Difference between revisions of "Traceroute"

Revision as of 16:37, 2 May 2012

Traceroute is a command-line tool that can be used to identify all of the routing hops between two hosts by intentionally exceeding response time from every gateway to a destination. It's usefulness is shown when you need to find an intermediate server for information gathering, or for checking where in a network a site is failing or bottlenecking.

Performing a Traceroute

To perform from windows: from a command prompt type

To perform in a Linux/Unix Terminal type

Example of Tracert

 1     6 ms     4 ms     1 ms  192.168.0.1
 2    49 ms    33 ms    40 ms  123.123.123.123
 3    84 ms   173 ms   107 ms  172.11.11.11
 4    43 ms    84 ms    57 ms  172.22.22.22
 5     *       70 ms   136 ms  110.110.110.110
 6    86 ms    31 ms    33 ms  203.203.11.11
 7   170 ms     *       83 ms  203.203.22.22
 8   117 ms    68 ms    88 ms  74.125.50.1
 9   109 ms    69 ms    73 ms  66.249.50.1
10    85 ms    73 ms   152 ms  72.14.237.47
11     *      123 ms   107 ms  74.125.237.9

This example shows 3 trace packets being sent, resulting in 3 columns of time between each hop. When the trace fails to reach its destination or expires, an asterisk appears in the appropriate column. Also note that in this example, there are 11 hops with the first being the router and the last being the destination (google.com).

Options for Tracert

• -d
  • Do not resolve addresses of router interfaces to host names.

     E.g: wwwcomcast-vip.westchester.pa.bo.comcast.net [69.241.45.4] becomes 69.241.45.4.

• -h < maximum_hops >
  • Limits number of hops to get to the specified domain.
• -j < host_list >
  • Loose source routing along the host-list (IPV4-only).
• -w < timeout >
  • Wait timeout milliseconds for each reply.
• -R
  • Trace round-trip path (IPV6-only).
• -S < srcaddr >
  • Source address to use (IPV6-only).
• -4
  • Force IPV4
• -6
  • Force IPV6

Example of Traceroute

  traceroute to www.yahoo.com (69.147.114.210), 30 hops max, 40 byte packets

1 10.2.71.1 (10.2.71.1) 21.965 ms 22.035 ms 22.111 ms 2 (ISP) (ISP gateway) 22.510 ms 25.716 ms 26.073 ms 3 61.246.224.209 (61.246.224.209) 69.212 ms 59.778 ms 63.334 ms 4 59.145.6.1 (59.145.6.1) 65.632 ms 64.750 ms 64.868 ms 5 59.145.11.69 (59.145.11.69) 63.562 ms 64.219 ms 63.742 ms 6 203.208.143.241 (203.208.143.241) 318.632 ms 307.733 ms 316.650 ms 7 203.208.149.25 (203.208.149.25) 317.534 ms 308.116 ms 307.507 ms 8 203.208.186.10 (203.208.186.10) 245.835 ms 247.878 ms 248.862 ms 9 so-1-1-0.pat1.dce.yahoo.com (216.115.101.129) 286.774 ms 289.702 ms so-1-1-0.pat2.dce.yahoo.com (216.115.101.131) 326.470 ms 10 ge-2-1-0-p141.msr1.re1.yahoo.com (216.115.108.19) 324.044 ms 324.497 ms 326.011 ms 11 ge-1-32.bas-a1.re3.yahoo.com (66.196.112.35) 333.479 ms 333.019 ms ge-1-41.bas-2.re3.yahoo.com (66.196.112.201) 292.967 ms 12 * * * 13 * * * 14 * * * 15 * * *

Options for Traceroute