Traceroute MPLS LDP Tunnel

Traceroute to a remote host for a MPLS label switched path (LSP) signaled by the LDP.

  1. Initiate traceroute request at ingress router of an LDP tunnel. 
    device# traceroute
  2. Handle incoming traceroute request at a transit node of an LDP tunnel (router-alert).
  3. Handle incoming traceroute request at the egress node of an LDP tunnel.
  4. Handle traceroute reply at the ingress router of an LDP tunnel.

Example

device# traceroute mpls ldp 130.130.130.1

Trace LDP LSP to 130.130.130.1/32, timeout 5000 msec, TTL 1 to 30

Type Control-c to abort
 1  3ms 120.120.120.1 return code 8(Transit)
 2  1ms 130.130.130.1 return code 3(Egress)

Trace LDP LSP to 130.130.130.1/32, timeout 5000 msec, TTL 1 to 30

Type Control-c to abort
 1  1ms 120.120.120.1 return code 8(Transit)
 2  2ms 130.130.130.1 return code 3(Egress)
9036674-01 Rev AA