Should be BE, the question is about MDS 9000 not Nexus.
"You can upgrade each module only when it is online. The EPLD upgrade is only disruptive to the module being upgraded."
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/mds9000/sw/8_x/release_notes/epld/epld_rn_8x.html
I agree. Moreover, this links states
In Cisco MDS 9000 Director Switches, EPLD upgrade or downgrade can only be executed from the active supervisor module.
But the answer option C states "...ON the active supervisor"
So B and E are correct in my opinion.
Guidelines and Limitations
When you upgrade or downgrade the EPLDs, observe the following guidelines and limitations:
You can upgrade each module only when it is online. The EPLD upgrade is only disruptive to the module being upgraded.
If you interrupt an EPLD upgrade or downgrade, the module must be upgraded again.
In Cisco MDS 9000 Director Switches, EPLD upgrade or downgrade can only be executed from the active supervisor module. To upgrade the supervisor EPLDs nondisruptively, upgrade the standby supervisor and then switchover. After the new standby supervisor is online its EPLDs can be upgraded.
In Cisco MDS 9000 Series Fabric Switches, be sure to specify 1 as the module number. The switch must be power cycled for the EPLDs to start running the new code.
B and E are correct, A is wrong (reference DCCOR CHapter 10 p503):
Update the EPLD on the standby supervisor module. From the active supervi-
sor module, so you must perform the upgrade from the active and not the standby supervisor
B&E.
You can upgrade each module only when it is online.
In Cisco MDS 9000 Director Switches, EPLD upgrade or downgrade can only be executed from the active supervisor module.
AB should correct according to this.
"On a Cisco Nexus 9500 platform switch that has two supervisor modules, upgrade the EPLDs for the standby supervisor and then switch the active supervisor to the standby mode to upgrade its EPLDs. The supervisor switchover is not disruptive to traffic on Cisco Nexus 9500 platform switches. On a switch that has only one supervisor module, you can upgrade the active supervisor, but this will disrupt its operations during the upgrade."
Under Installation guidelines.
https://www.cisco.com/c/en/us/td/docs/switches/datacenter/nexus9000/sw/92x/epld-rn/nxos_n9K_epldRN_924.html
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