How to check the IB cables is latched properly in DB/Storage nodes in Exadata .

for ib_cable in `ls /sys/class/net | grep ^ib`; do printf "$ib_cable: "; cat /sys/class/net/$ib_cable/carrier; done

The output should look similar to:

ib0: 1
ib1: 1

If anything other than "1" is reported, double check the cable connection.

Regards
Gurudatta N.R