Cisco Access Control List QoS If Operation Trust State

1.3.6.1.4.1.9.9.179.1.2.1.1.5

This object is used to indicate the operational trust state of an interface. The operational trust state may or may not be identical to the config trust state denoted by caqIfTrustStateConfig. The value of this object depends on the runtime conditions such as whether the interface is configured to trust a certain type of device as denoted by caqIfTrustDevice as well as whether a device of the trusted type is connected to the interface. For example, if the interface is configured to only trust Cisco IP Phone and the phone is not connected to the interface at runtime, the operational trust state of this interface will have the untrusted(1) value even if the trustCoS(2) value is configured in caqIfTrustStateConfig. This object is only instantiated if the platform supports trust device configuration. If the object is untrusted(1), then the DSCP assigned to the packet is the DSCP specified by classification rule obtained from the matching ACE (Access Control Entry). ACE is a filter that is used to identify flows with certain characteristics. It includes fields such as ingress/egress ports, L2 addresses, L3 addresses , TCP/UDP port number. If this object is trustCoS(2), then the DSCP assigned to the packet is the layer2 CoS of the packet mapped to a DSCP by the CoS-to-DSCP mapping defined in object caqCosToDscpDscp. When this object is trustIpPrec(3), a DSCP is assigned to an IP packet according to the IP-Precedence-to-DSCP mapping defined by the values contained in caqIpPrecToDscpTable. For non-IP packets, trustIpPrec(3) has identical behavior as trustCoS(2). When this object is trustDscp(4), the DSCP contained in an IP packet is trusted as being the correct value to assign to it. For non-IP packets, trustDscp(4) has identical behavior as trustCoS(2).