From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [IPv6:2a01:7e0:0:424::9]) by lore.proxmox.com (Postfix) with ESMTPS id 7FD531FF13C for ; Thu, 25 Jun 2026 11:53:34 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id E5DB7B988; Thu, 25 Jun 2026 11:53:33 +0200 (CEST) Message-ID: <81850371-dab2-4ac3-85a0-43478d2b020c@proxmox.com> Date: Thu, 25 Jun 2026 11:53:28 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH perl-rs v3 3/5] fabrics: openfabric: enable force_forwarding for ipv6 transit traffic To: pve-devel@lists.proxmox.com References: <20260619154017.167720-1-l.sichert@proxmox.com> <20260619154017.167720-4-l.sichert@proxmox.com> Content-Language: en-US From: Stefan Hanreich In-Reply-To: <20260619154017.167720-4-l.sichert@proxmox.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-SPAM-LEVEL: Spam detection results: 0 AWL 0.594 Adjusted score from AWL reputation of From: address BAYES_00 -1.9 Bayes spam probability is 0 to 1% DMARC_MISSING 0.1 Missing DMARC policy KAM_DMARC_STATUS 0.01 Test Rule for DKIM or SPF Failure with Strict Alignment SPF_HELO_NONE 0.001 SPF: HELO does not publish an SPF Record SPF_PASS -0.001 SPF: sender matches SPF record URIBL_BLOCKED 0.001 ADMINISTRATOR NOTICE: The query to URIBL was blocked. See http://wiki.apache.org/spamassassin/DnsBlocklists#dnsbl-block for more information. [fabrics.rs] Message-ID-Hash: R7Q2S3DGCP4K62N4MDSZ7SBVDVIBXHA2 X-Message-ID-Hash: R7Q2S3DGCP4K62N4MDSZ7SBVDVIBXHA2 X-MailFrom: s.hanreich@proxmox.com X-Mailman-Rule-Misses: dmarc-mitigation; no-senders; approved; loop; banned-address; emergency; member-moderation; nonmember-moderation; administrivia; implicit-dest; max-recipients; max-size; news-moderation; no-subject; digests; suspicious-header X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: On 6/19/26 5:40 PM, 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 > --- > 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")?; Do we need to set ip6-forward here as well? It does get set for the BGP fabric. > + 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) > }