Nexus 9232C ports functionality

[bigmadstu]

Hi, I've been using, testing and updating Nexus switches for a few years now but this problem has me stumped.

I have several N9K-C9232Cs. Plan is to do a basic functionalty test, update them and deploy.

They are currently running NXOS 9.3.9 and are in very good cosmetic condition.

All seems fine until I get to port testing. The only config is "no shut" to all the ports and then I loopback them with a DAC cable.

Ports 1 - 6 and 27 -32 see the cable but don't bring the link up. Ports 7 - 26 bring the link up no problem.

I've compared the "show interface" for the ports and they all seem to have the same characteristics.

This problem / feature isn't confined to 1 switch. I have several.

I realise this an uncommon switch and I have no support coverage on it. Hoping sombody here has seen similar and can point me in the right direction.

Kind regards

Stuart

[MHM Cisco World]

can we see both show interface ?

[bigmadstu]

Hi, thanks for the reply. Attached are show interface from ports 6&7 with no DAC, 5&6 with DAC and 7&8 with DAC.

Kind regards

Stuart

[MHM Cisco World · Accepted solution]

auto-duplex, auto-speed, media type is 10G

32-port 40/100G QSFP28 ports and 2-port 1/10G SFP+ ports

there is something wrong I think in Speed.

try hardcode for one port and see if it work.

[bigmadstu]

Hi, thanks for the advise, you are correct. I set the port speeds to 40000 matching the DAC cable and we have a link.

Most appreciated.

Kind regards

Stuart

[balaji.bandi]

Look at port charactersticks :