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19-13
Cisco MDS 9000 Family Fabric Manager Configuration Guide
OL-17256-03, Cisco MDS NX-OS Release 4.x
Chapter 19 Managing Modules
Managing SSMs and Supervisor Modules
Managing SSMs and Supervisor Modules
This section describes the considerations for replacing SSMs and supervisor modules and for upgrading
and downgrading Cisco MDS NX-OS and SAN-OS releases.
Considerations for Replacing SSMs and Supervisor Modules
If you replace an SSM or supervisor module, you should consider the following:
• If you replace an SSM with another SSM and the boot image is on bootflash:, respectively, you can
leave the boot image installed on the active supervisor.
• If you replace an SSM with another SSM and the SSI boot image is on the modflash:, the SSM might
not initialize. See the “Recovering an SSM After Replacing Corrupted CompactFlash Memory”
section on page 19-33.
• If you replace an SSM with any other module, you can leave the boot image installed on the active
supervisor or remove it. The active supervisor module detects the module type and boots the module
appropriately.
• If you replace a supervisor module in a switch with active and standby supervisors, no action is
required because the boot image is automatically synchronized to the new supervisor module.
• If you replace a supervisor module in a switch with no standby supervisor, you need to reimplement
the configuration on the new supervisor.
Default Settings
Table 19-9 lists the default settings for the supervisor module.
Table 19-10 lists the default settings for the SSM.
Table 19-9 Default Supervisor Module Settings
Parameters Default
Administrative connection Serial connection.
Global switch information
• No value for system name.
• No value for system contact.
• No value for location.
System clock No value for system clock time.
In-band (VSAN 1) interface IP address, subnet mask, and broadcast address assigned to the
VSAN are set to 0.0.0.0.
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