Chris/Phil, thanks a lot
Aaron From: Phil Bedard [mailto:phil...@gmail.com] Sent: Wednesday, August 22, 2012 3:29 PM To: Chris Evans Cc: <,cisco-nsp@puck.nether.net>,; Aaron Subject: Re: [c-nsp] traceroute shows mpls labels...how? 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/
