Identifying the ISSU method

  1. Execute the display version comp-matrix file command for the upgrade image version.

  2. Check the Version compatibility list field.

    • If the running software version is in the list, a compatible upgrade is required.

    • If the running software version is not in the list, an incompatible upgrade is required.

  3. Identify the ISSU method:

    • If a compatible upgrade is required, check the Upgrade Way field to identify the ISSU method. For more information about ISSU methods, see Table 12.

    • If an incompatible upgrade is required, check the end of command output for the Incompatible upgrade string.