Index of the DiffServ Class Table row whose class definition is used to specify the policing color exceed mode and value. This identifies incoming traffic categorized as 'yellow' packets in the network. This attribute is only valid if the value of hm2AgentDiffServPolicyAttrStmtEntryType is policeSinglerate(7) or policeTworate(8). The DiffServ class referred to by this object must comply with the following restrictions: 1) Contains only a single, non-excluded match condition identifying one of the following fields: COS, IP DSCP, IP Precedence, or Secondary COS, in accordance with platform support capabilities. This is represented by an hm2AgentDiffServClassRuleMatchEntryType value of cos(1), ipdscp(6), ipprecedence(7), or cos2(15), respectively. 2) Must not conflict with any (non-excluded) match conditions in the classifier used for this policy-class instance, as indicated by the hm2AgentDiffServPolicyInstClassIndex object. 3) The color exceed mode and value identified by this class index must not be the same as an existing color-aware exceed mode and value defined by the hm2AgentDiffServPolicyAttrStmtPoliceColorConformIndex object. A class index value of 0 for this object indicates exceed color awareness is not being used. When the hm2AgentDiffServPolicyAttrStmtPoliceColorConformIndex object is 0, indicating color-blind operation, this object must also be 0. When a non-0 value is used for the hm2AgentDiffServPolicyAttrStmtPoliceColorConformIndex object, this object may remain set to 0 if exceed color awareness is not desired, or may be set to an appropriate class index value to activate exceed color aware mode.