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324 Intel® Blade Server Ethernet Switch Modules SBCEGBESW1 and SBCEGBESW10 CLI Guide
The traceroute 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 device has seen and discarded the probe. A "destination unreachable" error
message indicates that the destination node 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 command prints an asterisk (*).
The
traceroute command terminates when the destination responds, when the maximum
TTL is exceeded or when the user interrupts the trace by pressing
Esc.
Example
The following example discovers the routes that packets will actually take when traveling
to their destination.
The following table describes significant fields shown above.
The following table describes characters that may appear in the
traceroute command
output.
Console> traceroute umaxp1.physics.lsa.umich.edu
Type Esc to abort.
Tracing the route to umaxp1.physics.lsa.umich.edu (141.211.101.64)
1 i2-gateway.stanford.edu (192.68.191.83) 0 msec 0 msec 0 msec
2 STAN.POS.calren2.NET (171.64.1.213) 0 msec 0 msec 0 msec
3 SUNV--STAN.POS.calren2.net (198.32.249.73) 1 msec 1 msec 1 msec
4 Abilene--QSV.POS.calren2.net (198.32.249.162) 1 msec 1 msec 1 msec
5 kscyng-snvang.abilene.ucaid.edu (198.32.8.103) 33 msec 35 msec 35 msec
6 iplsng-kscyng.abilene.ucaid.edu (198.32.8.80) 47 msec 45 msec 45 msec
7 so-0-2-0x1.aa1.mich.net (192.122.183.9) 56 msec 53 msec 54 msec
8 atm1-0x24.michnet8.mich.net (198.108.23.82) 56 msec 56 msec 57 msec
9 * * *
10 A-ARB3-LSA-NG.c-SEB.umnet.umich.edu (141.211.5.22) 58 msec 58 msec 58 msec
11 umaxp1.physics.lsa.umich.edu (141.211.101.64) 62 msec 63 msec 63 msec
Field Description
1 Indicates the sequence number of the device in the path to the host.
i2-gateway.stanford.edu Host name of this device.
192.68.191.83 IP address of this device.
1 msec 1 msec 1 msec Round-trip time for each probe sent.
Field Description
* The probe timed out.
? Unknown packet type.
A Administratively unreachable. Usually, this output indicates that an access list is
blocking traffic.
F Fragmentation is required and DF is set.