Set forwarding class and DSCP value for Routing Engine-generated traffic

You can set the forwarding class and DSCP value for traffic originating in the Routing Engine to prioritize control plane protocol packets across your network. You apply an output firewall filter to the loopback interface, specifying the forwarding class and DSCP bits for each protocol type, which overrides the global host-outbound-traffic defaults for Routing Engine-sourced traffic only without affecting transit or incoming traffic. This benefits you by enabling granular, per-protocol queue and marking control, ensuring critical traffic such as routing protocol packets receives appropriate treatment at egress.