This is the identifier of the peer port.
If the peer port is channel, as described
by the instance of cficonRunCfgUnitType, then
cficonRunCfgPortId will be the CHPID (Channel
Path Identifier) of the channel path that
contains this peer port.
If the peer port is controlUnit, then
cficonRunCfgPortId will be 0.
If the peer port is fabric, then
cficonRunCfgPortId will be port address of the
interface on the peer switch.