From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from firstgate.proxmox.com (firstgate.proxmox.com [212.224.123.68]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by lists.proxmox.com (Postfix) with ESMTPS id CB86774FC6 for ; Tue, 12 Oct 2021 12:56:38 +0200 (CEST) Received: from firstgate.proxmox.com (localhost [127.0.0.1]) by firstgate.proxmox.com (Proxmox) with ESMTP id BBC702B0E4 for ; Tue, 12 Oct 2021 12:56:38 +0200 (CEST) Received: from mailgw01.exchange.at (mailgw01.exchange.at [77.244.249.185]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by firstgate.proxmox.com (Proxmox) with ESMTPS id 7F78B2B0DB for ; Tue, 12 Oct 2021 12:56:37 +0200 (CEST) Received: from mailgw01.exchange.at (localhost.localdomain [127.0.0.1]) by mailgw01.exchange.at (Proxmox) with ESMTP id 89AB3101FFF for ; Tue, 12 Oct 2021 12:48:22 +0200 (CEST) Received: from EX3.ex16.local (ex3.ex16.local [10.0.117.23]) by mailgw01.exchange.at (Proxmox) with ESMTPS for ; Tue, 12 Oct 2021 12:48:22 +0200 (CEST) From: =?iso-8859-1?Q?VELARTIS_Philipp_D=FCrhammer?= To: 'Proxmox VE development discussion' Thread-Topic: BUG in vlan aware bridge Thread-Index: Ade/S/a5oqf07sdpT0G5nqfmnpicNQ== Date: Tue, 12 Oct 2021 10:48:22 +0000 Message-ID: <2b417bee43cb4484bcba66afc6076113@velartis.at> Accept-Language: de-AT, de-DE, en-US Content-Language: de-DE X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [10.0.117.132] Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-SPAM-LEVEL: Spam detection results: 0 BAYES_00 -1.9 Bayes spam probability is 0 to 1% 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 Subject: [pve-devel] BUG in vlan aware bridge X-BeenThere: pve-devel@lists.proxmox.com X-Mailman-Version: 2.1.29 Precedence: list List-Id: Proxmox VE development discussion List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 12 Oct 2021 10:56:38 -0000 HI, i am playing around since days because we have strange packet losses. Finally I can report following (Linux 5.11.22-4-pve, Proxmox 7, all devices= MTU 1500): Packet with sizes > 1500 without VLAN working well but at the moment they a= re Tagged they are dropped by the bond device. Netfilter (set to 1) always reassembles the packets when they arrive a brid= ge. But they don't get fragmented again I they are VLAN tagged. So the bond= device drops them. If the bridge is NOT Vlan aware they also get fragmente= d and it works well. Setup not working: tapX (tagged) <- -> vmbr0 <- - > bond0 Setup working: tapX (tagged) <- -> vmbr0 <- - > bond0 Setup also working: tapX < - - > vmbr0v350 < -- > bond0.350 < -- > bond0 Have you got any idea where to search? I don't understand who is in charge = of fragmenting packages again if they get reassembled by netfilter. (and wh= y it is not working with vlan aware bridges)