When displaying IB path information between hosts, you will list two hosts. To determine the direction of traffic, the first host listed is the from host, and the second host listed is the to host. For example, to display traffic from a host named bones to a server named riker, you would list bones first in the command syntax.
IB path information is displayed for QDR and EDR fabrics. Look for Qdr or Edr as needed for your fabric type.
show diagnostics pvi-path from-server to-server
You might see multiple entries (including any intervening IB switches) listed in the output.