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Nexus 9K installing second Supervisor

we need to add a second Supervisor to a operational Nexus 9504. Nexus 9504 Hardware installation guide says it can be installed  operational chassis without any interruption. Do two supervisor have to have the same nx-os version at the beginning? what is order of procedure as soon as we install second supervisor?

1 Reply 1

Manish Gogna
Cisco Employee
Cisco Employee

Hi Mehmet,

The procedure of installing a second supervisor is covered in detail here

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/hw/n9504_hig/b_n9504_hardware_install_guide/b_n9504_hardware_install_guide_chapter_0110.html#task_2893F5DDB2BC470F8EF7DA5E9D63A52D

Additionally, two supervisor modules are available for the Cisco Nexus 9000 Series switches: Supervisor A (SUP A) and Supervisor B (SUP B). The following table lists the differences between the two modules.

Supervisor A

Supervisor B

CPU

4 core, 1.8 GHz

6 core, 2.1 GHz

Memory

16 GB

24 GB

SSD storage

64 GB

256 GB

Software release

6.1(2)I1(1) or later release

6.1(2)I3(1) or later release

SUP A and SUP B are not compatible and should not be installed in the same chassis, except for migration purposes. For dual supervisor systems, you should install either two SUP A modules or two SUP B modules (and not a combination of the two) to ensure supervisor module redundancy.

In a dual supervisor system, Cisco NX-OS checks the memory size of both the active and standby supervisors. If the memory size is different for each supervisor (because both SUP A and SUP B are installed), a message appears instructing you to replace SUP A with a second SUP B.

To migrate from SUP A to SUP B, insert SUP B into the device and enter the system switchover command. SUP B becomes the active supervisor, and SUP A becomes the standby supervisor, which is not a supported configuration. A warning message appears every hour until you remove SUP A or replace it with a second SUP B.

http://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/7-x/high_availability/guide/b_Cisco_Nexus_9000_Series_NX-OS_High_Availability_and_Redundancy_Guide_7x/b_Cisco_Nexus_9000_Series_NX-OS_High_Availability_and_Redundancy_Guide_7x_chapter_0101.html

HTH

Manish

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