Just the probe packets differ in protocol the responses are always ICMP responses.
Phil Sent from my iPad On Aug 22, 2012, at 4:03 PM, Chris Evans <chrisccnpsp...@gmail.com> wrote: > Also this depends on vendor too. IIRC junos uses udp for its trace routing > and ios uses icmp. Meaning that if you did traceroute from a cisco box > going over a juniper network the labels wouldn't show and vice versa. You > brought up something I was 100% suee about a few years ago but those brain > cells are gone. > > On Aug 22, 2012 2:58 PM, "Phil Bedard" <phil...@gmail.com> wrote: > There are ICMP extensions to carry MPLS label stack information but the trace > route application needs to support it. The windows client doesn't. > > Phil > > Sent from my iPad > > On Aug 22, 2012, at 3:21 PM, "Aaron" <aar...@gvtc.com> wrote: > > > Do you all know how this works? How is traceroute able to report back the > > mpls label that is in use in the transit hops? Also wondering why I don't > > see this on windows command line tracert > > > > > > > > Aaron > > > > > > > > > > > > RP/0/RSP0/CPU0:9k#trace vrf one 1.2.3.4 source 2.4.6.8 > > > > > > > > 1 19.1911.5 [MPLS: Labels 16001/16220 Exp 0] 2 msec 1 msec 0 msec > > > > 2 19.1911.1 [MPLS: Label 16220 Exp 0] 0 msec 0 msec 1 msec > > > > 3 88.88.191.22 0 msec 0 msec > > > > 19.1911.33 1 msec > > > > 4 88.88.191.18 1 msec 1 msec 0 msec > > > > 5 88.88.135.221 10 msec 10 msec 11 msec > > > > 6 122.47.236.130 [MPLS: Label 17039 Exp 1] 47 msec 49 msec 51 msec > > > > 7 122.47.154.53 [MPLS: Labels 0/17017 Exp 1] 48 msec 49 msec 47 msec > > > > 8 122.45.30.134 [MPLS: Labels 23417/17016 Exp 1] 48 msec 49 msec 47 msec > > > > 9 122.45.1.17 [MPLS: Labels 23439/17016 Exp 1] 50 msec 49 msec 51 msec > > > > 10 122.45.31.189 [MPLS: Labels 0/17016 Exp 1] 51 msec 54 msec 51 msec > > > > 11 122.45.158.34 [MPLS: Labels 0/16009 Exp 1] 49 msec 50 msec 47 msec > > > > 12 122.45.104.49 46 msec 46 msec 47 msec > > > > 13 122.45.108.14 47 msec 47 msec 47 msec > > > > 14 * * * > > > > 15 * * * > > > > 16 * > > > > > > > > _______________________________________________ > > cisco-nsp mailing list cisco-nsp@puck.nether.net > > https://puck.nether.net/mailman/listinfo/cisco-nsp > > archive at http://puck.nether.net/pipermail/cisco-nsp/ > > _______________________________________________ > cisco-nsp mailing list cisco-nsp@puck.nether.net > https://puck.nether.net/mailman/listinfo/cisco-nsp > archive at http://puck.nether.net/pipermail/cisco-nsp/ _______________________________________________ cisco-nsp mailing list cisco-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/cisco-nsp archive at http://puck.nether.net/pipermail/cisco-nsp/