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SONiC_202006_Release_Notes
This document captures the new features added and enhancements done on existing features/sub-features for the SONiC 202006 release.
Branch : https://github.com/Azure/sonic-buildimage/tree/202006
Image : https://sonic-jenkins.westus2.cloudapp.azure.com/ (Example - Image for Broadcom based platforms is here)
| Feature | Version |
|---|---|
| Linux kernel version | linux_4.9.0-11-2 (4.9.189-3+deb9u2) |
| SAI version | SAI v1.5.1 |
| FRR | 7.2 |
| LLDPD | 0.9.6-1 |
| TeamD | 1.28-1 |
| SNMPD | 5.7.3+dfsg-1.5 |
| Python | 3.6.0-1 |
| syncd | 1.0.0 |
| swss | 1.0.0 |
| radvd | 2.17-2~bpo9+1 |
| isc-dhcp | 4.3.5-2 (PR2946 ) |
| sonic-telemetry | 0.1 |
| redis-server/ redis-tools | 5.0.3-3~bpo9+2 |
- Kernel upgraded from 4.9.110-3deb9u6 (SONiC Release 201904) to 4.9.168-1+deb9u5 in this SONiC release. Change log: https://tracker.debian.org/media/packages/l/linux/changelog-4.9.168-1deb9u5
- Docker upgraded from 18.09.2~3-0~debian-stretch to 18.09.8~3-0~debian-stretch. Change log: https://docs.docker.com/engine/release-notes/#18098
DPKG caching framework provides the infrastructure to cache the sonic module/target .deb files into a local cache by tracking the target dependency files.SONIC build infrastructure is designed as a plugin framework where any new source code can be easily integrated into sonic as a module and that generates output as a .deb file.This provides a huge improvement in build time and also supports the true incremental build by tracking the dependency files.
Pull Requests : 3292, 4117, 4425
This feature provides bulk routes and next hop group members as coded in the PR mentioned below.
Pull Requests : 1238
This document describes a means (framework) for an application executed inside a container to securely request the execution of an operation ("action") by the host OS.This framework is intended to be used by the SONiC management and telemetry containers, but can be extended for other application containers as well.
Refer HLD document and below mentioned PR's for more details.
Pull Requests : 4840
This feature provides change in kernel version. By changing the kernel ABI from version 6 to version 6-2, this will allow to disable the kernel ABI check which Debian performs at the very end of the kernel build.
Pull Requests : 145, 4711
Ports can be broken out to different speeds with various lanes in most HW today. However, on SONiC, the port breakout modes are hard-coded in the profiles and only loaded at initial time. In case we need to have a new port breakout mode, we would potentially need a new image or at least need to restart services which would impact the traffic of the box on irrelevant ports. The feature is to address the above issues.
Refer HLD document and below mentioned PR's for more details.
Pull Requests : 4235, 3910, 1242, 1219, 1151, 1150, 1148, 1112, 1085, 766, 72, 859, 767, 765, 3912, 3911, 3909, 3907, 3891, 3874, 3861, 3730
Quality of Service (QoS) scheduling and shaping features enable better service to certain traffic flows.Queue scheduling provides preferential treatment of traffic classes mapped to specific egress queues. SONiC supports SP, WRR, and DWRR scheduling disciplines.Queue shaping provides control of minimum and maximum bandwidth requirements per egress queue for more effective bandwidth utilization. Egress queues that exceed an average transmission rate beyond the shaper max bandwidth will stop being serviced. Additional ingress traffic will continue to be stored on the egress queue until the queue size is exceeded which results in tail drop.
Refer HLD document and below mentioned PR's for more details.
Pull Requests : 1296, 991
A modern network switch is a sophisticated equipment which consists of many auxiliary components which are responsible for managing different subsystems (e.g., PSU/FAN/QSFP/EEPROM/THERMAL) and providing necessary interfaces (e.g., I2C/SPI/JTAG).Basically these components are complex programmable logic devices with it's own HW architecture and software. It is very important to always have the latest recommended software version to improve device stability, security and performance. In order to make software update as simple as possible and to provide a nice user frindly interface for various maintenance operations (e.g., install a new FW or query current version) we might need a dedicated FW utility.
Refer HLD document and below mentioned PR's for more details.
Pull Requests : 4764, 4758, 941, 942, 87, 82
This change adds support to build dockers using buster as base.sonic-mgmt-framework docker is updated to build using buster as base.
Pull Requests : 4671, 4727, 4726, 4665, 4515, 4598, 4529, 4480
This feature describes the high level design details on Port/Port-channel mirroring support, dynamic session management, ACL rules can continue to use port/ERSPAN sessions as the action, Configuration CLI for mirror session.
Refer HLD document and below mentioned PR's for more details.
Pull Requests : 1314, 936
When an interface is enabled with "proxy_arp", the same is enabled in the kernel. ASIC ARP packet action is also updated to trap these packets to CPU in those interfaces.
Refer HLD Document for more details.
Pull Requests : 617
This is an initial version of spytest framework and first set of test scripts for 202006 release.
Refer HLD Document for more details.
Pull Requests : 1533
Thermal control daemon has been added to monitor the temperature of devices (CPU, ASIC, optical modules, etc) and the running status of fan. It retrieves the switch device temperatures via platform APIs and raises alarms when the high/low thresholds are hit.It also stores temperature values fetched from sensors and thermal device running status to the DB.
Refer HLD Document for more details.
Pull Requests : 73, 777, 49, 3949,832
Please find the list of API's classified along the newly added SAI features. For further details on SAI API please refer SAI_1.6.3 Release Notes
| S.No | Feature |
|---|---|
| 1 | MACSEC |
| 2 | System Port API |
SONiC community would like to thank all the contributors from various companies and the individuals who has contributed for the release. Special thanks to the major contributors - Microsoft, Broadcom, DellEMC, Mellanox, Alibaba, Linkedin, Nephos & Aviz.
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