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 that is either configured for or 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;
- }
- }
- }
- }
- }
- }