Hello Andras,

Long shot but you might need to change the revision for echo packets on
NX-OS to revision 3 (default is 4).

1.configure terminal
2.mpls oam
3.echo revision {3 | 4}
4.echo vendor-extension
5.exit

http://www.cisco.com/en/US/docs/switches/datacenter/sw/5_x/nx-os/mpls/configuration/guide/mp_mpls_ping.html#wp1078363

Interesting read, thanks. But unfortunately that does not change the behaviour.

Best Regards,
Bernhard

On Tue, Mar 12, 2013 at 6:57 PM, Bernhard Schmidt <[email protected]
<mailto:[email protected]>> wrote:

    Hey everyone,

    just a quick question, can anyone confirm or deny that NX-OS 6.1(2) (or
    (3)) MPLS P-Routers do not answer to normal traces with propagate-ttl
    set (which is the default)?

    csr1-kra# traceroute 129.187.0.9
    traceroute to 129.187.0.9 (129.187.0.9), 30 hops max, 40 byte packets
      1  * * *
      2  129.187.0.142 (129.187.0.142) (AS 12816)  1.172 ms  1.404 ms
      0.981 ms
           [Label=1151 E=0 TTL=1 S=1]
      3  * * *
      4  129.187.0.130 (129.187.0.130) (AS 12816)  1.252 ms *  1.735 ms

    csr1-kra# traceroute mpls ipv4 129.187.0.9/32 <http://129.187.0.9/32>

    Tracing MPLS Label Switched Path to 129.187.0.9/32
    <http://129.187.0.9/32>, 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 label entry,
    '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 Ctrl-C to abort.
       0 129.187.0.162 MRU 9216 [Labels: 71 Exp: 0]
    . 1 *
    L 2 129.187.0.142 MRU 9216 [Labels: 65 Exp: 0] 194 ms
    . 3 *
    ! 4 129.187.0.130 2 ms

    Hops 0, 1 and 3 are NX-OS, Hops 2 and 4 are IOS (6500).

    Thanks,
    Bernhard

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