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releases:21.02:notes-21.02.0-rc1 [2021/04/20 20:25] – Updated Highlights haukereleases:21.02:notes-21.02.0-rc1 [2021/04/27 15:19] – [Increased minimum hardware requirements: 8 MB flash, 64 MB RAM] zorun
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-====== OpenWrt 21.02.0-rc1 - First Release Candidate - 21 April 2021 ======+====== OpenWrt 21.02.0-rc1 - First Release Candidate - 26 April 2021 ======
  
 <code> <code>
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 /* Uncomment when the release is still work-in-progress */ /* Uncomment when the release is still work-in-progress */
-{{page>meta:infobox:attention_wiprelease&noheader&nofooter&noeditbtn}}+/* {{page>meta:infobox:attention_wiprelease&noheader&nofooter&noeditbtn}} */
  
 The OpenWrt Project is a Linux operating system targeting embedded devices.   The OpenWrt Project is a Linux operating system targeting embedded devices.  
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 the help of the sysupgrade utility which will also attempt to preserve the  the help of the sysupgrade utility which will also attempt to preserve the 
 configuration. A configuration backup is advised nonetheless when upgrading to  configuration. A configuration backup is advised nonetheless when upgrading to 
-OpenWrt 21.02.+OpenWrt 21.02. (see "Upgrading" below). 
 + 
 +Get OpenWrt Firmware at: https://downloads.openwrt.org/releases/21.02.0-rc1/
  
-Get OpenWrt Firmware at: https://downloads.openwrt.org/releases/ 
  
 ===== Highlights in OpenWrt 21.02.0-rc1 =====  ===== Highlights in OpenWrt 21.02.0-rc1 ===== 
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 development for about one and a half year. development for about one and a half year.
  
 +/*
 +This OpenWrt release includes support for WPA3 for most devices and HTTPS client and server support in the default images. This size increase makes it impossible to use OpenWrt 21.02 on any devices with less than 8 MB of flash. It also introduces significant changes to Ethernet switch configuration by changing from ''swconfig'' to DSA for several targets.
 +*/
  
-Highlights of this release since the previous OpenWrt 19.07 version are:+==== WPA3 support included by default ==== 
 + 
 +WPA3 was already supported in 19.07 but it was not provided by the default set of packages in OpenWrt images. 
 + 
 +With 21.02, all packages necessary to provide WPA3 are installed by default in OpenWrt images. 
 + 
 +==== TLS and HTTPS support included by default ==== 
 + 
 +TLS support is now provided by default in OpenWrt images including the trusted CA certificates from Mozilla. It means that ''wget'' and ''opkg'' now support fetching resources over HTTPS out-of-the-box. 
 +The ''opkg'' download server is accessed through HTTPS by default. 
 +OpenWrt switched from mbed TLS to wolfSSL as the default SSL library, mbed TLS and OpenSSL are still available and can be installed manually.  
 + 
 +/* LuCI does not use https by default */ 
 + 
 +==== Initial DSA support ==== 
 + 
 +DSA stands for [[https://www.kernel.org/doc/html/latest/networking/dsa/dsa.html|Distributed Switch Architecture]] and is the Linux standard to deal with configurable Ethernet switches. 
 + 
 +OpenWrt 21.02 comes with initial support for DSA, which replaces the ''swconfig'' system that OpenWrt was using up until now. 
 +Not all targets have been ported: some devices still use ''swconfig'' while some devices already switched to DSA. 
 + 
 +This is a significant change to how switch ports and VLANs are managed. As such, sysupgrade will not be able to convert existing ''swconfig'' configuration to DSA configuration (see "Upgrading" below). 
 + 
 +/* FIXME: add link to OpenWrt DSA documentation */ 
 + 
 +The following targets are using a switch managed with DSA in OpenWrt 21.02: 
 +  * [[:docs:techref:targets:ath79]] (only TP-Link TL-WR941ND) 
 +  * [[:docs:techref:targets:bcm4908]] 
 +  * [[:docs:techref:targets:gemini]] 
 +  * [[:docs:techref:targets:kirkwood]] 
 +  * [[:docs:techref:targets:mediatek]] (most boards) 
 +  * [[:docs:techref:targets:mvebu]] 
 +  * [[:docs:techref:targets:octeon]] 
 +  * [[:docs:techref:targets:ramips]] (mt7621 subtarget only) 
 +  * [[:docs:techref:targets:realtek]] 
 + 
 +==== Increased minimum hardware requirements: 8 MB flash, 64 MB RAM ==== 
 + 
 +Due to new features being introduced and the general size increase of the Linux kernel, devices now need at least 8 MB of flash and 64 MB of RAM to run a default build of OpenWrt. 
 +More flash space is recommended for extensibility, see [[:supported_devices:864_warning|8/64 warning]] 
 + 
 +It is still possible to build custom OpenWrt images (e.g. using the [[docs:guide-user:additional-software:imagebuilder|ImageBuilder]]) that may fit devices with 4 MB of flash or 32 MB of RAM. 
 +However, the level of functionality will be reduced and there is no guarantee to stability. 
 +See [[supported_devices:openwrt_on_432_devices|OpenWrt on 4/32 devices]] for more details and guidance. 
 + 
 +==== New hardware targets ==== 
 + 
 +A new [[:docs:techref:targets:realtek]] target has been added, which is often found in managed switches. As a result, it is now possible to run OpenWrt on devices with a significant number of Ethernet ports. 
 +See [[:toh:views:toh_standard_all?dataflt[0]=target_%3Drealtek|supported devices for realtek]]. 
 + 
 +In addition, new [[:docs:techref:targets:bcm4908]] and [[:docs:techref:targets:rockchip]] targets have been added. 
 + 
 +Support for many new boards was added to the existing targets. 
 + 
 +==== Dropped hardware targets ==== 
 + 
 +The [[:docs:techref:targets:ar71xx]] target was deprecated in OpenWrt 19.07 and has been gradually replaced by [[:docs:techref:targets:ath79]], see [[:docs:techref:targets:ar71xx-ath79|ar71xx-ath79 migration]]. 
 + 
 +With OpenWrt 21.02, the [[:docs:techref:targets:ar71xx]] has now been removed and users must use [[:docs:techref:targets:ath79]] instead. 
 +If you are still running with the [[:docs:techref:targets:ar71xx]] target, it is recommended to reinstall OpenWrt 21.02 from scratch.  Users already on the [[:docs:techref:targets:ath79]] target can use sysupgrade to upgrade to OpenWrt 21.02. 
 + 
 +Other targets were also removed: [[:docs:techref:targets:cns3xxx]], [[:docs:techref:targets:rb532]] and [[:docs:techref:targets:samsung]]. 
 + 
 +==== ASLR activated ==== 
 + 
 +Network exposed user space applications are linked as position-independent executable (PIE) to allow full Address Space Layout Randomization (ASLR) support. This makes it harder for attackers to exploit OpenWrt. See [[docs:guide-developer:security#hardening_build_options|Hardening build options]] for more details.  
 + 
 +==== Kernel with container support ==== 
 + 
 +Multiple Linux kernel compile options, needed for Linux Containers (LXC) and procd-ujail are activated by default for most targets. 
 +This allows to use LXC and ujail with the normal release builds. 
 + 
 +==== SELinux support ==== 
 + 
 +It is possible to compile OpenWrt with SELinux support. This is currently not activated by default. 
 + 
 +==== Core components update ==== 
 + 
 +Core components have the following versions in 21.02.0-rc1:
  
   * Updated toolchain:   * Updated toolchain:
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   * Updated Linux kernel   * Updated Linux kernel
     * 5.4.111 for all targets     * 5.4.111 for all targets
-  * Network userland:+  * Network:
     * hostapd 2020-06-08, dnsmasq 2.84, dropbear 2020.81     * hostapd 2020-06-08, dnsmasq 2.84, dropbear 2020.81
 +    * cfg80211/mac80211 from kernel 5.10.16
 +    * wireguard backport from upstream Linux kernel
   * System userland:   * System userland:
     * busybox 1.33.0     * busybox 1.33.0
-  * Platform and Driver Support 
-    * Dropped ar71xx, cns3xxx, rb532 and samsung target 
-    * Added bcm4908, realtek and rockchip target 
-  * Web interface: 
-    *  
  
-Known issues:+In addition to the listed applications, many others were also updated. 
 + 
 +===== Upgrading to 21.02.0-rc1 =====  
 + 
 +Sysupgrade can be used to upgrade a device from 19.07 to 21.02, and configuration will be preserved in most cases. 
 + 
 +:!: Sysupgrade from 18.06 to 21.02 is not supported. 
 + 
 +:!: There is no migration path for targets that switched from swconfig to DSA. In that case, sysupgrade will refuse to proceed with an appropriate error message:\\  
 +''Image version mismatch. image 1.1 device 1.0 Please wipe config during upgrade (force required) or reinstall. Config cannot be migrated from swconfig to DSA Image check failed'' 
 + 
 +:!: The default root file system partition size changed for targets/devices relying on booting from mass storage (HDD, USB flash, SD card, etc.), so MBR will change and any additional partition will be deleted when sysupgrading. 
 + 
 +==== Known issues ==== 
 + 
 +  * DSA support is new and might not be complete or fully working 
 +  * The LuCI web interface has no support for DSA yet 
 +  * LuCI writes unnecessary IPv6 RA options to /etc/config/dhcp if the user edits interface's DHCP settings. This could prevent client IPv6 connectivity. 
 +    * Update luci-mod-network to git-21.107.58557 or later to fix this problem
  
 +===== Final notes =====
  
 As always, a big thank you goes to all our active package maintainers,  As always, a big thank you goes to all our active package maintainers, 
  • Last modified: 2021/05/17 22:22
  • by zorun