Release Notes

These are the release notes for SONiC software version 202012 on NVIDIA® Mellanox Spectrum®-based switches. However, these release notes are simply an upstream version of the pure SONiC release available on GitHub.

Release Notes Update History

RevisionDateDescription
Rev 1.0April 20, 2021Initial release of these release notes.

SONiC General Support

SONiC Versions

BranchHashLocation
SONiC 202012https://github.com/Azure/sonic-buildimage/tree/202012

Package Content

This release is based on the SONiC 202012 sonic-buildimage hash. It contains the following components:

Switch ComponentsVersionAdditional Information
Mellanox Spectrum-3 Firmware30.2008.2416
Mellanox Spectrum-2 Firmware29.2008.2416
Mellanox Spectrum Firmware13.2008.2416
SDK4.4.2416SDK API can be found at: https://github.com/Mellanox/SwitchRouterSDK-interfaces
SAI1.18.1.0Mellanox SAI implementation can be found at: https://github.com/Mellanox/SAI-Implementation/tree/sonic2012 based on commit https://github.com/Mellanox/SAI-Implementation/commit/8dc2afd21ff6578cd0736b70aaa6ce5f1135265d
Mellanox Firmware Tools (MFT)4.16.0-105Release Notes
User Manual

Application Extensions

The following application extension was developed by Mellanox:

Application ExtensionVersionAdditional Information
What-Just-HappenedTBDFor further information, see What Just Happened.

Issues Fixed in this Version

This section provides only a list of bugs fixed only by Mellanox in this version.

Additional bugs reported are handled by both Mellanox and the community as part of the 202012 release. For additional information, please refer to the Azure GitHub site.

RM #Issue

2045019

Description: Removing a VLAN which still has a member port results in failure, although no error indication is provided in the CLI.

Keywords: VLAN

Discovered in Version: SONiC 201911

Fixed in Version: SONiC 202012

2071829

Description: The validation of the config portchannel member add command is missing when adding a port that has already been a member of another portchannel interface.

Keywords: portchannel

Discovered in Version: SONiC 201911

Fixed in Version: SONiC 202012

2198406

Description: In rare cases, high pre-FEC is experienced on MMA1B00-C100D optic cables (post-FEC is clean).

Keywords: SN4600C, Cables

Discovered in Version: SONiC 201911_MUR3

Fixed in Version: SONiC 202012

2229399

Description: Tx settings of the line card in SN3800 fail eye measurement.

Keywords: Spectrum-2, SN3800, Tx settings

Discovered in Version: SONiC 201911_MUR5

Fixed in Version: SONiC 202012

2135522

Description: When sending a control packet that is larger than the port MTU, the control-sending queue will get stuck.

Keywords: Driver, MTU

Discovered in Version: SONiC 201911_MUR5

Fixed in Version: SONiC 202012

2407901

Description:CLI commands used to enable PFCWD do not work.

Keywords: PFCWD, CLI

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2435816

Description: Interface PortChannel cannot get an assigned IP when 80 PortChannel RIF are defined.

Keywords: IP assignment, PortChannel, RIF

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2447853

Description: What Just Happened consumes almost 100% CPU usage while not reading data.

Keywords: What-Just-Happened

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2367239

Description: snmpagent allocates (hardcoded) only 4 lanes for each transceiver. Therefore, the SNMP query returns the sensors of only the first 4 lanes of a QSFP-DD (400GbE) cable which has 8 lanes.

Keywords: SNMP MIB

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2384299

Description: On occasion, when using Dell QSFP28 copper cable in 40G (4x10G) split mode, the link goes down.

Keywords: SN4700, Cables, Split

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2407901

Description: The command config pfcwd start --action drop ports all detection-time 400 --restoration-time 400 fails due to invalid options: ports and detection-time.

Keywords: PFCWD

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2409755

Description: On rare cases, when reading the wrong critical thermal thresholds of a transceiver may lead to software thermal shutdown resulting in system restart.

Keywords: ISSU

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2431486

Description: When a switch is rebooted with locked optical transceivers in split mode, the firmware may get stuck.

Keywords: Optical Transceivers, Split Mode

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2355323

Description: When moving the port-status of two or more ingress ports up or down, congestion egress events send events of threshold crossing without an actual reason, though the congestion histogram remains unaffected.

Keywords: Telemetry

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2407915

Description: In Spectrum-3 while using optical cable MFS1S50-H003E in split 4x1 mode in PAM4, when one port is toggled, all three other ports go down.

Keywords: Ethernet, Spectrum-3, PAM4, Optic Cables

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2405266

Description: On SN3800 systems, when the port is a member of a LAG, after a warm boot and port toggle on the peer-side, the port remains down.

Keywords: Ethernet, Spectrum-3, DAC

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2176790

Description: On rare occasions packets loss may be experienced on SN3800 due to signal integrity issues.

Keywords: Spectrum-2, SN3800, BER

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

1883103

Description: When connecting SN3700 at 200GbE to Ixia K400, Ixia receives CRC errors.

Keywords: Spectrum-2, SN3700, Ixia, CRC

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2320854

Description: When working in 400GbE, deleting the headroom configuration (changing buffer size to zero) on the fly may cause continual packet drops.

Keywords: Speed, 400GbE

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2457801

Description: On Spectrum systems, 10GbE/1GbE Transceiver (FTLX8574D3BCV) stopped working after firmware upgrade.

Keywords: Firmware Upgrade, Transceiver

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2432630

Description: When the hardware-management driver tries to get the ASIC temperature from the firmware during a firmware upgrade, a random value appears outside of the temperature threshold, causing system thermal shutdown.

Keywords: ISSU, Driver, Firmware Upgrade

Discovered in Version: SONiC 201911_MUR6

Fixed in Version: SONiC 202012

2116499

Description: Everflow functionality does not work after warm reboot.

Keywords: Everflow, warm reboot

Discovered in Version: SONiC 201911

Fixed in Version: SONiC 202012

Known Issues

For community-discovered limitations, please refer to the Azure GitHub site.

RM #

Issue

2446581

Description: An error is logged when a MAC address that already exists on the FDB is learned from a different port.

Workaround: N/A

Keywords: MAC learning, FDB

Discovered in Version: SONiC 202012

2393635

Description: Warm reboot fails in case of corrupted /host/warm-reboot/issu-bank.txt file and the switch is in an inconsistent state afterwards.

Workaround: Follow the instructions printed in /var/log/syslog, or run the CLI command warm-reboot -v and then perform a cold reboot.

Keywords: ISSU

Discovered in Version: SONiC 202012

2571738

Description: When configuring seed=0, hash distribution is not optimal.

Workaround: Avoid seed=0 configuration.

Keywords: LAG, HASH

Discovered in Version: SONiC 202012

-

Description: Dynamic port breakout is not supported.

Note: All issues related to this feature are reported on GitHub and are being handled by the community owner.

Workaround: N/A

Keywords: port breakout

Discovered in Version: SONiC 202012

Description: sFLow is not supported on NVIDIA switches.

Workaround: N/A

Keywords: sflow

Discovered in Version: SONiC 202012

2413409

Description: BER may be experienced when using 5m DAC cables between SN4700 and SN2700 in 100GbE speed.

Workaround: N/A

Keywords: Ethernet, Spectrum-3, DAC

Discovered in Version: SONiC 201911_MUR6

2404336

Description: On very rare occasions, when connecting a DR4 PAM4 transceiver to a 100GbE DR1 NRZ, low BER may be experienced.

Workaround: N/A

Keywords: Ethernet, Spectrum-3, DR4

Discovered in Version: SONiC 201911_MUR6

2322812

Description: The interface name in unavailable if the port configuration is removed while using split configuration.

Workaround: N/A

Keywords: SNMP

Discovered in Version: SONiC 201911_MUR6

2350845

Description: The fast-reboot command may fail if the portchannel is part of the VLAN.

Workaround: N/A

Keywords: Fastboot, VLAN

Discovered in Version: SONiC 201911_MUR6

2393983

Description: CLI command show priority-group watermark returns zero value even if the headroom is occupied.

Workaround: N/A

Keywords: Headroom, Watermark

Discovered in Version: SONiC 201911_MUR6

2395745

Description: COLORZ modules (IN-Q2AY2-41 , IN-Q2AY2-27) link up time increased to 85 seconds.

Workaround: N/A

Keywords: Modules, COLORZ

Discovered in Version: SONiC 201911_MUR6

2373739

Description: On SN3800 systems, "Auto negotiation" drop reason is shown as "Other reason -".

Workaround: N/A

Keywords: What Just Happened, Auto negotiation

Discovered in Version: SONiC 201911_MUR6

2373693

Description: On SN3800 systems, the layer 1 state change counter currently does not function properly. We do not recommend using it.

Workaround: N/A

Keywords: What Just Happened, State change counts

Discovered in Version: SONiC 201911_MUR6

2074787

Description: The show mac command fails to show a learned MAC if a VLAN member is added in tagged mode.

Workaround: N/A

Keywords: FDB

Discovered in Version: SONiC 201911_MUR6

2099346

Description: The aclshow utility output does not display counters for control plane ACLs.

Workaround: Run sudo iptables -L -v -n to display the counter fields for the control plane ACLs.

Keywords: aclshow control plane ACLs

Discovered in Version: SONiC 201911_MUR6

2382746

Description: What Just Happened does not report a dropped packet when its dropped reason is Unicast destination IP but multicast destination MAC.

To receive this drop reason, you can use the customer WJH XML configuration file, and set the severity of it from ‘Invalid’ to any other severity.

Workaround: N/A

Keywords: What Just Happened, dropped packets

Discovered in Version: SONiC 201911_MUR6

2376634

Description: Warm reboot on NVIDIA Spectrum-3 is not supported if using SONiC 201911_MUR5 (HASH: c453381aecfda14c276dcc7f8d357a034feb84b4) and below to reboot or upgrade to 201911_MUR6.

Workaround: N/A

Keywords: Warmboot, NVIDIA Spectrum-3

Discovered in Version: SONiC 201911_MUR6

2329793

Description: Modifying a shared buffer during traffic might create undefined behavior and in rare cases leads to packets stuck in the ASIC that require an ASIC reset to recover.

Workaround: Stop traffic before configuring shared headroom.

Keywords: Shared Headroom

Discovered in Version: SONiC 201911_MUR6

2329924

Description: When connecting a SN4700 switch to a Cisco 3432C using 400GbE, the link does not rise in the corner port when using auto-negotiation.

Workaround: N/A

Keywords: SN4700, Link, 400GbE

Discovered in Version: SONiC 201911_MUR6

2360012

Description: Warm reboot fails if PFCWD is enabled on the port when its operational/admin status is down.

Workaround: Do not enable PFCWD on ports when their operational/admin status is down.

Keywords: Warm-reboot, PFCWD

Discovered in Version: SONiC 201911_MUR5

2257265

Description: On an SN4600 switch, the odd ports are not activated while using split-4 mode.

Workaround: N/A

Keywords: Spectrum-3, SN4600, Split, Ports

Discovered in Version: SONiC 201911_MUR5

2245426

Description: On an SN4600 switch, the link does not rise when using LUX42604CO module at 40GbE after toggle.

Workaround: N/A

Keywords: Spectrum-3, SN4600C, Cables

Discovered in Version: SONiC 201911_MUR5

2245816

Description: Splitting with optical cables may not work on an SN4600 switch.

Workaround: N/A

Keywords: Spectrum-3, SN4600, Cables, Ports

Discovered in Version: SONiC 201911_MUR5

2310453

Description: The BGP running configuration is not reflected in the frr.conf file.

Note: As the BGP configuration is not present in the techsupport file, you must submit it separately.

Workaround: Use the show running bgp or the vtysh -c "show run" commands to see the BGP running configuration.

Keywords: BGP, frr.conf file

Discovered in Version: SONiC 201911_MUR4

2036710

Description: A wrong MTU size is displayed in ICMP (type 3, code 4) when fragmentation is needed only for the VLAN interface.

Workaround: N/A

Keywords: MTU, VLAN, ICMP

Discovered in Version: SONiC 201911_MUR4

-

Description: 10G BaseT modules are not supported on the SN3800 switch.

Workaround: N/A

Keywords: SN3800, 10G BaseT modules

Discovered in Version: SONiC 201911_MUR3

2053350

Description: In SN3800 system, when the link goes down on the partner side, the link down counter increases by 2.

Workaround: N/A

Keywords: SN3800, Link

Discovered in Version: SONiC 201911_MUR3

2180871/2148429

Description: Symbol counter may show the wrong indication.

Workaround: N/A

Keywords: SN3800, Counters

Discovered in Version: SONiC 201911_MUR3

2231118

Description: On rare occasions, when connecting a DR4 to NVIDIA Spectrum-3 systems on both sides, toggling on both sides may cause the link to not rise.

Workaround: N/A

Keywords: Port Toggle

Discovered in Version: SONiC 201911_MUR3

2162540

Description: MPLS is not supported for ISSU. Therefore, an MPLS configuration does not hold 0 hit traffic during ISSU.

Workaround: N/A

Keywords: ISSU

Discovered in Version: SONiC 201911_MUR3

1835086

Description: During the re-configuration phase of the ISSU, a port's admin state cannot be changed to DOWN until sx_api_issu_end_set() is called.

Workaround: N/A

Keywords: ISSU

Discovered in Version: SONiC 201911_MUR3

2190769

Description: Incoming ARP and NDP requests trigger the RIF RX_ERR counter.

Workaround: N/A

Keywords: ARP

Discovered in Version: SONiC 201911_MUR3

2200131

Description: When resetting the SFP, the following error message is printed out to the error log.

" Receive PMPE error event on module 0: status 3 error type 0".

This can be safely ignored as it does not impact functionality; SFP reset still works as usual.

Workaround: N/A

Keywords: SFP

Discovered in Version: SONiC 201911_MUR2

Description: SAI does not support disabling auto-negotiation in SONiC.

Workaround: N/A

Keywords: Auto-Negotiation

Discovered in Version: SONiC 201911_MUR1

2102645

Description: Adding a tagged VLAN on a port while an FDB learning process is running on the same port may result in a failure to read the FDB entry when running the show mac command.

Workaround: N/A

Keywords: FDB

Discovered in Version: SONiC 201911_MUR1

2078420

Description: The show mac command fails if it is run while the MACs are being flushed from the FDB.

Workaround: N/A

Keywords: FDB

Discovered in Version: SONiC 201911_MUR1

2074787

Description: The show mac command fails to show any learned MAC if a VLAN member is added when in tagged mode.

Workaround: N/A

Keywords: FDB

Discovered in Version: SONiC 201911_MUR1

Description: Port split to 8 is not supported on NVIDIA Spectrum-2 and NVIDIA Spectrum-3 switches.

Workaround: N/A

Keywords: port-split

Discovered in Version: SONiC 201911_MUR1

Description: Fast reboot is not supported on NVIDIA Spectrum-2 switches.

Workaround: N/A

Keywords: fast-reboot

Discovered in Version: SONiC 201911_MUR1

Description: The MTU of a network device created by the SDK and the MTU of the switch port are not synchronized.

Workaround: Configure the network device MTU to be 4 bytes smaller than the port MTU.

Keywords: MTU

Discovered in Version: SONiC 201911_MUR1

2239785

Description: ethtool does not support parsed QSFP-DD cable EEPROM content.

Workaround: Run show interface transceiver eeprom <interface-name> to see the right content.

Keywords: ethtool

Discovered in Version: SONiC 201911

2239867

Description: 400GbE cables (CMIS) and transceiver EEPROMs are missing page support.

Workaround: N/A

Keywords: Cables

Discovered in Version: SONiC 201911

2116493

Description: The pfcwd show stats command returns wrong (zeroid) counters when a lossless priority is moved to an operational state after being in stormed state.

Workaround: N/A

Keywords: PFCWD

Discovered in Version: SONiC 201911

Description: Port ether stats/in/out packets 4K-9K counters count only packets 4K-8K.

Workaround: N/A

Keywords: Port counters

Discovered in Version: SONiC 201911

Description: ACL table can only be a member of a single sequential ACL group.

Workaround: Create a table per sequential group.

Keywords: ACL

Discovered in Version: SONiC 201911

Description: When using SAI_ACL_IP_TYPE_ANY, it is necessary to set at least one other field, as internally no key is used to match ANY value, and at least one key should be set for every rule.

Workaround: Use the additional field in the rule.

Keywords: ACL

Discovered in Version: SONiC 201911

Description: ACL SAI_ACL_ENTRY_ATTR_ACTION_MIRROR_INGRESS is not supported at egress stage.

Note: An exception exists for SAI_ACL_BIND_POINT_TYPE_ROUTER_INTERFACE at egress stage, when only SAI_ACL_ENTRY_ATTR_ACTION_MIRROR_INGRESS can be used.

Workaround: N/A

Keywords: ACL, Mirroring/SPAN

Discovered in Version: SONiC 201911

Description: In the current DSCP mode, the DSCP value and the ECN mode are shared between the same type of tunnels.

By changing the DSCP mode, the DSCP value and the ECN mode will affect all the tunnels of the same type. Tunnels are considered ‘the same type’ if both the following conditions are met:

  • SAI_TUNNEL_ATTR_TYPE has the same value
  • Tunnel direction has the same value. Direction has 3 types: encap, decap and symmetry.
    • Encap: No decap attributes (which start with SAI_TUNNEL_ATTR_ENCAP_) are configured during tunnel creation.
    • Decap: No encap attributes (which start with SAI_TUNNEL_ATTR_DECAP_) are configured during tunnel creation.
    • Symmetry: Both encap and decap attributes are configured during tunnel creation.

Workaround: Use the same values for all tunnels of same type.

Keywords: Tunnels

Discovered in Version: SONiC 201911

Description: In case the WRED profile has WRED and ECN mark enabled for at least one color, the enabled colors for WRED and ECN must be the same. For example, you cannot have SAI_WRED_ATTR_GREEN_ENABLE=true and SAI_WRED_ATTR_ECN_MARK_MODE=SAI_ECN_MARK_MODE_YELLOW.

Workaround: Use the same enabled colors for WRED and ECN.

Keywords: WRED, ECN, QoS

Discovered in Version: SONiC 201911

Description: Clear queue stats for specific counters always clears all available counters.

Workaround: N/A

Keywords: Queues, Buffers

Discovered in Version: SONiC 201911

Description: Mirror session cannot be edited if the maximum supported mirror sessions was already configured.

The maximum supported mirror sessions for NVIDIA Spectrum ASICs is 3.

The maximum supported mirror sessions for NVIDIA Spectrum-2 and Spectrum-3 ASICs is 8.

Workaround: Remove the session and recreate it with the required new values.

Keywords: Mirroring (or SPAN)

Discovered in Version: SONiC 201911

Description: Switch Prio (SAI TC) <-> IEEE PFC is a global property. Thus, when setting different PFC->PG on different ports, the last value set overrides the rest.

Workaround: Set the same map on all the ports

Keywords: QoS maps

Discovered in Version: SONiC 201911

Description: Debug counters do not work correctly with WJH, and vice-versa, as the configurationss for the two features conflict.

Workaround:

  • Delete all debug counters before using WJH
  • Stop WJH before creating debug counters

Keywords: Debug counters, WJH

Discovered in Version: SONiC 201911

Description: A specific drop reason can only exist in a single debug counter.

Workaround: N/A

Keywords: Debug counters

Discovered in Version: SONiC 201911

2137421

Description: On an SN3800 switch, when working in split mode, you cannot configure the first port to 50GbE while configuring the second port to either 25GbE or 10GbE.

Workaround: N/A

Keywords: SN3800

Discovered in Version: SONiC 201911

1973766

Description: Splitting a port into 4 breakouts is not supported on SN3800 switches.

Workaround: N/A

Keywords: SN3800, split port

Discovered in Version: SONiC 201911

Description: On very rare occasions on SN3800 switches, traffic may get dropped due to high BER in the link.

Workaround: N/A

Keywords: SN3800, Cables, Speeds, BER

Discovered in Version: SONiC 201911

Description: 1GbE is currently not implemented on SN3800 switches.

Workaround: N/A

Keywords: SN3800

Discovered in Version: SONiC 201911

2061691

Description: You cannot use VLAN1 as it is reserved for SONiC internal purposes only. The usable VLAN ID for users starts at VLAN2.

Workaround: N/A

Keywords: VLAN

Discovered in Version: SONiC 201911

1940359

Description: On MSN2010 switches, if a system reboot is triggered using the sudo reboot command, the following wrong reboot cause is displayed: Hardware - Other (Reset caused by hotswap or halt) instead of "reset_sw_reset”.

Workaround: N/A

Keywords: System reboot, MSN2010

Discovered in Version: SONiC 201911

2054684

Description: The IPv6 layer 3 ACL table is not supported on NVIDIA Spectrum-based switches.

Workaround: N/A

Keywords: IPv6 L3 ACL table

Discovered in Version: SONiC 201911

Description: When ISSU is enabled for a SKU, hardware resources are reduced to half (routes, neighbors, ACLs).

To check if ISSU is enabled for a specific SKU, run:

admin@sonic:~$ show platform mlnx issu
  ISSU is enabled
  admin@arc-switch1004:~$

Workaround: N/A

Keywords: ISSU

Discovered in Version: SONiC 201811

Description: The command show interface counters shows RX_BPS, RX_UTIL, TX_BPS, TX_UTIL as N/A until you run sonic-clear counters. The reason is a limitation in counter implementation by a vendor.

Workaround: Run sonic-clear counters after every switch reboot/init. The pps/bps rates and port utilization should be available then.

Keywords: Counters

Discovered in Version: SONiC 201811

Description: ARP refreshing only functions on a VLAN interface.

Workaround: N/A

Keywords: ARP

Discovered in Version: SONiC 201811

Description: Warm reboot and fast reboot are not supported on SN2010 switches.

Workaround: N/A

Keywords: Warm reboot, fast reboot

Discovered in Version: SONiC 201811

1945337

Description: PFCWD does not detect PFC storm for lossy priority on a port that has ASYM-PFC is enabled.

Workaround: N/A

Keywords: PFCWD

Discovered in Version: SONiC 201811

Description: Bit Error Rate monitoring (BER) is not supported on 10GbaseT modules.

Workaround: N/A

Keywords: BER, 10GbaseT modules

Discovered in Version: SONiC 201811

Description: Rx LOS is not supported when both sides of the link are of type BaseT.

Workaround: N/A

Keywords: Rx LOS, BaseT modules

Discovered in Version: SONiC 201811

Description: When configuring shared buffers, the software does not verify that Xon < Xoff < buffer size.

Workaround: Make sure to meet these requirements during configuration.

Keywords: Shared Buffers

Discovered in Version: SONiC 201811

Description: The minimum reserved buffer space for egress traffic is 1.

Workaround: N/A

Keywords: Shared Buffers

Discovered in Version: SONiC 201811

Description: Mapping of switch priority 7 to a non-default Priority Group (PG) is not permitted and causes unexpected behavior.

Workaround: N/A

Keywords: Switch Priority, Priority Group (PG)

Discovered in Version: SONiC 201811

Description: Toggling port speed from 1GbE to other speeds may block 1GbE traffic.

Workaround: N/A

Keywords: Port toggling

Discovered in Version: SONiC 201811

Description: In some configuration cases, Priority Flow Control does not perform as expected.

Only one of the following maps can have none as the default value:

  • TC_TO_QUEUE_MAP
  • MAP_PFC_PRIORITY_TO_QUEUE
  • TC_TO_PRIORITY_GROUP_MAP

Workaround: A single instance of TC_TO_PRIORITY_GROUP_MAP should be applied on all interfaces.

Keywords: QoS mapping

Discovered in Version: SONiC 201811

849302

Description: Traffic is not divided up correctly under congestion if working with Strict priority.

Workaround: N/A

Keywords: Congestion, port priority

Discovered in Version: SONiC 201811