When attaching an Ethernet switch to the Ethernet overlay network ports of the leaf switch, the link status as viewed from the IB switch chip might contradict that as seen by the Ethernet switch. For example, the IB switch chip might report the link in a down state, while the Ethernet switch reports the link in an up state.
Workaround: Reset the suspect port on the IB switch chip.
At the Oracle Fabric OS command line, type:
[OFOS] set port port up gw -s 10g
where port is the suspect port number.