ibfindnodesusing.pl uses ibroute and detects the current nodes which are routed
through both directions of the link specified. The link is specified by one
switch port end; the script finds the remote end automatically.
Recalculate the ibnetdiscover information, ie do not use the cached
information. This option is slower but should be used if the diag tools have
not been used for some time or if there are other reasons to believe that
the fabric has changed.