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[MX104] Chassis-control error when performing a unified ISSU

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Article ID: KB29381 KB Last Updated: 07 Aug 2014Version: 1.0
Summary:

This article addresses the likely cause of a chassis-control error that can occur when performing a unified in-service software upgrade (ISSU) on an MX104 router.

Symptoms:

When performing a unified ISSU on an MX104 router, the upgrade fails with the following error:

error: Unrecognized command (chassis-control)
warning: The FPC state on LCC may not be ONLINE

Cause:

The likely cause of this error is that the unified ISSU is run on a version of the Junos OS below 14.1R1, whereas the unified ISSU is not available on the MX104 until Junos OS 14.1R1.

Solution:

Run a unified ISSU only on Junos OS 14.1R1 and above.

To upgrade an MX104 router to a version of the Junos OS below 14.1R1, use a standard upgrade instead of a unified ISSU.

If you encounter this chassis-control error when performing a unified ISSU on an MX104 router running Junos OS 14.1R1 and above, please Open a Case with JTAC.

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