This article explains the warning message issued when the device version and the DMI (Device Management Interface) schema version do not match on a Junos device. It also provides a way to help resolve the situation.

There is a mismatch between the device version and the DMI schema version installed on a Junos device.

If the device version and the DMI schema version installed on a Junos device do not match, one of the following warnings is issued:

• [Mismatch with device OS version] (in older versions of Junos Space)

• [Schema Update needed] (in newer versions of Junos Space)

Note: Although the wording is different, these warnings point out the same issue.

To resolve this situation (a warning, not an error), you should install matching device and DMI schema versions.

If you are unable to match the versions because you cannot locate the required DMI schema in the repository server, you can install the DMI schema version that is closest to the device version. For example, DMI schema 11.4R7.5 can be used with device version 11.4R6.6, even though they do not match.

Upgrade to Space 19.4 or above when using S releases, Space will now automatically use the closest match Schema and Not show a warning.

Example:

Notes:

• You can install only one "closest" schema version per product type. For example, if the default SRX schema is set to use 11.4R7, any SRX code version that does not have matching schema will use the 11.4R7 schema. This schema is usually acceptable for other 11.4 devices because the major code version is the same, but it will probably cause problems for different major versions such as 12.1.
• Junos Space DMI Schemas are released only for major releases and maintenance releases. In general, a schema is not published for service releases. Also, to accommodate the validation process, there is normally a delay of two weeks before a schema is made available for Junos Space.

To set the default schema:

1. Log into the Junos Space WebGUI.
2. Go to Platform > Administration > DMI Schemas.
3. Select the required schema version, right-click, then select Set Default Schema .

For more information on how to update the DMI schema, see the following KB articles:

• How to perform offline DMI schema update on Junos Space
• How to Update the DMI schema on Junos Space

2020-06-18: Added the part about 19.4 supporting S releases with an example.