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19.1R1-S5: Software Release Notification for JUNOS Software Version 19.1R1-S5



Article ID: TSB17790 TECHNICAL_BULLETINS Last Updated: 21 May 2020Version: 2.0
Alert Type:
SRN - Software Release Notification
Product Affected:
Alert Description:
Junos Software Service Release version 19.1R1-S5 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 19.1R1-S5 is now available.

19.1R1-S5 - List of Fixed issues

PR Number Synopsis Category: EX2300/3400 platform
1477165 EX3400 me0 interface might remain down
The me0 interface of EX3400 does not come up when connected to 100m speed interface.
PR Number Synopsis Category: Pinnacle Hardware
1457516 QFX5110s switches port 51 has 1 led blinking amber
One of the LEDs on port 51 on QFX5110s is blinking amber continuously. This caused by the PTP inadvertently access port 51 instead of limiting its access to only port 52 and 53. The fix is to correct the PTP process to only use port 52 and 53
PR Number Synopsis Category: Border Gateway Protocol
1487691 High CPU utilization might be observed when the outgoing BGP updates are sending slowly
On all Junos platforms with the BGP routing protocols, the rpd process might go into a high CPU utilization causing slow network convergence. If a BGP peer is receiving and processing BGP updates slowly, this may cause the BGP output queue of the sending BGP peer to be full. When the queue is full it causes high CPU utilization of the BGP IO thread (bgpio, it is part of the rpd daemon) on the sending BGP peer. This defect could cause network-wide slow BGP network convergence. (See also
PR Number Synopsis Category: Security platform jweb support
1499280 Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services
Junos OS: Security vulnerability in J-Web and web based (HTTP/HTTPS) services (CVE-2020-1631). Refer to for more information.
PR Number Synopsis Category: vMX Platform Infrastructure related issue tracking
1491662 vFPC becomes unresponsive following reboot of vMX
i40evf stack trace "i40evf_free_all_rx_resources" is seen and FPC becomes unresponsive resulting in packet loss.
PR Number Synopsis Category: VMX wrlinux changes
1475381 TCP-MSS is not working for LNS subscriber and IP traffic in MX150
When TCP-MSS is configured on Dynamic-Profile or enabled for plain IP traffic, only the initial SYN packet will be marked correct with configured TCP-MSS rest SYNC packets will not be marked correctly.
PR Number Synopsis Category: Interface related issues. Port up/down, stats, CMLC , serdes
1388591 Error message "portmod_port_core_access_get: Invalid parameter" seen in log messages
QFX5110 has both internal and external PHYs. The procedure to read FEC statistics from external Phys is different from the one used to read from internal phys. On using the APIs meant for internal PHYs on external PHYs, error messages are displayed.
PR Number Synopsis Category: QFX platform optics related issues
1430115 Interface on QFX does not come up after the transceiver is replaced with one having different speed
On QFX series platforms, interface may not come up when the transceiver is replaced with another transceiver which has different speed.
PR Number Synopsis Category: QFX PFE Class of Services
1476829 QFX Platforms are exhibiting invalid PFE PG counter pairs to copy, src 0xfffff80, dst 0
On QFX Series Switches one may see "invalid PFE PG counter pairs" errors might be displayed as a result of polling class of service-related SNMP OIDs. These messages might eventually lead to interface counters not being populated properly.

19.1R1-S5 - List of Known issues

PR Number Synopsis Category: NFX Series Platform Software
1493062 [jdm] [nfx3] NFX250 :: CLI command "request vmhost power-off" reboots the device instead of power off on NFX250 operating nfx3 image
CLI command "request vmhost power-off" reboots the device instead of power off on NFX250 operating nfx3 image for 19.4R1
PR Number Synopsis Category: Flow Module
1465944 Junos OS: High-End SRX Series: Multicast traffic might cause all FPCs to reset. (CVE-2020-1634)
On High-End SRX Series devices, in specific configurations and when specific networking events or operator actions occur, an SPC receiving genuine multicast traffic may core. Refer to for more information.
PR Number Synopsis Category: Layer 2 Control Module
1505710 AUTO-CORE-PR : JDI RPD REGRESSION : L2CPD core found @ erp_add_restart_perst_stp_inst_info pmem_walk erp_build_restart_perst_stp_inst_info
This core will be seen if you have added/deleted ERP config multiple times and then restarted l2cpd or rebooted the box. When this issue is hit, l2cpd will not recover again and it would be coring continuously.
PR Number Synopsis Category: IPv6/ND/ICMPv6 issues
1439844 DHCPv6 relay binding is not up when integrated routing and bridging(IRB) interface enabling DHCPv6 Snooping and Neighbor Discovery Inspection (NDI) simultaneously on EX9200
In DHCPv6 relay scenario, when DHCPv6 snooping and NDI enable simultaneously on IRB interface on EX9200, DHCPv6 relay binding is not up.
Modification History:
First publication 2020-05-21
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