iblinkinfo.pl reports the link info for each port of each switch active in the
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 the
fabric has changed.
Output only the switch specified by <guid> (hex format)
Output only the switch specified by the direct route path.
Print all information for each link on one line. Default is to print a header
with the switch information and then a list for each port (useful for grep'ing output).
Print only switches which have a port in the "Down" state.