Cisco Nexus - Manually Set Port Speed to 40G or 100G

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I had an issue during a Cisco Nexus 3132 to N9K-C9336C-FX2 cluster switch upgrade, where a couple of the 40G (copper cable/twinax) connections failed to come up. And I had to manually configure port speed. For reference, here are the commands for setting 40G or 100G:

IMPORTANT NOTES: In certain conditions, N9K-C9336C-FX2 may not be able to auto-negotiate port speed correctly, and port speed has to be manually set in config mode:

SWITCH# configure
SWITCH (config)# int e1/1
SWITCH (config-if)# speed 40000
SWITCH (config-if)# exit
SWITCH (config)# exit
SWITCH# copy run start

SWITCH# configure
SWITCH (config)# int e1/1
SWITCH (config-if)# speed 100000
SWITCH (config-if)# exit
SWITCH (config)# exit
SWITCH# copy run start




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