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17.1R3-S1: Software Release Notification for Junos Software Service Release version 17.1R3-S1



Article ID: TSB17643 TECHNICAL_BULLETINS Last Updated: 25 Sep 2019Version: 1.0
Alert Type:
SRN - Software Release Notification
Product Affected:
ACX, EX, MX, PTX, QFX, Junos Fusion
Alert Description:
Junos Software Service Release version 17.1R3-S1 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

Junos Software service Release version 17.1R3-S1 is now available.

The following are incremental changes in 17.1R3-S1.

PR Number Synopsis Description

MPC stops forwarding traffic upon using service queue-monitoring application or once using ddos flow-detection

If the application ddos flow-detection(SFCD) or QMON (set services analytics resource-profiles bla queue-monitoring) are configured, local packet forwarding context memory could get overwritten and corrupting the dispatch cookie causing permanent forwarding issue.


Host destined packets with filter log action might not reach to the routing engine if log/syslog is enabled.

On EX4300/EX4600/QFX Series switches except for QFX10k, if host destined packets (i.e., the destination address belongs to the device) come from the interface with ingress filter of log/syslog action (e.g., 'filter <> term <> then log/syslog'), such packets should not be dropped and reach the routing engine.


The alarm might be seen if the PEM's serial number starts with "1F1"

On ACX/EX/QFX/SRX platforms, if the PEM's serial number starts with "1F1", the alarm "Minor FPC PEM Temp Sensor Failed" might be seen.


QFX5100-48T 10G interface might be auto-negotiated at 1G speed instead of 10G

QFX5100-48T 10G interface might be auto-negotiated at 1G speed instead of 10G after peer device reboot. This issue will cause link down and impact customer service.


The interface can not get up when the remote-connected interface only supports 100M in QFX5100 VC setup

If QFX5100-48T is not the primary in VC/VCF scenario, the interface can not get up when the remote-connected interface with auto-negotiation configured only supports 100M.


PFE memory leak might be seen if MLPPP links are flapped

On all Trio-based platforms, MLPPP links flap continuously might result in PFE memory exhaustion. Furthermore, the PFE crash might be seen due to running out of memory.


Interfaces configured with flexible-vlan-tagging might loss connectivity

On QFX5000 series platform and related products (like ACX5K and EX4600), a port configured in service provider style (flexible-vlan-tagging) might lose connectivity over the native VLAN when additional tagged VLANs are added to it. The impact is that all the hosts' traffic over the designated native VLAN might be dropped.


The cfmd process might crash after a restart on Junos 17.1R1 and above

On MX platforms running Junos 17.1R1 and above, when enhanced-ip mode and CFM centralized mode ("no-aggregate-delegate-processing" konb is configured for CFM) are used , after a cfmd restart (e.g. device cold start/restart, RE switchover), the cfmd process might crash and could not run anymore.

Modification History:
First publication 2019-09-25
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