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Date: Mon, 27 Jul 2026 10:21:19 +0200
Message-Id: <DK97HJ4VM8U0.1VCD7RAK79WKI@proxmox.com>
Subject: Re: [PATCH perl-rs v3 3/5] fabrics: openfabric: enable
 force_forwarding for ipv6 transit traffic
From: "Lukas Sichert" <l.sichert@proxmox.com>
To: "Stefan Hanreich" <s.hanreich@proxmox.com>,
 <pve-devel@lists.proxmox.com>
References: <20260619154017.167720-1-l.sichert@proxmox.com>
 <20260619154017.167720-4-l.sichert@proxmox.com>
 <81850371-dab2-4ac3-85a0-43478d2b020c@proxmox.com>
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On 2026-06-25 11:53, Stefan Hanreich <s.hanreich@proxmox.com> wrote:

> On 6/19/26 5:40 PM, Lukas Sichert wrote:

>> diff --git a/pve-rs/src/bindings/sdn/fabrics.rs b/pve-rs/src/bindings/sd=
n/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")?;
>
> Do we need to set ip6-forward here as well? It does get set for the BGP
> fabric.

The forwarding flag is not necessary if force_forwarding is enabled to
forward packages. But the forwarding flag is currently set by ifupdown2
anyways in ifupdown2/addons/address.py:892, inside _set_bridge_forwarding()=
.

>
>> +        if cidr.is_ipv6() {
>> +            writeln!(
>> +                interface,
>> +                "\tpost-up echo 1 > /proc/sys/net/ipv6/conf/{name}/forc=
e_forwarding"
>> +            )?;
>> +            writeln!(
>> +                interface,
>> +                "\tpost-down echo 0 > /proc/sys/net/ipv6/conf/{name}/fo=
rce_forwarding"
>> +            )?;
>> +        }
>> =20
>>          Ok(interface)
>>      }