HP Cisco Nexus 5000 Cisco MDS 9000 Family CLI Configuration Guide - Release 4. - Page 251

Chapter 8 Software Images Maintaining Supervisor Modules Send documentation comments to [email protected] Replacing Supervisor Modules To avoid packet loss when removing a supervisor module from a Cisco MDS 9500 Series Director, take the supervisor modules out of service before removing the supervisor module. Use the out-of-service command in EXEC mode before removing the supervisor module. out-of-service module slot Where slot indicates the chassis slot number in which the supervisor module resides. Note You must remove and reinsert or replace the supervisor module to bring it into service. Migrating from Supervisor-1 Modules to Supervisor-2 Modules Cisco MDS NX-OS Release 4.1(1a) requires the Supervisor-2 modules on the Cisco MDS 9509 and 9506 Directors both active and standby. You must upgrade from Supervisor-1 modules to Supervisor-2 modules before upgrading to MDS NX-OS Release 4.1(1a) or later, using the Cisco MDS SAN-OS Release 3.3(1c) or earlier. Supervisor-1 modules and Supervisor-2 modules cannot be used in the same switch, except for migration purposes. Both the active and standby supervisor modules must be of the same type, either Supervisor-1 or Supervisor-2 modules. For Cisco MDS 9513 Directors, both supervisor modules must be Supervisor-2 modules. Caution Migrating your supervisor modules is a disruptive operation. When migration occurs from a Supervisor 1 to a Supervisor 2 module, a cold switchover occurs and both modules are reloaded. When the Supervisor 1 attempts to come up as the standby with the Supervisor 2 as the active supervisor, the standby is not brought up. For step-by-step instructions about migrating from Supervisor 1 modules to Supervisor 2 modules, refer to the Cisco MDS 9000 Family NX-OS and SAN-OS Software Upgrade and Downgrade Guide. Note Migrating from Supervisor-2 modules to Supervisor-1 modules is not supported. Standby Supervisor Module Boot Variable Version If the standby supervisor module boot variable images are not the same version as those running on the active supervisor module, the software forces the standby supervisor module to run the same version as the active supervisor module. If you specifically set the boot variables of the standby supervisor module to a different version and reboot the standby supervisor module, the standby supervisor module will only load the specified boot variable if the same version is also running on the active supervisor module. At this point, the standby supervisor module is not running the images set in the boot variables. OL-18084-01, Cisco MDS NX-OS Release 4.x Cisco MDS 9000 Family CLI Configuration Guide 8-33