Device restarted twice today without any reason:

As per customer there were no changes done with the device.

We need to know the root cause of the reboot as soon as possible, especially we need to know if this is hardware or software related.

Routing Engine status:

 Slot 0:

  Current state         Master

<snip>

  Uptime             8 minutes, 29 seconds

  Load averages:         1 minute  5 minute 15 minute

                    2.02    3.55    2.37

  Last reboot reason       catastrophic error/hw misc

There were no errors in hwdre logs.

show trace application hwdre | save /var/tmp/hwdre.log

Upon checking "/var/log/mcelog.log", we could see "Uncorrected DIMM memory error count exceeded threshold" & caused the reboot.

Thu Nov 6 09:42:38 GMT 2025 JTAC mcelog: {"DIMM": { "Status": "2 in 24h", "Description": "Uncorrected DIMM memory error count exceeded threshold: 2 in 24h", "Total": 2, "Location": "SOCKET:0 CHANNEL:1 DIMM:? []", "Channel": 1, "Socket": 0, "Corrected_Errors": 0, "Uncorrected_Errors": 2, "Time": 1762422016, "Threshold": "0" } }

A catastrophic error refers to a critical condition within the CPU where it encounters an internal fault that prevents it from continuing normal operation. As a result, the system initiates a reset to recover.

This error may stem from either hardware or software issues, typically involving the CPU or DIMM components of the Routing Engine.

Recommended Action:

• If the system successfully recovers and resumes normal operation, continue to monitor it closely.
• If the same error recurs, it may indicate a persistent fault. In such cases, consider initiating an RMA process for the Routing Engine or the Chassis (when RE is built-in).