trace mpls l3vpn


trace mpls l3vpn [ vrf vrfName ]
{ targetAddress targetMask | targetIpv6Prefix }
[ data-size dataSize ]
[ destination startIpAddress endIpAddress increment ]
[ source address sourceAddr ]
[ ttl ttlValue ] [ timeout timeOutVal ]
[ reply mode { ipv4-udp | ipv4-udp-with-router-alert } ]
[ reply pad-tlv ] [ reply dscp trafficClass ]
[ exp-bits bitValue ] [ bottom-label-ttl bottomLabelTtl ] [ detail ]

Release Information

Command introduced in JunosE Release 8.0.0.

data-size keyword and dataSize variable added in JunosE Release 11.1.0.


Sends MPLS echo request packets with successively higher TTL values to the specified L3VPN IP or IPv6 prefix. Discovers the path MPLS packets follow to the destination. There is no no version.

The echo request packet generated by this command contains either the VPN IPv4 sub-TLV or VPN IPv6 sub-TLV described in RFC 4379—Detecting Multi-Protocol Label Switched (MPLS) Data Plane Failures (February 2006). Which sub-TLV is included depends on whether the trace is intended for an IPv4 prefix or an IPv6 prefix.

You can use this command to send a request to a VPNv4 prefix in the specified VRF. If you do not specify a VRF, then you must issue the command from the VRF context. In either case, the trace originates from the parent router.



Privileged Exec, User Exec

Related Documentation