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EX2300 platforms might stop forwarding traffic or responding to console



Article ID: TSB17670 TECHNICAL_BULLETINS Last Updated: 03 Dec 2019Version: 1.0
Alert Type:
PSN - Product Support Notification
Alert Description:
On EX2300/EX2300-C platforms, if Junos software is with FreeBSD kernel version 11 with the build date on or after 2019-02-12, the switch may stop forwarding traffic or responding to console. 
When the issue occurs, some of below symptoms could be observed: 
1. Not responding to console 
2. Not able to ping management interface
3. Traffic is not going through
4. No core dump after the power cycle             
5. No related error messages 
6. LED is flashing after disconnecting the cable as well

This issue was seen due to a defect in the Freebsd kernel 11. There is no specific trigger to this issue and while infrequent, can be randomly seen during normal operations. There is no workaround of this issue. Power cycle of switch would recover the issue.

Below PR is tracking this issue.

PR1442376 : EX2300 platforms with some specific releases might stop forwarding traffic or responding to console

On EX2300/EX2300-C all Junos Release with Freebsd Kernel 11 Build date from 2019-02-12 to 2019-10-21 are affected by this issue.

Below command can be used to check the Build date and Version of the Freebsd kernel of a Junos Release to see if it is affected or not.

root@d10-7> show version
Hostname: d10-7
Model: ex2300-24p
Junos: 18.1R3-S6.1
JUNOS OS Kernel 32-bit  [20190316.df99236_builder_stable_11] <---- Freebsd Kernel with Version 11 and Build date is 2019-03-16 . Hence 18.1R3-S6 is affected by this PR. 
JUNOS OS libs [20190316.df99236_builder_stable_11]
JUNOS OS runtime [20190316.df99236_builder_stable_11]
JUNOS OS time zone information [20190316.df99236_builder_stable_11]
JUNOS py extensions [20190607.095012_builder_junos_181_r3_s6]
JUNOS py base [20190607.095012_builder_junos_181_r3_s6]

This issue has been fixed in 18.2R3-S2 and fix will be available on all upcoming Junos software releases.

Issue has been fixed from FreeBSD kernel version 11 build date of 2019-10-22. Junos releases built after this date would contain the fix.

Following Junos Release would contain the fix.


Please refer PR 1442376 for further details on software releases with fix. 


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