Dell PowerConnect 3448 Command Line Interface (CLI) Guide (.htm) - Page 367
The default maximum TTL value is 30.
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traceroute The traceroute User EXEC mode command discovers routes that packets actually take when traveling to their destination. Syntax traceroute {ip-address |hostname }[size packet_size] [ttl max-ttl] [count packet_count] [timeout time_out] [source ip-address] [tos tos] • ip-address - IP address of the destination host. • hostname - Host name of the destination host. (Range: 1-158 characters) • packet_size - Number of bytes in a packet. (Range: 40-1500) • max-ttl - The largest TTL value that can be used. The traceroute command terminates when the destination is reached or when this value is reached. (Range:1-255) • packet_count - The number of probes to be sent at each TTL level. (Range:1-10) • time_out - The number of seconds to wait for a response to a probe packet. (Range:1-60) • ip-address - One of the device's interface addresses to use as a source address for the probes. The device normally selects what it feels is the best source address to use. • tos - The Type-Of-Service byte in the IP Header of the packet. (Range: 0-255) Default Configuration The default number of bytes in a packet is 40. The default maximum TTL value is 30. The default number of probes to be sent at each TTL level is 3. The default timeout interval in seconds is 3. Command Mode User EXEC mode User Guidelines • The traceroute command takes advantage of the error messages generated by the routers when a datagram exceeds its time-to-live (TTL) value. • The traceroute command starts by sending probe datagrams with a TTL value of one. This causes the first router to discard the probe datagram and send back an error message. The traceroute command sends several probes at each TTL level and displays the round-trip time for each. DELL CONFIDENTIAL - PRELIMINARY 9/13/06 - FOR PROOF ONLY System Management 367
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