ISSU: Operation details

A new option, verbose, is added at the [request system software in-service-upgrade package-name] hierarchy level. This option provides information about all stages in a unified ISSU operation. 

When this option added to the command, the output provides the following additional information: 

• State of various Routing Engine daemons 
• Daemon that caused the failure of an unified ISSU operation in cases where the ISSU is terminated because of daemon readiness check failure
• Progress of a unified ISSU operation, such as the initialization, hardware synchronization, and completion