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21.2R1-S2-EVO: Software Release Notification for JUNOS Software Version 21.2R1-S2-EVO



Article ID: TSB18200 TECHNICAL_BULLETINS Last Updated: 08 Nov 2021Version: 1.0
Alert Type:
SRN - Software Release Notification
Product Affected:
PTX and QFX Series running Junos Evolved Software
Alert Description:
Junos Software Service Release version 21.2R1-S2-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
Risk Risk Description
Low/Notification - No defined time impact to take action Software Release Notification
Impact Impact Description
Low/Notification - Monitor the situation but no action needed Software Release Notification


Junos Software service Release version 21.2R1-S2-EVO is now available.

21.2R1-S2-EVO - List of Fixed issues

PR Number Synopsis Category: QFX VC/VCF NSSU
1621611 QFX5200: NSSU (nonstop-upgrade) CLI missed in QFX TVP codes
NSSU option is not available from 21.2R1. This option is missing from the time UI component publish has been separated out.
PR Number Synopsis Category: EVO Netstack FIB Service Daemon
1603783 Malformed packets may be sent out on egress interfaces in Junos-EVO platform
On platform running Junos Evolved, Malformed packets may be sent out on egress interfaces during a period when destination MAC is being resolved.
PR Number Synopsis Category: SNMP, mib2d issues
1621606 incorrect IF-MIB::ifHCInUcastPkts and ifHCInBroadcastPkts statistics
incorrect IF-MIB::ifHCInUcastPkts and ifHCInBroadcastPkts statistics reported
PR Number Synopsis Category: RPD API infrastructure
1607185 TCP traffic might be dropped on source port range 512 to 767 when the FlowSpec IPv6 filter is configured
In the BGP FlowSpec scenario, the IPv6 filter matching icmp-type 2 only drops TCP traffic on source port range 512 to 767.

21.2R1-S2-EVO - List of Known issues

PR Number Synopsis Category: "agentd" software daemon
1600412 gNMI Telemetry might stop working after RE switchover
In a dual RE (Routing Engine) system with GRES (Graceful Routing Engine Switchover) NSR (Nonstop Active Routing) enabled telemetry might stop working after RE switchover.
PR Number Synopsis Category: mgd, ddl, odl infra issues
1580631 Few config yang modules are missing during build time YANG generation
Few native config yang modules may be missed during the built time.
PR Number Synopsis Category: PTX10K platform specific fabric PRs
1611753 PTX10016 :: On a fully loaded scapa16, when all the FPCs are in online state, and when SIB offline/online is performed, fabric link training will take close to 10 mins
PTX10016:: With a fully loaded chassis and all the FPCs are online, if you take a SIB offline/online, its fabric link training will take close to 10 mins
1612624 Some of the fabric links might go into faulty state after swapping FPC LC1201 with LC1202
On PTX10016 platform, swapping FPC (Flexible PIC Concentrator) LC1201 with LC1202 causes a few fabric links to go into FAULT state and traffic drop will be seen.
1615297 PTX10016 :: Ungraceful FRU removal not recommended
On Ungraceful FRU removal will result in CRC errors on the peer FRUs, which can potentially wedge the PFEs.
PR Number Synopsis Category: PTX10K specific platform PRs
1598866 SNMP 18.2X75-D66 Feature Parity: Naming convention discrepancy in field entPhysicalDescr on EVO
entPhysicalDescr entries will no longer have the "slot" annotations.
PR Number Synopsis Category: Authentication, Authorization, Accounting, PAM (RADIUS/tacplus)
1600615 The process mgd may crash with authentication setup
If authentication (e.g., tacplus-server, radius-server) is configured on a device, it may fail to open files in a rare case, which may cause the process mgd to crash.
Modification History:
First publication 2021-11-08
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