Configure Input SCU on the vt Interface of the Egress PE Router

To enable SCU in a Layer 3 VPN, configure source class usage on the virtual loopback tunnel (vt) interface of the egress provider edge (PE) router equipped with a Tunnel PIC. The interface is equivalent to the inbound SCU interface, so use the input statement at the [edit interfaces vt-interface-number unit 0 family inet accounting source-class-usage] hierarchy level:

[edit]

interfaces

    vt-0/3/0 {

        unit 0 {

            family inet {

                accounting {

                    source-class-usage {

                        input;

                    }

                }

            }

        }

    }

}