, "\tlink-type {link_type}")?; >> } >> writeln!(interface, "\tip-forward 1")?; >> + if cidr.is_ipv6() { >> + writeln!( >> + interface, >> + "\tpost-up echo 1 > >> /proc/sys/net/ipv6/conf/{name}/force_forwarding" >> + )?; >> + writeln!( >> + interface, >> + "\tpost-down echo 0 > >> /proc/sys/net/ipv6/conf/{name}/force_forwarding" >> + )?; >> + } >> >> Ok(interface) >> } > > The bgp fabric also needs force_forwarding AFAIK. @Hannes?
yes, we also need it there, same thing > > Also I just noticed on the bgp fabric we put ipv6 addresses in ifupdown2 inet > blocks (instead of inet6) -- shouldn't cause any problems though.
