DSCP classification on customer edge links for CCC, TCC, and VPLS

Extends support for DSCP-based behavior aggregate (BA) classification for circuit cross-connect (CCC), translational cross-connect (TCC), and virtual private LAN service (VPLS) on MX Series routers with MPC/MIC interfaces. DSCP-based services provide support for a uniform end-to-end quality-of-service (QoS) model.