Class Based Forwarding (CBF) is a means for steering IP traffic into colored tunnels based on the ingress DSCP values.  CBF may be used with SR-TE Policy or RSVP-TE colored tunnels.

In the 7280R3/7500R3/7800R3 platform, EXP rewrite for IP-MPLS routed flows is derived from the DSCP of the packet. Using Qos Policy map , DSCP can be set as needed. But in this process, the egress IP TOS was also changed, which may cause issues later at customer edge. 

By default, the DSCP and ECN bits of VXLAN bridged packets are not rewritten. Currently, for bridged packets undergoing VXLAN encapsulation, the DSCP in the outer IP header is derived from TC and the ECN bits are set to zero. The desired behavior is that the outer IP header should be remarked with ingress packet DSCP and ingress packet ECN. Also, local congestion should be handled correctly.

The differentiated services code point (DSCP) is a 6 bit field in the IP header, which can be used to mark traffic for

The feature allows to create a named TC to DSCP mapping that can be applied on an interface.DSCP of routed packets egressing out of the interface will be rewritten according to the map.

This article describes the support for specifying DSCP mask in IPv4 access list. DSCP mask can be used to match

This feature allows selecting Differentiated Services Code Point (DSCP) and Traffic Class (TC) values for packets