Network design software

The LAN edge of the network design software can have egress and ingress policies. Because you have been dealing with egress policies since the WAN/branch discussion began, and because the egress policies are not only optional, but also considerably simpler, they are discussed first.
As previously mentioned, it is better to mark at Layer 3 (DSCP) instead of Layer 2 whenever possible because Layer 2 markings are lost when the transmission medium changes. This is the case with any Ethernet 802.1Q/p CoS values that have been set within the campus and are carried over a WAN (or VPN). In some cases, network administrators prefer to have these markings restored at the branch; DSCP-to-CoS mapping then can be performed on the branch router's LAN edge.