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Log Reference

AR120, AR150, AR160, AR200, AR1200, AR2200, AR3200, and AR3600 V200R007

This document supports all the logs of device, including the parameters, meaning, possible causes and solution.

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L2V/4/ISSU_CHK_FL:ISSU Check failed. (Reason=[STRING])


The ISSU check on the L2VPN module failed because of problems in compatibility, specifications, and configurations.


Parameter Name Parameter Meaning

Indicates possible causes:

  • starting the ISSU check failed: indicates that the ISSU check cannot be performed.
  • compatibility failed: indicates that the compatibility check failed.
  • getting spec data failed: indicates that specification data cannot be obtained.
  • data did not contain specs: indicates that there were no specifications in the data.
  • specs were inconsistent: indicates that specifications in earlier and later versions were inconsistent.
  • config was greater than the new spec: indicates that the configured value was greater than the value specified in the new specification.
  • new spec did not exist: indicates that the new specification did not exist.

Possible Causes

After the ISSU check was performed to check the version, specifications, and configurations of the L2VPN module, lossless ISSU cannot be performed on the L2VPN module.


  • Perform lossy ISSU on the L2VPN module.
Updated: 2019-05-29

Document ID: EDOC1000097209

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