The list of physical switch input ports which further
qualifies an IP flow. This object is an octet string
with the MSB of octet 0 indicating port 0 and LSB indicating
port 7. Similarly, the MSB of octet 1 indicates port 8 and it's
LSB indicates port 15 and so on. The port numbers are 0-based.
This object has no meaning for rules defined on physical ports
that are not associated with an IP flow. Port based rules can be
defined by assigning a non zero value to extremeQosRuleInPort. Any
attempt to set this value without specifying the source/destination
address range and/or source/destination l4 port range will be rejected
by the agent. For IP flows that apply to all physical ports
in the switch, this will be a zero length octet string.