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21.1R2-S2: Software Release Notification for JUNOS Software Version 21.1R2-S2



Article ID: TSB18215 TECHNICAL_BULLETINS Last Updated: 30 Nov 2021Version: 1.0
Alert Type:
SRN - Software Release Notification
Product Affected:
Alert Description:
Junos Software Service Release version 21.1R2-S2 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 21.1R2-S2 is now available.

21.1R2-S2 - List of Fixed issues

PR Number Synopsis Category: Express pfe Mclag
1610173 Continuous L3 traffic drop might be observed with MC-LAG configuration on QFX10K platforms
On QFX10K platforms with MC-LAG configured, When trying to add or remove the MC-LAG configuration continuous L3 traffic drop might be observed which might not be recovered.
PR Number Synopsis Category: TCP/UDP transport layer
1626400 Configuration commit may fail while configuring the knob 'authentication-key-chains' under groups
On all Junos and Evo platforms, if 'no-persist-groups-inheritance' is not configured, configuration commit issues may be seen while configuring the knob 'authentication-key-chains' under groups. Expanded view of the database is not fetched when configured via groups security and hence commit check error may be seen. The TCP-keychain functionality may not work as expected if this issue occurs.
PR Number Synopsis Category: Junos Automation, Commit/Op/Event and SLAX
1604622 File download using "request system download" might fail
On a EX4400 device, any files scheduled for download using the cli command "request system download" might fail due to error. The files can be downloaded using normal ftp/scp commands on the device.
PR Number Synopsis Category: Configuration management, ffp, load action
1601159 The commitd core file may be observed after committing some configuration change
On all Junos platforms, if juniper.db size is more than 700 MB and commitd is invoked, it causes the device to generate a core file (or dump file).

21.1R2-S2 - List of Known issues

PR Number Synopsis Category: EVPN control plane issues
1600310 [evpn_vxlan] [evpn_instance] : mx960 ::JUNOS:JDI_FT_REGRESSION::VMX:Bridge mac-table learning entries are not as expected for EVPN-VXLAN-1 routing instance
In a scenario with EVPN-VXLAN in the Datacenter and EVPN-MPLS is in the WAN and the stitching is done with an LT interface, then the bridge mac-table learning entries are not as expected for EVPN-VXLAN routing instance. This could occur after 'restart interface-control' is issued on gateways.
Modification History:
First publication 2021-11-30
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