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# Monitoring a Unified In-Service Software Upgrade

You can use the show issu command to monitor the status of the router with regard to a unified in-service software upgrade.

show issu

- Use to display information about the current status of the router relative to a unified in-service software upgrade and of the upgrade itself.
- Field descriptions
  - ISSU state—State of the upgrade process, idle, initializing, initialized, or upgrading
  - ISSU description—State of the upgrade, including percent complete
  - criteria met—Whether prerequisites for the upgrade have been met and, generally, what errors occurred
  - running release—Filename of JUNOSe Software release that is currently running on the SRP modules
  - armed release—Filename of JUNOSe Software release that is armed to become the next running release when the router reboots
- Example 1—Displays the current unified ISSU state and identifies the active and armed releases

      host1#show issu brief

      ISSU state:       initializing
      ISSU description: ISSU initialize is in-progress, 5% complete
      criteria met:     No, upgrade error(s) found
      running release:  release1.rel
      armed release:    release2.rel

- Example 2—To the information displayed by show issu brief, adds a summary table of unified ISSU verification criteria

      host1# show issu
      ISSU state:       idle
      ISSU description: ISSU is currently idle
      criteria met:     No, upgrade error(s) found
      running release:  release1.rel
      armed release:    release2.rel
      #                  ISSU Activation Criteria Summary                Met
      --   -----------------------------------------------------   -----------
      1    In-Service Software Upgrade ready?                           Yes
      2    High-Availability ready?                                     No
      3    Line modules ready?                                        Conditional
      4    Configuration conversion support ready?                      Yes
      5    CLI sessions ready?                                          Yes
      6    Routing applications ready?                                  Yes
      7    Protocol timers ready?                                       Yes

- Example 3—To the information displayed by show issu, adds a detailed table of unified ISSU verification criteria that lists mandatory and conditional criteria that have not been met, the impact of this status, and the remedy as reported by router applications and system components that participate in the in-service software upgrade

      host1# show issu detail
      ISSU state:       idle
      ISSU description: ISSU is currently idle
      criteria met:     No, upgrade error(s) found
      running release:  release1.rel
      armed release:    release2.rel
      #                  ISSU Activation Criteria Summary               Met
      --   ------------------------------------------------------   -----------
      1    In-Service Software Upgrade ready?                           Yes
      2    High-Availability ready?                                     No
      3    Line modules ready?                                      Conditional
      4    Configuration conversion support ready?                      Yes
      5    CLI sessions ready?                                          Yes
      6    Routing applications ready?                                  Yes
      7    Protocol timers ready?                                       Yes
      #                 ISSU Criterion Detail                           Met
      --   ------------------------------------------------------   -----------
      1    In-Service Software Upgrade ready?                           Yes
      2    High-Availability ready?                                      No
      ->  Problem: The standby SRP must not be running the same release  No

           Reporting Slot: 6
           Impact: ISSU cannot be performed
           Remedy: boot a release compatible with ISSU on the standby SRP
      3    Line modules ready?                                   Conditional
      ->   Problem: Card does not support required memory configuration  Conditional
           : Slot 1, OC3/OC12/DS3-ATM, requires at least 256 MB
           Reporting Slot: 6
           Impact: If you continue, the card will immediately be reset
           and then cold started when ISSU Upgrade completes
           Remedy: data unavailable
      ->   Problem: Card does not support required memory configuration  Conditional
           : Slot 8, CT3-12, requires at least 256 MB
           Reporting Slot: 6
           Impact: If you continue, the card will immediately be reset
           and then cold started when ISSU Upgrade completes
           Remedy: data unavailable
      ->   Problem: Card does not support required memory configuration  Conditional
           : Slot 9, CT3-12, requires at least 256 MB
           Reporting Slot: 6
           Impact: If you continue, the card will immediately be reset
           and then cold started when ISSU Upgrade completes
           Remedy: data unavailable
      ->   Problem: Card does not support required memory configuration  Conditional
           : Slot 10, CT3-12, requires at least 256 MB
           Reporting Slot: 6
           Impact: If you continue, the card will immediately be reset
           and then cold started when ISSU Upgrade completes
           Remedy: data unavailable
      ->   Problem: Card not disabled or not online: Slot 1, OC3/OC12/D  Conditional
           S3-ATM, 0/0
           Reporting Slot: 6
           Impact: If you continue, the card will immediately be reset
           and then cold started when ISSU Upgrade completes
           Remedy: If not standby, Wait for card to come online before
           proceeding
      ->   Problem: Card not disabled or not online: Slot 8, CT3-12, 0/  Conditional
           0
           Reporting Slot: 6
           Impact: If you continue, the card will immediately be reset
           and then cold started when ISSU Upgrade completes
           Remedy: If not standby, Wait for card to come online before
           proceeding
      4    Configuration conversion support ready?                        Yes
      5    CLI sessions ready?                                            Yes
      6    Routing applications ready?                                    Yes
      7    Protocol timers ready?                                         Yes

- See show issu.

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