An MPLS-based ACL defines rules to filter packets.
As shown in Figure 1, an MPLS-based ACL is created for QoS services on Device D to allow Device D to allocate 54000 bit/s bandwidth to the MPLS packets with an EXP value smaller than 3 sent from Network A and to allocate 8000 bit/s bandwidth to the MPLS packets with an EXP value greater than 3 sent from Network B.