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Cisco Bug: CSCun26256 - Do not print MPLS labels in traceroute for MPLS TE

Last Modified

Jun 07, 2018

Products (1)

  • Cisco Network Convergence System 6000 Series Routers

Known Affected Releases

5.2.1.CE

Description (partial)

Symptom:
The current behavior for TE traceroute is:

Example 1:
RP/0/RSP0/CPU0:9K_D6#traceroute mpls traffic-eng tunnel-te 0
Thu Feb 13 23:20:42.011 UTC

Tracing MPLS TE Label Switched Path on tunnel-te0, timeout is 2 seconds

Codes: '!' - success, 'Q' - request not sent, '.' - timeout,
  'L' - labeled output interface, 'B' - unlabeled output interface,
  'D' - DS Map mismatch, 'F' - no FEC mapping, 'f' - FEC mismatch,
  'M' - malformed request, 'm' - unsupported tlvs, 'N' - no rx label,
  'P' - no rx intf label prot, 'p' - premature termination of LSP,
  'R' - transit router, 'I' - unknown upstream index,
  'X' - unknown return code, 'x' - return code 0

Type escape sequence to abort.

  0 11.0.56.3 MRU 1500 [Labels: 269028 Exp: 0]
L 1 11.0.56.2 MRU 1500 [Labels: 283302 Exp: 0] 2 ms
L 2 11.0.15.2 MRU 1500 [Labels: implicit-null Exp: 0] 2 ms
! 3 11.255.255.4 2 ms

Example 2:
RP/0/RSP0/CPU0:9K_D2#traceroute ipv6 2001:db8:255:255::6
Fri Feb 14 00:16:26.586 UTC

Type escape sequence to abort.
Tracing the route to 2001:db8:255:255::6

 1  2001:db8:255:255::1 [MPLS: Labels 257971/2 Exp 0] 3 msec 2 msec 2 msec
 2  2001:db8:255:255::5 [MPLS: Labels 34537/2 Exp 0] 2 msec 2 msec 2 msec
 3  2001:db8:0:56::3 3 msec 3 msec 3 msec

Conditions:
This is a feature enhancement request for 5.1.1. This is a feature enhancement request to disable label extension (MPLS Response) for MPLS TE.
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