It depends on the implementation of traceroute. There are tools out there that will give you the asn. Then there is the debate on how is that information gathered and the reliability. I will start you here. http://seclists.org/nanog/2005/Mar/337
On Thu, Mar 13, 2014 at 1:52 AM, PlaWanSai RMUTT CPE IX < pws_ad...@thaicpe.com> wrote: > Hi all, > > Why some device can see the ASN? > > > > RP/0/RP0/CPU0:R2-CRS#traceroute > > Wed Mar 12 14:14:00.237 > > Protocol [ipv4]: ipv4 > > Target IP address: www.facebook.com > > Source address: > > Numeric display? [no]: > > Timeout in seconds [3]: > > Probe count [3]: > > Minimum Time to Live [1]: > > Maximum Time to Live [30]: > > Port Number [33434]: > > Loose, Strict, Record, Timestamp, Verbose[none]: > > > > Type escape sequence to abort. > > Tracing the route to 31.13.79.96 > > > > 1 x.19.7.53 3 msec 3 msec 0 msec > > 2 x.19.7.114 3 msec 3 msec > > x.19.7.214 0 msec > > 3 x.19.9.158 30 msec 31 msec 28 msec > > 4 * * > > x.19.9.226 31 msec > > 5 * * * > > 6 * * * > > 7 * * * > > 8 * * * > > > > RP/0/RP0/CPU0:R4-CRS#traceroute > > Wed Mar 12 14:27:33.713 > > Protocol [ipv4]: ipv4 > > Target IP address: www.facebook.com > > Source address: > > Numeric display? [no]: > > Timeout in seconds [3]: > > Probe count [3]: > > Minimum Time to Live [1]: > > Maximum Time to Live [30]: > > Port Number [33434]: > > Loose, Strict, Record, Timestamp, Verbose[none]: > > > > Type escape sequence to abort. > > Tracing the route to 31.13.79.96 > > > > 1 x.19.7.97 4 msec 3 msec 0 msec > > 2 x.19.14.130 0 msec 0 msec > > x.19.14.134 0 msec > > 3 x.19.14.22 3 msec > > x.19.14.142 0 msec > > x.19.14.14 0 msec > > 4 x.19.9.226 31 msec 34 msec 32 msec > > 5 * * * > > 6 * * * > > 7 * > > > > RP/0/RP0/CPU0:R1-CRS#traceroute > > Wed Mar 12 14:27:54.673 > > Protocol [ipv4]: ipv4 > > Target IP address: www.facebook.com > > Source address: > > Numeric display? [no]: > > Timeout in seconds [3]: > > Probe count [3]: > > Minimum Time to Live [1]: > > Maximum Time to Live [30]: > > Port Number [33434]: > > Loose, Strict, Record, Timestamp, Verbose[none]: > > > > Type escape sequence to abort. > > Tracing the route to 31.13.79.96 > > > > 1 * > > x.19.9.158 31 msec 31 msec > > 2 x.79.197.65 27 msec 27 msec 27 msec > > 3 x.13.31.229 27 msec 29 msec 28 msec > > 4 edge-star-shv-09-sin1.facebook.com (31.13.79.96) 27 msec 27 msec 27 > msec > > > > RP/0/RP0/CPU0:R3-CRS#traceroute > > Wed Mar 12 14:28:24.422 > > Protocol [ipv4]: ipv4 > > Target IP address: www.facebook.com > > Source address: > > Numeric display? [no]: > > Timeout in seconds [3]: > > Probe count [3]: > > Minimum Time to Live [1]: > > Maximum Time to Live [30]: > > Port Number [33434]: > > Loose, Strict, Record, Timestamp, Verbose[none]: > > > > Type escape sequence to abort. > > Tracing the route to 31.13.79.96 > > > > 1 * > > x.19.7.81 0 msec 0 msec > > 2 x.19.7.126 2 msec 1 msec > > x.19.7.130 3 msec > > 3 x.19.9.158 31 msec > > x.19.9.150 30 msec > > x.19.9.158 30 msec > > 4 * * * > > 5 * * * > > 6 * * > > > > Microsoft Windows [Version 6.1.7601] > > Copyright (c) 2009 Microsoft Corporation. All rights reserved. > > > > C:\Users\Tat>tracert 31.13.79.96 > > > > Tracing route to edge-star-shv-09-sin1.facebook.com [31.13.79.96] > > over a maximum of 30 hops: > > > > 1 31 ms 31 ms 14 ms x.47.249.65 > > 2 19 ms 19 ms 19 ms x.47.250.177 > > 3 <1 ms <1 ms <1 ms x.47.247.181 > > 4 <1 ms <1 ms <1 ms x.47.247.102 > > 5 49 ms 64 ms 49 ms x.79.197.65 > > 6 44 ms 29 ms 29 ms x.13.31.229] > > 7 46 ms 46 ms 28 ms edge-star-shv-09-sin1.facebook.com > [31.13.79.96] > > > > Trace complete. > > > > C:\Users\Tat> > > > > R3-Kty>tr 31.13.79.96 > > > > Type escape sequence to abort. > > Tracing the route to edge-star-shv-09-sin1.facebook.com (31.13.79.96) > > > > 1 x.19.9.150 28 msec 36 msec 32 msec > > 2 x.79.197.65 32 msec 32 msec 28 msec > > 3 x.13.31.229 [AS 32934] 40 msec 36 msec 32 msec > > 4 edge-star-shv-09-sin1.facebook.com (31.13.79.96) [AS 32934] 32 msec 32 > msec 28 msec > > > > Thank you very much. > > _______________________________________________ > 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/