Dell PowerConnect 6024 Command Line Interface (CLI) Guide (.htm) - Page 432

www.dell.com | support.dell.com Command Mode User EXEC mode User Guidelines The traceroute command takes advantage of the error messages generated by a router when a datagram exceeds its time-to-live (TTL) value. The traceroute user EXEC 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. The traceroute user EXEC command sends out one probe at a time. Each outgoing packet may result in one or two error messages. A "time exceeded" error message indicates that an intermediate router has seen and discarded the probe. A "destination unreachable" error message indicates that the destination router has received the probe and discarded it because it could not deliver the packet. If the timer goes off before a response comes in, the traceroute user EXEC command prints an asterisk (*). The traceroute user EXEC command terminates when the destination responds, when the maximum TTL is exceeded, or when the user interrupts the trace with Esc. If you want to find the trace to an out-of-band address, use the out-of-band IP address format oob/ip-address. 432 System Management