• Supervisor A (N9K-SUP-A) modules with four cores, 4 executable threads, 16 GB of memory, and 64
GB of SSD)
• Supervisor A+ (N9K-SUP-A+) with four cores, 8 executable threads, 1.8 GHz, 16 GB of memory, and
64 GB of SSD
• Supervisor B (N9K-SUP-B) with six cores, 12 executable threads, 2.2 GHz, 24 GB of memory, and 256
GB of SSD
• Supervisor B+ (N9K-SUP-B+) with six cores, 12 executable threads, 1.9 GHz, 32 GB of memory, and
256 GB of SSD
When a switch has two supervisors, one supervisor is automatically active while the other is in standby mode.
If the active supervisor goes down or is disconnected for replacement, the standby supervisor automatically
becomes active. If you replace one of two installed supervisor modules with another module, you can do so
without interrupting operations. The supervisor that you are not replacing becomes the active supervisor and
retains the kickstart configuration while you replace the other supervisor. If the switch has just one supervisor,
you can install the new supervisor in the open supervisor slot during operations. You can make that supervisor
active after the installation.
If there are two supervisors that are installed in the chassis, both must be the same type as shown in the
following table:
Table 3:
Is Combination Allowed?Standby SupervisorActive Supervisor
YesSupervisor ASupervisor A
YesSupervisor BSupervisor B
YesSupervisor A+Supervisor A+
YesSupervisor B+Supervisor B+
Note
Supervisor modules are automatically powered up and started with the switch.
To understand the terms that are used for the supervisors, see the following table.
DescriptionUsageModule Terms
• Module-27 refers to the supervisor module in chassis
slot 27 (labeled as SUP 1 on the chassis).
• Module-28 refers to the supervisor module in chassis
slot 28 (labeled as SUP 2 on the chassis).
Fixedmodule-27 and module-28
• sup-1 refers to the supervisor module in the SUP 1 slot
(slot 27 in the CLI output).
• sup-2 refers to the supervisor module in the SUP 2 slot
(slot 28 in the CLI output.
Fixedsup-1 and sup-2
Cisco Nexus 9508 NX-OS Mode Switch Hardware Installation Guide
66
Managing the Switch
Overview of Supervisor Modules
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