[c-nsp] NX-OS MPLS not answering to traces

[Tóth András]

Hi Bernhard,

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

Best regards,
Andras



On Tue, Mar 12, 2013 at 6:57 PM, Bernhard Schmidt <berni at birkenwald.de>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
>
> Tracing MPLS Label Switched Path to 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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