The ifIndex value of the physical switch input port for which this rule applies. Rules that indicate an individual value for this object have a lower precedence in ExtremeWare than rules that specify IP patterns. Conversely, rules that use IP patterns must apply to all physical ports and specify a value of 0 for this object. Any attempt to write a rule that indicates an individual value for this object together with non-default values for any of { extremeQosRuleDestAddrStart, extremeQosRuleDestAddrEnd, extremeQosRuleSrcAddrStart, extremeQosRuleSrcAddrEnd, extremeQosRuleProtocol, extremeQosRuleDestL4PortStart, extremeQosRuleDestL4PortEnd, extremeQosRuleSourceL4PortStart, extremeQosRuleSourceL4PortEnd and extremeQosRuleInPortMask } will be rejected by the agent.