From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) by lore.proxmox.com (Postfix) with ESMTPS id 4F86A1FF13B for ; Wed, 03 Jun 2026 16:30:36 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id 99B6DE379; Wed, 3 Jun 2026 16:30:11 +0200 (CEST) From: Lukas Sichert To: pve-devel@lists.proxmox.com Subject: [PATCH docs v2 5/5] sdn: drop global iv6 forwarding workaround from OpenFabric docs Date: Wed, 3 Jun 2026 16:29:13 +0200 Message-ID: <20260603142921.91174-6-l.sichert@proxmox.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: <20260603142921.91174-1-l.sichert@proxmox.com> References: <20260603142921.91174-1-l.sichert@proxmox.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Bm-Milter-Handled: 55990f41-d878-4baa-be0a-ee34c49e34d2 X-Bm-Transport-Timestamp: 1780496933949 X-SPAM-LEVEL: Spam detection results: 0 AWL 0.323 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 Message-ID-Hash: F3YYLC77MXIBUI7VPG7NJOKEZG7KXO2E X-Message-ID-Hash: F3YYLC77MXIBUI7VPG7NJOKEZG7KXO2E X-MailFrom: l.sichert@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 CC: Lukas Sichert X-Mailman-Version: 3.3.10 Precedence: list List-Id: Proxmox VE development discussion List-Help: List-Owner: List-Post: List-Subscribe: List-Unsubscribe: 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 --- 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