MPLS ping and traceroute

The ACX Series routers supports MPLS ping and traceroute to the extent supported by Junos OS. Junos OS partially supports LSP ping and traceroute commands based on RFC 4379, Detecting Multi-Protocol Label Switched (MPLS) Data Plane Failures. However, Junos OS supports this functionality on LSP transit routers and head-end routers only. If a ping or traceroute command is issued from a router that fully supports RFC 4379, it can propagate correctly on routers running Junos OS.