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21.2R1-S1-EVO: Software Release Notification for JUNOS Software Version 21.2R1-S1-EVO



Article ID: TSB18162 TECHNICAL_BULLETINS Last Updated: 08 Sep 2021Version: 2.0
Alert Type:
SRN - Software Release Notification
Product Affected:
ACX, PTX, and QFX Series running Junos Evolved Software -- ACX7100-48L, PTX10001-36MR, PTX10003, PTX10004, PTX10008, QFX5130-32CD, and QFX5220 Devices
Alert Description:
Junos Software Service Release version 21.2R1-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
Risk Risk Description
Low/Notification - No defined time impact to take action Software Release Notification
Impact Impact Description
Medium - Risk of service interruption Software Release Notification


Junos Software service Release version 21.2R1-S1-EVO is now available.

21.2R1-S1-EVO - List of Fixed issues

PR Number Synopsis Category: PTX10003 Platform related issues
1598337 PTX10003:show platform object-info anomalies summary cli command times out
"show platform object-info anomalies summary" CLI command may time out after the system is up for some time. This does not affect normal operation of the system but this debug command will not work.
PR Number Synopsis Category: Class of Service
1604943 IEEE 802.1 rewrite rule might not work on MPC10 linecard
On MX platforms with MPC10 linecard, if Class-of-Service (CoS) ieee-802.1 rewrite rule is applied on Aggregated Ethernet (AE) interface with vlan-ccc encapsulation, the rewrite rule might not work as expected due to this issue.
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: Firewall related development
1605805 The firewalld may crash if configuring fragment-offset out of the range (fragment-offset 1-900000000000)
On all Junos EVO platforms, if configuring the fragment-offset value in the firewall match condition out of the supported range 0-8191, the firewalld crash might be seen. When it happens, traffic loss might be observed.
PR Number Synopsis Category: EVO L2 Control Plane PRs
1598217 arpd and ndp daemon crash in scale setups
In scaled scenarios (4k BDs, IRBs), with restart of l2ald and pfe daemons, arpd and ndp daemon crash is observed and it recover by itself and no functionality impact expected
PR Number Synopsis Category: Label Distribution Protocol
1594405 rpd core in backup RE@ in mirror_process_recvd_data_queue with mldp NSR config
RPD may restart unexpectedly when you delete the static LDP p2mp configuration.
PR Number Synopsis Category: MPC11 ULC fabric software related issues.
1573972 MPC11E "AM : IPC handling" warnings can be seen in the logs
The following messages might be seen in the logs from MPC11E line-card: Feb 9 11:35:27.357 router-re0-fpc8 aftd-trio[18040]: [Warn] AM : IPC handling - No handler found for type:27 subtype:9 There is no functional impact, these logs can be ignored.
PR Number Synopsis Category: PTX10K Diagnostics related PRs
1597763 False alarm: "Major Host # Ethernet Interface Link Down" seen on a PTX10016
False alarm: "Major Host # Ethernet Interface Link Down" may be seen on a PTX10016 running Junos EVO software.
PR Number Synopsis Category: PTX10K specific platform PRs
1608088 Junos EVO : PT10008 : Resiliency improvement - improving individual fan alarm detection and reporting algorithm
On a PTX10008/16 running Junos Evolved software, the system may report and raise RED alarm for an individual fan failure erroneously. This change improves fan failure detection and reporting.
1614952 Line-cards might be unstable due to the sustainable growing memory usage of evo-cda-bt app
In PTX platforms running Junos Evolved scenario, if the allocated memory of High-bandwidth Memory (HBM) is not be freed properly by evo-cda-bt app after used, the evo-cda-bt might request a new memory block during invoking a periodic or some tasks. As time goes by, the unreleased memory of evo-cda-bt might be accumulated more and more (e.g. 8Mb/per day), the available memory for FPC running will be too low to lead to the memory leak. Finally, the FPC might be unstable.
PR Number Synopsis Category: Express ZX PFE L3 Features
1602353 GRE keepalive packet with recursion control bit set get dropped on PTX10003
On PTX10003, the GRE keepalive packet with recursion control bit set gets dropped due to the GRE header check is enabled.

21.2R1-S1-EVO - List of Known issues

PR Number Synopsis Category: Application controller related issues
1602446 An FPC may restarts continuously with a policer configuration
On the Junos Evolved products with an interface policer configuration. When restarting an FPC that has no firewall policer configuration, or installing a new FPC, this may cause the FPC with the interface policer to crash and restart continuously.
Modification History:
First publication 2021-09-08
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