Monday, November 19, 2012, 15:24
Solution ID: 00000163
How to diagnose connectivity issues using the TraceRoute Tool.
The TraceRoute Tool is used to trace the route (path) of network packets travelling between two computers. Similar to the Ping Tool, TraceRoute sends ICMP packets from a source computer to a target computer and any intermediate hosts. The IP address and hostname of each host are listed (if available), along with the return time in milliseconds. This tool can be useful in identifying where a problem may exist when network connectivity is broken between two networked computer systems.
Each intermediate host (called a "hop") in the route is numbered and displayed. The sequence number, hostname, IP address and packet times (3 packet response times displayed). If information can not be gathered for a hop, an asterisk '*' is displayed for each packet sent (i.e. "* * *").
Example: Tracroute to www.google.com
traceroute to www.google.com (184.108.40.206), 30 hops max, 40 byte packets 1 * * * 2 gw-google.torontointernetxchange.net (220.127.116.11) 1.890 ms 2.307 ms 1.921 ms 3 18.104.22.168 (22.214.171.124) 2.315 ms 126.96.36.199 (188.8.131.52) 2.091 ms 184.108.40.206 (220.127.116.11) 2.063 ms 4 18.104.22.168 (22.214.171.124) 17.991 ms 17.943 ms 17.904 ms 5 126.96.36.199 (188.8.131.52) 28.114 ms 184.108.40.206 (220.127.116.11) 29.377 ms 18.104.22.168 (22.214.171.124) 29.329 ms 6 126.96.36.199 (188.8.131.52) 38.218 ms 38.764 ms 184.108.40.206 (220.127.116.11) 38.738 ms 7 18.104.22.168 (22.214.171.124) 38.699 ms 38.668 ms 38.635 ms 8 126.96.36.199 (188.8.131.52) 38.601 ms 38.666 ms 38.255 ms 9 den03s06-in-f19.1e100.net (184.108.40.206) 38.256 ms 38.214 ms 38.177 ms
This information is extremely useful when trying to diagnose connectivity issues between servers.
Packet latency varies depending on the quality of the Internet / network connection. A good broadband Internet connection (wired or wireless) typically results in ping test latency of less than 100 ms, often less than 30 ms. A satellite Internet connection normally suffers from latency above 500 ms.
Note: Some network devices, including firewalls, may disable ping packet responses or even block the ICMP protocol, used to send ping network packets. When this occurs TraceRoute will display a series of asterisks (i.e. "* * *").
The PerfectMail™ TraceRoute Tool allows administrators to trace the route of network packets sent from your PerfectMail server to another Internet host. On the "Tools => TraceRoute" menu item enter the host name or IP address want to perform a trace route to and click the "Trace Route" button.
Tags: mail, server, host, connectivity, network, packet, diagnostics, traceroute, ping
Link to this article: http://perfectmail.com/kb/traceroute_tool_network_diagnostics
Updated: Monday, November 19, 2012, 15:24
-- David Rutherford