Nexus 9K %ETHPORT-5-IF_DOWN_LINK_FAILURE when connected to a device with fixed speed

I connected an HP C7000 On Board Administrator to a Cisco Nexus 93108 switch and the port wouldn't come up. Nothing at all happened actually, no link light, no log entry, nothing.

The OBA was configured for 100Full and I configured the Nexus like this:
interface Ethernet1/38
  switchport access vlan 238
  speed 100
  duplex full
  logging event port link-status

The OBAs are hot-swappable, if I pulled it out, waited a couple seconds and then reseated it, the link would come up briefly and then go down. The following messages were displayed:

2018 Apr 10 12:25:41 TEST-93108TC %ETHPORT-5-SPEED: Interface Ethernet1/38, operational speed changed to 100 Mbps

2018 Apr 10 12:25:41 TEST-93108TC %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/38, operational duplex mode changed to Full

2018 Apr 10 12:25:41 TEST-93108TC %ETHPORT-5-IF_UP: Interface Ethernet1/38 is up in mode access

2018 Apr 10 12:26:03 TEST-93108TC %ETHPORT-5-IF_DOWN_LINK_FAILURE: Interface Ethernet1/38 is down (Link failure)

You can see that the link would come up, set to 100Full and then go down within 30 seconds.

The solution

It turns out that setting the port using "speed 100" or "speed 1000" and duplex full doesn't disable negotiation. You need to enter:

no negotiation auto

in the configuration of the port.
interface Ethernet1/38
  switchport access vlan 238
  speed 100
  duplex full
  no negotiation auto
  logging event port link-status

The other option was to get credentials for the OBA and set it to auto. Once I did that and removed the no negotiation auto the port came up at 1000 full and stayed up.

interface Ethernet1/38

  switchport access vlan 238

  logging event port link-status

2018 Apr 10 12:27:16 TEST-93108TC %ETHPORT-5-SPEED: Interface Ethernet1/38, operational speed changed to 1 Gbps

2018 Apr 10 12:27:16 TEST-93108TC %ETHPORT-5-IF_DUPLEX: Interface Ethernet1/38, operational duplex mode changed to Full

2018 Apr 10 12:27:16 TEST-93108TC %ETHPORT-5-IF_UP: Interface Ethernet1/38 is up in mode access