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20.2R2-S1-EVO: Software Release Notification for JUNOS Software Version 20.2R2-S1-EVO

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Article ID: TSB17982 TECHNICAL_BULLETINS Last Updated: 19 Feb 2021Version: 1.0
Alert Type:
SRN - Software Release Notification
Product Affected:
PTX and QFX series running Junos Evolved
Alert Description:
Junos Software Service Release version 20.2R2-S1-EVO is now available for download from the Junos software download site
Download Junos Software Service Release:
  1. Go to Junos Platforms - Download Software page
  2. Input your product in the "Find a Product" search box
  3. From the Type/OS drop-down menu, select Junos SR
  4. From the Version drop-down menu, select your version
  5. Click the Software tab
  6. Select the Install Package as need and follow the prompts
Solution:

Junos Software service Release version 20.2R2-S1-EVO is now available.

20.2R2-S1-EVO - List of Fixed issues
PR Number Synopsis Category: Firewall related development
1552641 Firewall: Use of filter configured without address-family as nested filter causes config commit to fail
Product-Group=evo
Firewall: Use of filter configured without address-family as nested filter causes config commit to fail
PR Number Synopsis Category: software upgrade infra issues
1557020 The device might not boot up after performing the cleanup operation
Product-Group=evo
If using the CLI command "request system storage cleanup deep-force" to clean up the space or the old image of the device, it might delete all images installed on a router including the next incoming image-related information. Hence, the device might not boot up with the next incoming image.
PR Number Synopsis Category: EVO Netstack Socket Intercept and NetIO libraries
1553897 Launching the CLI produces a syslog notice.
Product-Group=evo
When the CLI is launched, the system generates a syslog message at the notice level stating "cli[]: 32-bit application cli is not compatible with SI". This message does not indicate a functional problem and can be ignored.
PR Number Synopsis Category: Layer 2 Control Module
1561235 The l2cpd core might be seen on reboot
Product-Group=evo
When xSTP is used, the l2cpd core might be seen on reboot. This will be a one-time core and will not impact on functionality.
 

20.2R2-S1-EVO - List of Known issues
PR Number Synopsis Category: Ardbeg Hardware related issues.
1532088 PTX10001-36MR - Continuous CRC errors seen during repetitive reboot tests after 22 iterations of system reboot
Product-Group=evo
When a PTX10001-36MR is repeatedly rebooted then in 1 out of 25 iterations, one of the fabric links may start showing continuous CCL errors.
PR Number Synopsis Category: Express BT PFE L3 Features
1536681 20.2R2 MultiD: Latency for traffic from 100G to 10G port is 4 time more compared to latency for traffic from 400G to 100G port; all within single router
Product-Group=evo
Traffic from a 100G interface to 10G interface in PTX1001-36MR shows 4 times more latency compared to traffic from a 400G interface to 100G interface.
PR Number Synopsis Category: EVO ARP related PRs
1520016 PTX10001 Memory leak seen with 48 hours passive stability
Product-Group=evo
In PTX10001-36MR with multiple protocols and services configured with scale, the user may see available free memory reducing over time even without doing any changes in the configuration.
PR Number Synopsis Category: EVO build infrastructure related issues.
1508626 Add Python 3.x for EVO - module list
Product-Group=evo
There are Python 3.x modules that are missing from the Junos Evolved library. The equivalent of these modules is already installed under Python 2.7 module library.
PR Number Synopsis Category: software upgrade infra issues
1554107 Software upgrade rollback may fail on Junos OS EVO platforms
Product-Group=evo
On all Junos EVO platforms, during software rollback, if certain db and configuration files are not copied to chroot environment then mgd may fail to perform the configuration validation.
PR Number Synopsis Category: Configd, ffp issues
1534858 The firewall filter for both IPv4 and IPv6 may not work when it is applied through apply-groups
Product-Group=evo
On Junos OS Evolved PTX devices, the firewall filter for both IPv4 and IPv6 does not work when it is applied through apply-groups on the subinterface
PR Number Synopsis Category: Express PFE CoS Features
1478811 [cos] [scheduler] PTX10008:scheduler with all queues oversubscribed, maximum latency is different on different queues - 21ms ~ 29ms.
Product-Group=evo
In PTX10001-36MR when all CoS queues are over-subscribed, then maximum latency may vary from 21ms to 29ms for different queues.
1519345 [cos] [scheduler] with all queues oversubscribed, latency time varies from 5ms ~ 27 ms for queue#0~#7 (l3_cos_jitter.robot)
Product-Group=evo
with all queues oversubscribed, latency time varies from 5ms ~ 27 ms for queue#0~#7 (l3_cos_jitter.robot)
1535523 Ardbeg: 20.2R2 MultiD: Interface queue counter shows incorrect large value (18446743936270598160) on applying apply-group on IFD for scheduler
Product-Group=evo
In rare cases, when interface statistics of an individual interface is cleared, then the queue counter for that interface might show large number of incorrect 20-digit counter values.
PR Number Synopsis Category: ISIS routing protocol
1540400 PTX10008 : traffic loss seen after Graceful switchover with LSR Core MPLS_DSCP profile configuration
Product-Group=evo
PTX10008 : traffic loss seen after Graceful switchover with LSR Core MPLS_DSCP profile configuration
PR Number Synopsis Category: PRs for Lazurite Platform and Interface
1538514 After config "global system name-server" config commit should fail but commit is succeeds.
Product-Group=evo
After config "global system name-server" config commit should fail but commit is succeeds.
PR Number Synopsis Category: Multiprotocol Label Switching
1532365 Junos EVO - Deactivating mpls protocols commit is allowed when spring is enabled which is not expected
Product-Group=evo
On a Junos Evolved platform, with the "Source Packet Routing In Networking" (SPRING) feature - the system, erroneously, allows you to deactivate the "protocols mpls" configuration stanza.
PR Number Synopsis Category: Microkernel for neo mpc
1538131 JDI-RCT:M/Mx: NPC crashed @ cmtfpc_mic_neo_state_check (mic_env=< optimized out>, mic_slot=< optimized out>) at ../../../../src/pfe/common/applications/cmt/jam/cmtfpc_pic_npc_jam.c:4808
Product-Group=evo
This issue is due to Thread hogging for 2.5s after ISR registration during ISSU done phase causing a core at FPC. FPC will get rebooted with ISR registration again during normal init. This issue is specific to "3D 20x 1GE(LAN)-E,SFP" and "3D 20x 1GE(LAN)-EH,SFP" MIC types.
PR Number Synopsis Category: vMX Data Plane Issues
1534568 [CORE-PR][vZT]: Inconsistent core.python2.7.mpc0 core is seen with stacktrace @ea_wi_precl,@ea_macsec_receive
Product-Group=evo
Inconsistent core.python2.7.mpc0 core is seen with stacktrace @ea_wi_precl,@ea_macsec_receive()
PR Number Synopsis Category: KRT Queue issues within RPD
1511539 Traffic loss might be seen after GRES
Product-Group=evo
On all platforms with GRES enabled packet loss around 1% was seen after GRES check pass and then GRES.
 
Modification History:
First publication 2021-02-19
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