1 8 Traceroute Program. 2 8 Introduction - Problem Wich route do my packets follow towards my destination?

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Presentation transcript:

1 8 Traceroute Program

2 8 Introduction - Problem Wich route do my packets follow towards my destination?

3 8 Traceroute used packets Traceroute program uses : UDP packet destination port > small TTL ICMP time exceeded ICMP port unreachable error

4 8 Traceroute IP Address = ICMP Port Unreachable traceroute UDP, port 33123, TTL=3UDP, port 33123, TTL=2UDP, port 33123, TTL=1 TTL=0

5 8 Command Usage: tracert [-d] [-h maximum_hops] [-j host-list] [-w timeout] target_name Options: -d Do not resolve addresses to hostnames. -h maximum_hops Maximum number of hops to search for target. -j host-list Loose source route along host-list. -w timeout Wait timeout milliseconds for each reply.

6 8 Exercise: Find out about the Traceroute options