199Predefined user rolesnetwork-adminParametersminutes: Specifies the automatic rollback interval in minutes, in the range of 0 to 120. Setting it to 0disables the automatic rollback feature.Usage guidelinesThe automatic software version rollback feature is only available on a multichassis IRF fabric duringan ISSU to a compatible version.The system starts the automatic rollback timer when you execute the issu run switchovercommand in a scenario where automatic rollback is supported. If you do not execute the issu acceptor issu commit command before the timer expires, the system automatically rolls back to thesoftware versions before the ISSU.Change to the automatic rollback interval does not take effect on the ongoing ISSU process.Examples# Set the automatic rollback timer to 50 minutes. system-view[Sysname] issu rollback-timer 50Related commandsissu rollbackissu run switchoverUse issu run switchover to perform a master/subordinate switchover. If the new and old versions areincompatible, this command also upgrades all members that have not been upgraded.Syntaxissu run switchoverViewsUser viewPredefined user rolesnetwork-adminUsage guidelinesUse this command on multichassis IRF fabrics.• For a compatible version, this command performs tasks depending on the ISSU method:{ Incremental upgrade—Performs a process-level master/subordinate switchover for theprocesses to be upgraded.{ Reboot upgrade or ISSU upgrade—Reboots the current master with the old softwareversion, causing the upgraded subordinate member to be elected as the new master.• For an incompatible version, the issu load command splits the IRF fabric into two fabrics, withthe upgraded members forming a new fabric. The issu run switchover command reboots themembers in the old IRF fabric with the upgrade images. After startup, the members join the newIRF fabric as subordinate members.At reboot, a subordinate device automatically synchronizes the master device's configuration andstatus data. You must wait for the synchronization to complete before using the issu run switchovercommand on the subordinate device. To check the synchronization progress, use the display devicecommand. The synchronization is completed when all member device are in normal state.
