Support Support Downloads Knowledge Base Juniper Support Portal Community

Knowledge Base

Search our Knowledge Base sites to find answers to your questions.

Ask All Knowledge Base Sites All Knowledge Base Sites JunosE Defect (KA)Knowledge BaseSecurity AdvisoriesTechnical BulletinsTechnotes Sign in to display secure content and recently viewed articles

Syslog message: Errors sync xtxn error



Article ID: KB32142 KB Last Updated: 12 Oct 2021Version: 3.0

The "Errors sync xtxn error" message is likely to be caused due to Hardware related error condition since synchronous transaction to external device is not possible

This is a Troubleshooting Article for a PFE ASIC Syslog Event.
To view other documented syslog events related to XMCHIP, XLCHIP, MQCHIP, LUCHIP, EACHIP, and PECHIP, see KB31893 - Index of Articles for Troubleshooting PFE ASIC Syslog Events.



When a "Errors sync xtxn error" event occurs messages similar of the following are reported and are never on its own:


Jun 2 17:43:23 router-re0 fpc1 EA[1:0]_PPE 48 Errors sync xtxn error


Nov 6 20:56:00 router-re0 fpc16 XL[0:0]_PPE 0 Errors sync xtxn error


Aug 6 20:56:00 router-re0 fpc16 LUCHIP(0) PPE 0 Errors sync xtxn error​


  • Typically seen in combination with other error events

  • The affected packet will be dropped

  • Operational impact depends on frequency of such events


This is likely to be caused by hardware related error once synchronous transaction to external device is not possible. This will invoke the trap handler and affected packet getting dropped along with a ttrace is getting reported. Other events need to be examined to understand the root cause trigger.


Perform these steps to determine the cause and resolve the problem (if any).  Continue through each step until the problem is resolved.

  1. Collect the show command output.

    Capture the output to a file (in case you have to open a technical support case). To do this, configure each SSH client/terminal emulator to log your session.

    show log messages
    show log chassisd
    start shell network pfe <fpc#>
    show nvram
    show syslog messages

  2. Analyze the show command output.

    In the 'show log messages', review the events that occurred at or just before the appearance of the "Errors sync xtxn error" message. Frequently these events help identify the cause.


This article is indexed in KB31893 - Primary Index of Articles for Troubleshooting PFE ASIC Syslog Events; tag EACHIPTSG XLCHIPTSG LUCHIPTSG

Tip: When looking at an event in the logs, it is important to focus on the first error message in a collection of syslog messages. The first error message is usually the cause of all the follow-on error messages. The follow-on collateral damage error messages can be ignored.


Modification History:

2017-10-11:  No technical changes. Updated article to link to AI-Script.

Comment on this article > Affected Products Browse the Knowledge Base for more articles related to these product categories. Select a category to begin.

Getting Up and Running with Junos

Getting Up and Running with Junos Security Alerts and Vulnerabilities Product Alerts and Software Release Notices Problem Report (PR) Search Tool EOL Notices and Bulletins JTAC User Guide Customer Care User Guide Pathfinder SRX High Availability Configurator SRX VPN Configurator Training Courses and Videos End User Licence Agreement Global Search