TCP/IP command. Trace route taken by packets to reach network host. traceroute attempts tracing by launching UDP probe packets with a small TTL (time-to-live), then listening for an ICMP “time exceeded” reply from a gateway. host is the destination hostname or the IP number of the host to reach. packetsize is the packet size in bytes of the probe datagram. Default is 40 bytes.
Force IPv4 or IPv6 tracerouting.
Perform AS path lookups.
Turn on socket-level debugging.
Show ICMP extensions.
Set the initial time-to-live to n hops.
Set the “don’t fragment” bit.
Enable the IP LSRR (Loose Source Record Route) option in addition to the TTL tests, to ask how someone at IP address addr can reach a particular target.
Specify the network interface for getting the source IP address for outgoing probe packets. Useful with a multihomed host. Also see the -s option.
Use ICMP ECHO requests instead of UDP datagrams.
Set maximum time-to-live used in outgoing probe packets to max-ttl hops. Default is 30.
Show numerical addresses; do not look up hostnames. (Useful if DNS is not functioning properly.)
Send n probe packets simultaneously. The default is 16.
Set base UDP port number used for probe packets to port. Default is (decimal) 33434.
Set number of probe packets per hop to the value n. Default is 3.
Bypass normal routing tables and send directly to a host on an attached network. ...