tmnxOamIcmpTrLabelStackEntry contains the information present in one member of an RFC 4950 MPLS Label Stack Object, as received in one ICMPv4 or ICMPv6 reply (received in response to a locally initiated 'icmpTraceRoute(5)' test). One ICMPv4 or ICMPv6 reply can contain at most one MPLS Label Stack Object. The MPLS Label Stack Object is a structure in the reply, containing the MPLS encapsulation used for the test. One MPLS Label Stack Object contains one or more members. The first six indices specify the ICMPv4 or ICMPv6 reply. The seventh index specifies the member number within the MPLS Label Stack Object. SROS creates rows in this table when an ICMPv4 or ICMPv6 reply is received (in response to a locally initiated 'icmpTraceRoute(5)' test) containing an MPLS Label Stack Object. One row is created for each member in the MPLS Label Stack Object. SROS destroys rows in this table when the corresponding tmnxOamTrProbeHistoryTable row is destroyed.