From patchwork Thu May 16 10:56:12 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leigh Brown X-Patchwork-Id: 13665998 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 3D718C25B7B for ; Thu, 16 May 2024 10:57:00 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.723127.1127717 (Exim 4.92) (envelope-from ) id 1s7Yn6-0000Cs-Ah; Thu, 16 May 2024 10:56:52 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 723127.1127717; Thu, 16 May 2024 10:56:52 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1s7Yn6-0000B5-5I; Thu, 16 May 2024 10:56:52 +0000 Received: by outflank-mailman (input) for mailman id 723127; Thu, 16 May 2024 10:56:50 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1s7Yn4-0007XN-Mn for xen-devel@lists.xenproject.org; Thu, 16 May 2024 10:56:50 +0000 Received: from doppler.solinno.uk (doppler.solinno.uk [81.2.106.178]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id fea2b9dd-1372-11ef-909d-e314d9c70b13; Thu, 16 May 2024 12:56:49 +0200 (CEST) Received: from folly.solinno.co.uk (folly.dyn.solinno.co.uk [192.168.2.135]) by doppler.solinno.uk (Postfix) with ESMTPSA id F1AB280079; Thu, 16 May 2024 11:56:48 +0100 (BST) Received: by folly.solinno.co.uk (Postfix, from userid 1000) id D064B20189; Thu, 16 May 2024 11:56:48 +0100 (BST) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: fea2b9dd-1372-11ef-909d-e314d9c70b13 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=solinno.co.uk; s=mail; t=1715857008; bh=BO2dM/EaQO5+8TZ0KmpaERvUueDUoaoFR9BWzwbr6DA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EQYwpQy7HufR+rblgxoXxtD7nZEfkOlkGVQDgC3TeiuRPjUzB7z/62j3xlKmXofmF iKGFI98OHiYvL6kqirsRH8k6pm7wwR0i9yCvk5PH9J4Ya0KizVGJwkV/L7I5MsKlil b1IzO1/efCBSRYf9AwW5GWqlIWCT76AK4/cMjlyc= From: Leigh Brown To: xen-devel@lists.xenproject.org Cc: Andrew Cooper , Anthony Perard , Jason Andryuk , Leigh Brown Subject: [PATCH v3 4/4] docs/misc: Example Linux bridge VLAN config Date: Thu, 16 May 2024 11:56:12 +0100 Message-Id: <20240516105612.15306-5-leigh@solinno.co.uk> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240516105612.15306-1-leigh@solinno.co.uk> References: <20240516105612.15306-1-leigh@solinno.co.uk> MIME-Version: 1.0 Add a new directory linux-bridge-vlan with example files showing how to configure systemd-networkd to support a bridge VLAN configuration. Signed-off-by: Leigh Brown --- docs/misc/linux-bridge-vlan/README | 68 ++++++++++++++++++++++ docs/misc/linux-bridge-vlan/br0.netdev | 7 +++ docs/misc/linux-bridge-vlan/br0.network | 8 +++ docs/misc/linux-bridge-vlan/enp0s0.network | 16 +++++ 4 files changed, 99 insertions(+) create mode 100644 docs/misc/linux-bridge-vlan/README create mode 100644 docs/misc/linux-bridge-vlan/br0.netdev create mode 100644 docs/misc/linux-bridge-vlan/br0.network create mode 100644 docs/misc/linux-bridge-vlan/enp0s0.network diff --git a/docs/misc/linux-bridge-vlan/README b/docs/misc/linux-bridge-vlan/README new file mode 100644 index 0000000000..9a048bca39 --- /dev/null +++ b/docs/misc/linux-bridge-vlan/README @@ -0,0 +1,68 @@ +Linux Xen Dom0 single bridge multiple VLAN configuration with systemd +===================================================================== + +Introduction +------------ + +This directory contains example files to be placed in /etc/systemd/network +to enable a single bridge with multiple VLAN support. + +The example is to support the scenario where the Xen host network interface +is connected to an Ethernet switch configured as a trunk port. Each domain +VIF can then be configured with one or more VLAN IDs, one of which will be +the PVID. + +The example files create a bridge device called br0, with a physical interface +called enp0s0. You will need to update this with your system's device name. + +Key points of the configuration are: + +1. In br0.netdev, VLANFiltering=on is set. This is required to ensure the + VLAN tags are handled correctly. If it is not set then the packets + from the VIF interfaces will not have the correct VLAN tags set. + +2. In br0.network, a system IPv4 address is configured that can be updated + according to your local network settings. + +3. In enp0s0.network, Bridge=br0 sets the bridge device to connect to. There + is also a [BridgeVLAN] section for each VLAN allowed on the external + interface. Note, if you want to create an internal VLAN private to the + host, do not include its VLAN ID in this file. + + +Domain configuration +-------------------- + +Add the vlan= keyword to the vif definition in the domain. The simplest +and most common example is a domain that wishes to connect to a single VLAN: + +vif = [ 'mac=xx:xx:xx:xx:xx:xx, bridge=br0, vlan=10' ] + +If you wish to configure a domain to route between two VLANs, you have two +options. Option 1 is to create multiple interfaces on different VLANs: + +vif = [ 'mac=xx:xx:xx:xx:xx:xx, bridge=br0, vlan=10', + 'max=xx:xx:xx:xx:xx:xx, bridge=br0, vlan=20' ] + +Alternatively, you can create single interface: + +vif = [ 'mac=xx:xx:xx:xx:xx:xx, bridge=br0, vlan=10p/20' ] + +In the domain, you would, for example, use enX0 for VLAN 10 and enX0.20 for +VLAN 20. + + +Hints and tips +-------------- + +You can run the following commands on dom0 or a driver domain: + +1. To check if vlan_filtering is enabled: + # cat /sys/devices/virtual/net//bridge/vlan_filtering + +2. To check the bridge port VLAN assignments: + # bridge vlan + +3. To check the vlan setting in the xenstore (dom0 only): + # xenstore-ls -f | grep 'vlan =' + diff --git a/docs/misc/linux-bridge-vlan/br0.netdev b/docs/misc/linux-bridge-vlan/br0.netdev new file mode 100644 index 0000000000..ae1fe487c3 --- /dev/null +++ b/docs/misc/linux-bridge-vlan/br0.netdev @@ -0,0 +1,7 @@ +[NetDev] +Name=br0 +Kind=bridge +MACAddress=xx:xx:xx:xx:xx:xx + +[Bridge] +VLANFiltering=on diff --git a/docs/misc/linux-bridge-vlan/br0.network b/docs/misc/linux-bridge-vlan/br0.network new file mode 100644 index 0000000000..b56203b66a --- /dev/null +++ b/docs/misc/linux-bridge-vlan/br0.network @@ -0,0 +1,8 @@ +[Match] +Name=br0 + +[Network] +DNS=8.8.8.8 +#Domains=example.com +Address=10.1.1.10/24 +Gateway=10.1.1.1 diff --git a/docs/misc/linux-bridge-vlan/enp0s0.network b/docs/misc/linux-bridge-vlan/enp0s0.network new file mode 100644 index 0000000000..6ee3154dfc --- /dev/null +++ b/docs/misc/linux-bridge-vlan/enp0s0.network @@ -0,0 +1,16 @@ +[Match] +Name=enp0s0 + +[Network] +Bridge=br0 + +# If Jumbo frames are required +#[Link] +#MTUBytes=9000 + +[BridgeVLAN] +VLAN=10 + +[BridgeVLAN] +VLAN=20 +