Alert Type

SRN - Software Release Notification
Low/NotificationSoftware Release Notification
Low/NotificationSoftware Release Notification

Product Affected

QFX5240 series platforms: - QFX5240-64OD - QFX5240-64QD - QFX5241-64OD - QFX5241-64QD - QFX5241-32OD

Alert Description

Junos Software Service Release version 23.4X100-D43-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

NOTE: Starting on August 30th, 2024, we include PR's severity with each entry. See KB86335 [juniper.net] for the definition of PR's Severity

 

Junos Selective Update (JSU) feasible

Not applicable

Call to Action

Upgrade Recommended for QFX5241 Platforms
To ensure optimal performance and stability, Junos Evolved software version 23.4X100-D43 is the recommended release for all QFX5240 platforms.
 
Starting December 12, 2025, we encourage teams to plan and upgrade their QFX5240 series switches to this version.

Solution

Junos Software service Release version 23.4X100-D43-EVO is now available.

23.4X100-D43-EVO - List of Fixed issues

PR NumberSynopsisCategory: EVO L3 routing for BCM XGS Platforms
1900568
Major		Vxlan packet sent to host does not protect overlay BFD packets trigger BFD session flap
Product-Group=evo
Severity=Major		The host-path vxlan overlay packets are throttled at 2kpps but do not protect control traffic like BFD packets which triggers BFD session flapping and induces other protocol flaps like BGP etc.
PR NumberSynopsisCategory: QFX5K EVO Platform Optic
1904999
Major		QFX5241-32OD: Mismatch with optic description for "OSFP-2x400G-LR4-10 740-174937" and "OSFP-2x400G-FR4 740-174935"
Product-Group=evo
Severity=Major		"show chassis hardware" command shows optical modules - "OSFP-2x400G-LR4-10-P" -- SKU 740-174937, and "OSFP-2x400G-FR4-P" -- SKU 740-174935, without the "-P" suffix.
PR NumberSynopsisCategory: Category for QFX5K EVO Platform Software PRs related to Chas
1917892
Minor		sysObjectID.0 Returns 0 on QFX5240-64OD/QD during SNMP MIB walk
Product-Group=evo
Severity=Minor		On QFX5240-64OD/QD platform, when running SNMP MIB(Simple Network Management Protocol Management Information Base) walk on system "sysObjectID.0" shows value of 0.

 

 

23.4X100-D43-EVO - List of Known issues

PR NumberSynopsisCategory: Layer2 forwarding on EX/NTF/PTX/QFX
1816344
Major		EVPN : Traffic failure after multiple link flaps of core facing interfaces on scaled setup
Product-Group=evo		ARP resolution failure when there is quick flap of core facing interface on scaled setup

Resolved In: evo:24.2R2-S2-EVO evo:24.4R2-EVO evo:25.2R1-EVO evo:25.3R1-EVO junos:24.2R2-S2 junos:24.4R2 junos:25.2R1 junos:25.3R1

 

Modification History

First publication 2025-12-12